Преобразователь постоянного напряжения в переменное

Транзисторный инвертор

ТРАНЗИСТОРНЫЙ ИНВЕРТОР по авт. св. № 584417, отличающийся тем, что, с целью повышения КПД последовательно-встречно с дополнительной обмоткой выходного трансформатора включена вторичная обмотка дополнительного трансформатора тока, которая зашунтирована резистором , а последовательно с нагрузкой включена первичная обмотка трансформатора тока. i (Л сд оа ...

DC/AC-WANDLER

Inductively loaded switching transistors excess voltage protection - uses resistance forming part of capacitor discharge current circuit to reduce losses without lowering protection effectiveness

The circuit configuration is designed for the protection of inductively loaded switching transistors against excess voltages in electronic pushpull static frequency-changers. The circuit comprises a series-connected capacitor and diode, connected to a discharge current circuit, for the capacitor, that contains a resistance. The series circuit is in parallel with the collector-emitter circuit of the switching transistor. To prevent losses arising from the circuit arrangement which is required to protect the transistors against over-voltages, and without reducing the protection efficiency the resistance is exclusively a component part of a discharge current circuit in parallel with the capacitor. The discharge current consists of a series circuit with the supply voltage source of the push-pull freq. changer or of the supply voltage source and the primary of the freq. changer's power transformer.

ELECTRICAL INVERTER CIRCUIT ARRANGEMENTS

... 1324083 Inverting PLESSEY CO Ltd 6 Jan 1971 [9 Jan 1970] 1107/70 Heading H2F An inverter comprises a pair of transistors 5, 6, arranged to be switched on and off alternately each including a switching device 26, 26A and a time delay 22, 24 arranged to delay the switching on of either device for a period sufficient to ensure that the other device is first switched off and an asymmetrically conductive device 28, 28A arranged to bypass the switching device 26, 26A for turn-off currents.

TRANSISTOR SWITCHING CIRCUIT ARRANGEMENTS

... 1529760 Transistor switching circuits NIXDORF COMPUTER AG 2 Nov 1976 [8 Dec 1975] 45513/76 Heading H3T Switch-on of a transistor 1 in response to a control signal at 10 is speeded up by positive feedback through an autotransformer 7 and switch-off is speeded by a brief avalanche breakdown of the base-emitter junction due to reverse bias by the inductance of 7. The input transformer may be coupled to the transistor 1 through a full wave rectifier and an auxiliary transistor which isolates the transformer from the negative bias on the base of transistor 1 during switch-off. In another embodiment, the rectifier may be constituted by transistors which effect the isolation, Fig. 4 (not shown). The invention may be applied to a push-pull inverter, Fig. 5 (not shown).

SWITCHING CONFIGURATION FOR A CURRENT SUPPLY EQUIPMENT

SWITCHING CONFIGURATION FOR IGNITING AND TO THE ENTERPRISE OF GLOW LAMPS

POWER SUPPLY FOR A HIGH DENSITY DISCHARGE OR FLUORESCENT LAMP

POWER SUPPLY FOR A HIGH INTENSITY DISCHARGE OR FLUORESCENT LAMP This power supply for a high intensity gas discharge or fluorescent lamp exhibits near unity power factor with no third harmonic distortion, and facilitates highly efficient lamp operation with dimming capability. This is achieved by using an inverter to drive a resonant network that includes the lamp load. A feedback circuit adjusts the switching rate of the inverter to equal the resonant frequency of the network. Sinusoidal output voltage is achieved, together with voltage multiplication to a level sufficient to ignite the lamp and keep it lit during dimming. The inverter is driven by a switching regulator that is supplied with unfiltered, rectified ac power. A filter capacitor, connected across the regulator output, is sufficiently large so as to filter at the frequency of the rectified ac input. The regulator switching duty cycle is controlled in response to the average dc level across this filter capacitor. Lamp dimming ...

CONVERTER CIRCUIT WITH BALANCED PARALLEL SWITCHING PATHS

Transistor-Verstärker für Wechselströme

Verfahren zur Herstellung von 2-Sulfanilamido-5-methoxy-pyrimidin

Convertisseur de courant continu en courant alternatif

Dispositif d'alimentation pour un système de traitement d'informations

Anordnung zum Schalten einer induktiven Last mittels steuerbarer Halbleiterschalter und Verwendung derselben

STEUERSATZ IN EINEM WECHSELRICHTER.

Transformerless inverter circuit arrangement, particularly for grid connection of photovoltaic generator or fuel cell system, has synchronized and controlled commutator circuit connected on output side of direct current control circuit

The transformerless inverter circuit arrangement has synchronized and controlled direct current control circuits (GS1,GS2,GSn) for delivering an absolute sinusoidal modulated output current on an output side. A synchronized and controlled commutator circuit (PW) is connected on the output side of the direct current control circuit. Energy storage or voltage limiting devices (ES1,ES2) are connected between inlet connections or outlet connections of the commutator circuit.

DC low-voltage power supply octa-push-pull-oscillation power synthesis fluorescent lamp

ELECTRIC DRIVE VEHICLE

Apparatus for electric motor

Apparatus for generating alternating power signals

CONVERTER CONTINU-ALTERNATIF

GATE FOR STATIC INVERTER CONTINU-ALTERNATIF

ELECTRICAL INVERTER CIRCUIT ARRANGEMENTS

Apparatus and methods for generating an AC power signal for cable TV distribution systems

A cable TV distribution system in which an AC power signal is generated according to the following steps: (a) generating an AC power signal having at least a positive half-cycle, where the positive half-cycle comprises a rising portion, a falling portion, and a central portion; and (b) limiting the slew rate of the AC power signal within the rising portion to a range of 30 V/ms and 50 V/ms inclusive. Preferably, the slew rate of the AC power signal within the falling portion is limited to the range of -30 V/ms and -50 V/ms inclusive. The AC power signal is preferably generated by a power supply comprising: (a) circuit that generates a first drive signal having a first portion comprising a series of pulses, a second portion comprising a series of pulses, and a third portion comprising a single pulse; (b) a drive circuit that generates a pulsed power signal the timing of which corresponds to the timing of the first drive signal; (c) a transformer; and (d) an output capacitor for integrating ...

PUSH PULL INVERTER

The present invention discloses a push pull inverter, which includes a DC source VDC, inductors La and Lb, wherein the inductor La is connected with the inductor Lb, an anode of the DC source VDC is connected to the inductors La and Lb through an inductor Ld and a resistor Rd, a voltage of a second end of the inductor La is loaded to a drain of a switching tube S1, a voltage of a second end of the inductor Lb is loaded to a drain of a switching tube S2, a source of the switching tube S1 and a source of the switching tube S2 are connected to a cathode of the DC source VDC, and a resonant circuit is connected between the inductor La and the inductor Lb. The present invention decreases the current of the push pull inverter and increases the voltage by changing an operating frequency and injecting a drive signal.

POWER CONVERSION DEVICE

The present invention provides a power converter, wherein voltage fluctuations of an operation power supply of a switching element of a converter are suppressed. A switching element (Tr2) connects/disconnects an input end (Pr) to/from at least either of power supply lines (LH, LL). A switching element (Tr1) is provided between the power supply lines (LH, LL). One end on the low potential side of a power supply unit (Cbr1) is connected to the switching element on the side of either of the power supply lines (LH, LL). One end of a capacitor (Cbr2) is connected between the switching element (Tr1) and the input end (Pr). The other end of the capacitor (Cbr2) is connected to one end on the high potential side of the power supply unit (Cbr1). The capacitor (Cbr2) and the power supply unit (Cbr1) respectively serve as operation power supplies for outputting switch signals to the switching elements (Tr2, Tr1). A voltage adjustment unit (CCr) maintains voltage across both ends of the capacitor ( ...

POWER SUPPLY APPARATUS FOR A CAPACITIVE LOAD

БЛОК ПИТАНИЯ ДЛЯ ЕМКОСТНОЙ НАГРУЗКИ

... 1. Блок питания (100) для подачи электрической мощности переменного тока на емкостную нагрузку (300), имеющую полное сопротивление емкостной нагрузки, причем указанный блок содержит: ! трансформатор (110, 500) с первой катушкой (120, 510) и второй катушкой (130, 520), причем первая катушка имеет первую и вторую полу катушки с общим средним ответвлением (121), и ! формирователь положительных полупериодов (160, 151, 170) и формирователь отрицательных полупериодов (160, 151, 180), предназначенные для попеременной подачи положительных полупериодов напряжения и отрицательных полупериодов напряжения в первую и вторую полукатушки соответственно первой катушки (120, 510), ! причем вторая катушка (130, 520) может подключаться к емкостной нагрузке (300) так, чтобы образовывать электрический резонансный контур, имеющий резонансную частоту, и подавать электрическую мощность переменною тока на резонансной частоте на нагрузку (300), ! и ! устройство (160) для определения прохождений через нуль напряжения ...

Преобразователь выпрямленного напряжения сети

Устройство для раздельного управления реверсивным вентильным преобразователем

Двухтактный транзисторный преобразователь постоянного напряжения

Schaltung zur Unterdrueckung von Spannungsspitzen an Transistoren

Transistorwechselrichter-Schaltung fuer grosse Stromstaerken

Inverter

... 997,706. Inverting. WESTINGHOUSE ELECTRIC CORPORATION. May 30, 1962 [June 19, 1961], No. 20828/62. Heading H2F. [Also in Divisions G4 and H3] An inverting system comprises a number of square wave inverters having their outputs connected in series and phase displaced, so that the total output voltage approximates to a sine wave. The Specification derives a formula connecting the peak values of each square wave, the number of generators and their phase angles in terms of the peak value of the sine wave (Fig. 1, not shown) whose graph encloses the same area as the stepped wave form of the inverting system. In the embodiment of Fig. 6a and 6b the voltages appearing at each phase of the outputs LA, LB, LC are the vector sum of the voltages of five of the six inverters M, N, P, P, Q and R which are controlled from the pulse generator 2 through bi-stable circuits FM, FN . . . FR. Control circuit.-Each bi-stable circuit, one of which is shown within the dotted line F in Fig. 7, has two transistors ...

Electronic ballast and lighting system utilizing it

Electronic ballast for gas discharge lamps, particularly fluorescent tubes, which supplies them with high frequency AC at proper voltage from a supply of DC, such as a battery, solar cell or rectifier adapted to be connected to a commercial source of AC of any voltage, frequency and phase. The ballast is adapted to be used in combination with electrical system, e.g., the electrical system of a building, with many electrical connecting means such as fixtures for holding the fluorescent tubes, commercial frequency distribution means for AC at voltage suitable for appliances, small motors, etc, and the high frequency AC distribution system connecting the source of DC to one or more ballasts to supply the tubes to be used in the fixtures. The ballast includes inverting means (40) comprising a symmetrical class B, push-pull, current limited, dual feedback oscillator and preferably also not only a high frequency transformer (54) to deliver the output of the oscillator to the building wiring system ...

DC TO AC INVERTERS

A CIRCUIT OR CONVERTING A DIRECT CURRENT POTENTIAL TO AN ALTERNATING CURRENT POTENTIAL

... 1,241,153. D.C.-A.C. conversion. GENERAL MOTORS CORP. 15 Jan., 1970 [27 May, 1969], No. 1978/70. Heading H2F. In a D.C.-A.C. converter, a pair of fieldeffect transistors (FET) 40, 50 are connected in parallel between one side of the D.C. input 10 and an output circuit, the FET's being biased by a D.C. source so as to be conductive and having a further pair of transistors 80, 90 connected across their control circuits and controlled by an A.C. signal so that the FET's become non-conductive alternately. The frequency is determined by a 400 Hz. source 24 which is rectified at 30, 31 so as to provide bias for the gates 43, 53 of the FET's 40, 50. The bias is short-circuited by transistors 80, 90 at a time depending on the setting of phase shifters 34, 35; 36, 37, so that the phase of the output is a function of the setting of resistors 34, 36.

Procedure for the production of 2-Sulfanilamido-5-methoxypyrimidin

SWITCHING CONFIGURATION TO THE ZUENDEN AND TO THE ENTERPRISE OF GLOW LAMPS

DC/CAC TRANSDUCER

Resonant power supplies

POWER SUPPLY FOR A HIGH DENSITY DISCHARGE OR FLUORESCENT LAMP

POWER SUPPLY APPARATUS FOR A CAPACITIVE LOAD

The invention provides a power supply apparatus for supplying electric po wer to a capacitive load. The apparatus has a transformer, a positive half-p eriod driver and a negative half-period driver supplying positive and negati ve half-periods of voltage to the first coil. The second coil forms an elect ric resonance circuit and supplies electric voltage to the load. Zero crossi ngs of the voltage supplied to the first coil are determined from a third co il on the transformer, and alternation between positive and negative half-pe riods of voltage supplied to the first coil is done at the zero crossings of the voltage supplied to the first coil.

Static conversion of D.C. current into alternative course

Converter with high supply voltage

PROCESS AND DEVICE INTEND FOR the CONVERSION OF the TENSION Of a SOURCE OF CONTINUOUS TENSION

Assembly of order for apparatus inverter of power

Circuit polyphase inverter

Inert gas discharge lamp supply circuit - has oscillator driving battery:powered pushpull inverter coupled to lamps transformer

ONDULEUR A TRANSISTORS

L'INVENTION EST RELATIVE A UN ONDULEUR A TRANSISTORS, COMPORTANT UNE PAIRE DE TRANSISTORS DE PUISSANCE 1, 2 COMMANDES EN ALTERNANCE PAR UN INTERRUPTEUR ELECTRONIQUE 3 ET ATTAQUANT UN TRANSFORMATEUR DE SORTIE 7. UN TRANSFORMATEUR D'INTENSITE 10 EST CONNECTE EN SERIE AVEC LA CHARGE AU SECONDAIRE DU TRANSFORMATEUR DE SORTIE 7 PRECITE, CE TRANSFORMATEUR D'INTENSITE 10, ETANT CONNECTE, PAR SON SECONDAIRE 11 A UN REDRESSEUR 12, ASSURANT L'ALIMENTATION DU CIRCUIT DE BASE DES TRANSISTORS DE PUISSANCE 1, 2 ET DES ETAGES PRECEDENTS.

BALLAST WITH HIGH FREQUENCY TRANSISTORS

УСТРОЙСТВО ДЛЯ ОБЕСПЕЧЕНИЯ ПАРАЛЛЕЛЬНОЙ РАБОТЫ ИНВЕРТОРОВ

Изобретение относится к области электротехники и может быть использовано в силовой преобразовательной технике, а именно для управления автономными инверторами, включенными параллельно на общую нагрузку. Техническим результатом является стабилизация напряжения при параллельной работе однофазных автономных инверторов на трехфазную нагрузку. Устройство для обеспечения параллельной работы автономных инверторов содержит первый и второй автономные инверторы, однофазно-трехфазный трансформатор с вращающимся магнитным полем с четырьмя первичными и трехфазной вторичной обмотками, первый и второй фазосдвигающие конденсаторы, систему управления, содержащую формирователь импульсов, задающий генератор пилообразного напряжения и распределительное устройство. Вход трансформаторно-выпрямительного блока соединен с нагрузкой, а его выход - с первым входом формирователя импульсов, второй вход которого соединен с выходом задающего генератора пилообразного напряжения. Выход формирователя импульсов соединен ...

Магнитотранзисторный преобразователь

Gesteuerte Hochfrequenzleistungsversorgung.

Phasenueberwachungseinrichtung

Hochspannungsoszillator

ANSTEUERSCHALTUNG VON LEISTUNGSTRANSISTOREN FUER GETAKTETE LEISTUNGSSTELLGLIEDER

Magnetically controlled switching circuits employing transistors

... 987,707. Transistor pulse-generating circuits; circuits employing bi-stable magnetic elements. HOOVER CO. May 8, 1962 [May 9, 1961], No. 17729/62. Headings H3B and H3T. A pulse-generating switching circuit comprises a transistor, a rectifier diode and a saturable core transformer, the diode being connected in series in the emitter-collector path of the transistor in a direction to conduct forwardly when the transistor is conducting, a first winding of the transformer being connected in parallel with the diode and a second winding being connected between emitter and base of the transistor, the two windings being coupled regeneratively so that on the transistor commencing to conduct the current flow in the first winding induces a voltage in the second winding biasing the transistor into saturation, current through the first winding increasing until the core saturates whereupon by further regenerative action the transistor is switched off, and means being provided for applying a current to ...

Inverting apparatus

... 1,027,298. Inverting. WESTINGHOUSE ELECTRIC CORPORATION. May 26, 1964 [June 3, 1963], No. 21753/64. Heading H2F. in a transistor inverter comprising an oscillator 6, a controlling stage 4 and power stage 2 means are provided to deal with reactive current due to inductive loads, these means comprising a transformer 46 connecting the controlling stage to the power stage and including additional windings 62, 66 which are connected in the emitter-collector paths of the main transistors. The oscillator 6 includes transistors 16, 18 and a transformer 12 having a square loop core 31. Positive D.C. is derived from a bus 20, which is also connected to a common line 30 through a resistor 32 to effect starting. The base-emitter circuits of the transistors are completed to earth through a resistor 34 and a diode 36 poled to prevent direct current flow from the resistor 32. Square wave output is furnished on the windings 38, 40. The control stage 4 includes transistors 8, 10 and the transformer 46 whose ...

POWER SUPPLIES FOR DISCHARGE LAMPS

DC/CAC TRANSDUCER

High frequency inverter

INVERTER WITH A GLEICHSPANNUNGSQUELLE AND A CHOPPER PART.

Power conversion device

Provided is a power conversion device wherein voltage fluctuations of an operation power source of a switching element of a converter are suppressed. A switching element (Tr2) connects/disconnects an input end (Pr) to/from at least either of power lines (LH, LL). A switching element (Tr1) is provided between the power lines (LH, LL). One end on the low potential side of a power supply unit (Cbr1) is connected to the switching element on the side of either of the power lines (LH, LL). One end of a capacitor (Cbr2) is connected to a point between the switching element (Tr1) and the input end (Pr). The other end of the capacitor (Cbr2) is connected to one end on the high potential side of the power supply unit (Cbr1). The capacitor (Cbr2) and the power supply unit (Cbr1) respectively serve as operation power sources for outputting switch signals to the switching elements (Tr2, Tr1). A voltage adjustment unit (CCr) maintains voltage across both ends of the capacitor (Cbr2).

Power converter

Provided is a power conversion device capable of obtaining the operation voltage of a switching element of a power conversion unit from an operation power source of a switching element of a switch circuit. A power supply unit (Ed) has one end on the low potential side, said end being connected to a switching element (Ty2) on the power line (LL) side, and serves as an operation power source for outputting a switch signal to the switching element (Ty2). A switching element (Tx2) comprises a first and a second electrode and passes an electric current in only a direction from the second electrode to the first electrode. A diode (Dx22) is connected in parallel to the switching element (Tx2) while the cathode thereof is directed to a power line (LH). A capacitor (Cbx2) has one end connected to the first electrode of the switching element (Tx2) and the other end connected to the other end of the power supply unit, and serves as an operation power source for outputting a switch signal to the switching ...

Static inverter of electrical energy

Detmn of ribonucleic acid distribution in cells

Generator of sinusoidal signals

Device converter of current

Transformer with three reels and two carcasses

УСТРОЙСТВО ДЛЯ ОБЕСПЕЧЕНИЯ ПАРАЛЛЕЛЬНОЙ РАБОТЫ ИНВЕРТОРОВ

Устройство для обеспечения параллельной работы двух однофазных автономных инверторов, работающих на общую нагрузку, отличающееся тем, что содержит однофазно-трехфазный трансформатор с вращающимся магнитным полем и систему управления однофазными автономными инверторами, причем четыре первичные обмотки размещены на тороидальной части трансформатора, первый выход первого автономного инвертора соединен с началом первой первичной отмотки трансформатора и через первый фазосдвигающий конденсатор - с началом третьей первичной обмотки трансформатора с вращающимся магнитным полем, а второй выход первого автономного инвертора соединен с концом первой и третьей первичных обмоток трансформатора, первый выход второго автономного инвертора соединен с началом второй первичной обмотки трансформатора и через второй фазосдвигающий конденсатор с началом четвертой первичной обмотки трансформатора с вращающимся магнитным полем, а второй выход второго автономного инвертора соединен с концом второй и четвертой ...

SCHALTUNGSANORDNUNG ZUR VERRINGERUNG DER ABSCHALTVERLUSTLEISTUNG UND ZUR EINSCHALTEBESCHLEUNIGUNG EINES SCHALTTRANSISTORS

Einrichtung zum Schutz von Halbleiter-elementen vor UEberbelastung

Inverter

... 988,009. Inverting. WESTINGHOUSE ELECTRIC CORPORATION. May 16, 1962 June 19, 1961], No. 18868/62. Heading H2F. [Also in Division H3] The Specification relates to an inverting arrangent in which a number of square wave inverters have their outputs phase displaced and connected in series to give an approximately sinusoidal output. The individual inverters comprise two controlled rectifiers 82, 88 and an output transformer 18. The claims are directed to a method of turning off the controlled rectifiers. To turn off the controlled rectifier 82, for example, the series combination of another controlled rectifier 84 and transistor 171, which is in parallel with the controlled rectifier 82, is made conductive; the voltage across the controlled rectifier 82 then falls to a value sufficiently low for it to turn off. The series combination is then made non-conducting by turning off the transistor 171. The circuit 172 including the transistor 171 is used to turn off all the main rectifiers in turn ...

Driver circuits and techniques

ELECTRONIC BALLAST AND LIGHTING SYSTEM

DC/AC CONVERTER

IMPROVEMENTS IN OR RELATING TO NUMBER-INDICATING TUBE CIRCUITS

... 1301107 Selective signalling BELL PUNCH CO Ltd 5 Nov 1970 [13 Nov 1969] 55651/69 Heading G4H Apparatus for generating an electrode voltage for a number tube 1 includes a transformer 9 with a centre-tapped primary 11, the two ends of which are pulsed in turn, a non-linear resistive device D1 being connected to one end of the secondary winding 7. In Fig. 1, a series of 1-out-of-10 markings at 3 are displayed on respective number tubes 1 (only two shown) enabled in turn by respective outputs T1, T2... of a ring counter 15 using a circuit as shown for each pair of tubes. A second embodiment differs in using a secondary winding without a centre tap, its ends being connected directly to the anodes of the tubes, the diodes being connected between the anodes and the 15 volt supply. A third embodiment differs from the second in having the ends of the primary energized alternately via respective diodes from two lines common to all the pairs of tubes, the primary centre-taps for the various pairs ...

SWITCHING CONFIGURATION FOR A CURRENT SUPPLY EQUIPMENT

SCHALTUNGSANORDNUNG ZUM ZUENDEN UND ZUM BETRIEB VON ENTLADUNGSLAMPEN

SCHALTUNGSANORDNUNG FUER EIN STROMVERSORGUNGS- GERAET

DC/AC-WANDLER

CONVERTER CIRCUIT WITH BALANCED PARALLEL SWITCHING PATHS

TRANSISTOR SWITCHING CIRCUIT WITH FEEDBACK INDUCTOR

POWER SUPPLY APPARATUS FOR A CAPACITIVE LOAD

The invention provides a power supply apparatus for supplying electric power to a capacitive load. The apparatus has a transformer, a positive half-period driver and a negative half-period driver supplying positive and negative half-periods of voltage to the first coil. The second coil forms an electric resonance circuit and supplies electric voltage to the load. Zero crossings of the voltage supplied to the first coil are determined from a third coil on the transformer, and alternation between positive and negative half-periods of voltage supplied to the first coil is done at the zero crossings of the voltage supplied to the first coil.

TRANSISTOR AMPLIFIER FOR ALTERNATING CURRENTS

Transistor oscillator for HF DC=DC converter - uses pair of power transistors working into centre tapped output transformer and electronic base drive with current feedback

Inert gas discharge lamp supply circuit - has oscillator driving battery:powered pushpull inverter coupled to lamps transformer

BALLAST HAS HIGH FREQUENCY TRANSISTORS

Преобразователь электрической энергии

Преобразователь электрической энергии, содержащий источник постоянного тока, к одному и другому полюсам которого подключены входы датчика напряжения, выход которого подключен к первому входу блока управления, первый датчик тока, одна клемма которого подключена к одному полюсу источника постоянного тока, а другая - к одной клемме одного конденсатора, выход первого датчика тока подключен ко второму входу блока управления, два последовательно включенных по силовой цепи транзистора, параллельно которым подключены диоды, управляющие входы транзисторов подключены соответственно к первому и второму выходам блока управления, точка соединения транзисторов через последовательно соединенные второй датчик тока, дроссель и один замыкающий контакт реле подключена к одной шине переменного тока, управляющий вход реле подключен к третьему выходу блока управления, датчик напряжения однофазной сети, входы которого подключены к шинам переменного тока, транзисторный ключ, отличающийся тем, что в него введены другой конденсатор, фазовый детектор, первый и второй модули квадратурных сигналов, один вход первого модуля квадратурных сигналов соединен с выходом датчика напряжения однофазной сети, выход первого модуля квадратурных сигналов соединен с входом фазового детектора, выход которого соединен с вторым входом первого модуля квадратурных сигналов и одним входом второго модуля квадратурных сигналов, другой вход которого соединен с выходом второго датчика тока, выход второго модуля квадратурных сигналов подключен к третьему входу блока управления, концы силовой цепи транзисторов подключены соответственно к другой клемме РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК H02M 7/537 (13) 166 998 U1 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2016129030/07, 15.07.2016 (24) Дата начала отсчета срока действия патента: 15.07.2016 (73) Патентообладатель(и): Вольский Сергей Иосифович (RU) (45) Опубликовано: 20.12. ...

MULTILEVEL INVERTER

Multilevel DC to AC power converter has three DC inputs (IN, IN, IN) for receiving, respectively, three DC voltages (V,V,V), wherein V>V>V, one AC output (OUT) for delivering an AC voltage (Va), a set of at least six switching means (T,T,T,T,T,T) arranged in a symmetric pyramidal fashion, and switch control means for controlling an ON/OFF state of each of the six switching means. The switch control means is configured such that the top two switching means (T,T) are switched ON and OFF in a complementary fashion and, exclusively, at a fundamental frequency (Fa) of the AC voltage to be delivered at the AC output (OUT), whereas at least some of the other four switching means (T,T,T,T) are switched ON and OFF at higher frequencies. The top two switching means (T,T) are hence subject to lower switching losses, thereby increasing the overall efficiency of the converter. 2. The inverter module according to claim 1 , wherein the first claim 1 , second claim 1 , third and fourth switching means are semiconductor devices having first specifications and in that the fifth and sixth switching means are semiconductor devices having second specifications claim 1 , wherein the second specifications are different specifications than the first specifications.3. The inverter module according to claim 2 , wherein each of the fifth and sixth switching means presents an intrinsic conduction loss that is lower than an intrinsic conduction loss of each of the first claim 2 , second claim 2 , third and fourth switching means.4. The inverter module according to claim 3 , wherein the fifth and sixth switching means are thyristor-type semiconductors claim 3 , and in that the first claim 3 , second claim 3 , third and fourth switching means are transistor-type semiconductors.5. An inverter comprising at least two inverter modules according to .6. A three-phase inverter comprising three legs claim 1 , each leg comprising at least one inverter module according to . The invention relates to ...

Precision Switching For Carrier Based PWM

A voltage source converter station including a multilevel voltage source converter, for conversion of electrical power between AC and DC, and a control system. The voltage source converter includes a plurality of switching cells including switchable semiconductors, and the control system includes at least one main control unit for providing a voltage reference signal and a plurality of cell control units. Each cell control unit uses carrier based pulse width modulation for controlling the switching of a respective cell, where the main control unit is communicatively connected to the cell control units and provides the reference voltage signal to each cell control unit and each cell control unit creates a switching signal to each respective switching cell using the reference voltage signal and a carrier signal to effectuate the conversion. 1. A voltage source converter station including a multilevel voltage source converter , for conversion of electrical power between AC and DC , and a control system , the voltage source converter comprises a plurality of switching cells including switchable semiconductors , and the control system comprises at least one main control unit for providing a voltage reference signal to a plurality of included cell control units , each cell control unit using carrier based pulse width modulation for controlling the switching of a respective cell , wherein the main control unit is communicatively connected to the cell control units and provides the reference voltage signal to each cell control unit and each cell control unit creates a switching signal to each respective switching cell using the reference voltage signal and a carrier signal to effectuate the conversion characterized in thateach of the cell control units process signals at a higher frequency than the main control unit, wherein each cell control unit includes a reference signal reconstruction unit, for adapting the voltage reference signal to the higher frequency of the cell ...

VOLTAGE INVERTER AND METHOD OF CONTROLLING SUCH AN INVERTER

A voltage inverter capable of operating in the event of a short-circuit or open-circuit fault. The voltage inverter includes: a load having three phases, each phase having a first terminal and a second terminal; first and second cells each including three branches connected together in parallel, each branch including two switches connected in series and a mid-point positioned between the two switches, each first terminal of each of the phases being connected to one of the mid-points of the first cell and each second terminal of each of the phases being connected to one of the mid-points of the second cell; and a DC voltage source, the first and second cells each being connected to the DC voltage source via two electrical isolators. 2. The voltage inverter according to claim 1 , wherein each switch consists of a static switch mechanism and a diode in antiparallel.3. The voltage inverter according to claim 1 , comprising a malfunction control and monitoring device configured to:control the switches and the electrical isolators,detect a malfunction in one of the switches, anddetect a malfunction in the connection between one of the terminals of one of the phases and one of the mid-points.4. The voltage inverter according to claim 1 , wherein each mid-point is connected to a neutral point via a switching element claim 1 , the switching element being capable of being placed in a blocking state or a passing state.5. A method for controlling a voltage inverter according to claim 1 , wherein claim 1 , when no fault is detected claim 1 , the method comprises:placing the electrical isolator connected to the first cell into a blocking state,controlling the switches of the first cell such that the first cell forms a neutral point to which the n phases of the load are connected,placing the electrical isolators connected to the second cell into a passing state;controlling the switches of the second cell such that the two switches in the same branch of the second cell are in ...

SEMICONDUCTOR DEVICE, POWER CONVERTER AND METHOD FOR CONTROLLING THE POWER CONVERTER

Disclosed is a semiconductor device which includes: a semiconductor element including a first metal-insulator-semiconductor field-effect transistor and a second metal-insulator-semiconductor field-effect transistor which is connected in parallel with the first metal-insulator-semiconductor field-effect transistor; and a control section which controls the operation of the semiconductor element. The control section controls the semiconductor element so that in a forward direction mode, current flows in a forward direction through the first and second metal-insulator-semiconductor field-effect transistors but that in a reverse direction mode, current flows in the reverse direction through the first metal-insulator-semiconductor field-effect transistor but does not flow through the second metal-insulator-semiconductor field-effect transistor. 1. A semiconductor device comprising:a semiconductor element including a first metal-insulator-semiconductor field-effect transistor and a second metal-insulator-semiconductor field-effect transistor which is connected in parallel with the first metal-insulator-semiconductor field-effect transistor; anda control section which controls the operation of the semiconductor element, andwherein each of the first and second metal-insulator-semiconductor field-effect transistors includes:a source electrode;a drain electrode;a gate electrode; anda silicon carbide semiconductor layer which functions as a channel, andwherein the direction of current flowing from the drain electrode through the silicon carbide semiconductor layer toward the source electrode is defined to be a forward direction and the direction of current flowing from the source electrode through the silicon carbide semiconductor layer toward the drain electrode is defined to be a reverse direction, andwherein the control section is configured to control the semiconductor element so that in a forward direction mode, current flows in the forward direction through the first and ...

SOLID-STATE INDUCTIVE CONVERTER

A converter configured to transform DC into AC. Includes a first and second transistor with connected bases and emitters, and a coil or inductor having a first end that is connected to the bases, a second end that is free, and a common central zero, which is connected to the emitters and divides the inductor into two equal portions, a first portion from the end to a central zero and a second portion from the latter to the end. The circuit is supplied by a direct current applied to the collectors and envisages at least one output between said second end and the collector of one of the two transistors configured to supply a respective load and behaves substantially as a capacitor or electroluminescent cable/panel. Transistors work alternatively by following the cycles of charging and discharging of the load and obtain a supply current having a substantially perfect sinusoidal waveform. 2112. The converter according to claim 1 , wherein the two portions of the inductor (L) are insulated from one another at the central zero (C) itself or else are constituted by two distinct inductors (V claim 1 , V) with the central zero (C) in common.3111. The converter according to claim 1 , wherein claim 1 , when the first transistor (T) is active claim 1 , it is traversed by a current that traverses the inductor (L) claim 1 , in the second portion from the central zero (C) to the end (B) claim 1 , until the load (C) is reached claim 1 , which charges until it reaches the maximum of the voltage envisaged.411111. The converter according to wherein claim 3 , when the load (C) has reached the maximum voltage envisaged claim 3 , said current ceases to traverse the transistor (T) and the inductor (L) claim 3 , thus obtaining that the first transistor (T) goes into inhibition and across the inductor (L) there is generated a current opposite to the initial one.5112. The converter according to wherein claim 4 , when the load (C) starts to discharge claim 4 , a further opposite current is ...

ELECTRIC POWER CONVERTER HAVING PLURALITY OF SEMICONDUCTOR MODULES ARRAYED IN SUCCESSIVE LAYERS

In an electric power converter, a stacked-layer unit has a plurality of semiconductor modules arrayed as layers along a stacking direction, each semiconductor module containing a semiconductor element and a pair of power terminals protruding outward in a protrusion direction at right angles to the stacking direction, each pair consisting of an AC terminal and a positive-polarity or negative-polarity power terminal. The semiconductor modules are arranged with the positive-polarity and negative-polarity power terminals in a single column at one side of the stacked-layer unit, and respectively connected to a positive-polarity busbar and negative-polarity busbar which are located at that side and which are separated by a fixed spacing in the protrusion direction, while the AC terminals of each layer-adjacent pair of semiconductor modules are connected in common to a corresponding one of a plurality of AC busbars. 1. An electric power converter comprisinga stacked-layer unit comprising a plurality of semiconductor modules arrayed in layers along a stacking direction, and a plurality of coolant passages formed adjacent to said semiconductor modules and configured for passing a flow of a coolant to cool said semiconductor modules, each of said semiconductor modules comprising an internal semiconductor element and a pair of power terminals, each of said power terminals protruding externally along a protrusion direction at right angles to said stacking direction,a positive-polarity busbar and a negative-polarity busbar for carrying a DC current, respectively connected to predetermined ones of said power terminals, and a plurality of AC busbars for carrying AC currents, respectively connected to predetermined ones of said power terminals, anda terminal strip disposed adjacent to a first side of said stacked-layer unit, with respect to a width direction which is at right angles to said stacking direction and to said protrusion direction, said terminal strip comprising a ...

INVERTER SCALABLE IN POWER AND FREQUENCY

An inverter is proposed for providing an inverter output signal scalable in frequency. The inverter has a controller for controlling frequency of the inverter output signal according to a predefinable value. In order to generate a signal having a frequency value prescribed for the inverter output signal, the controller initiates a time delay of signals and superimposes the signals onto the signal having the frequency value prescribed for the inverter output signal. A low-complexity inverter concept for high voltages or high power is thus provided 110.-. (canceled)11. An inverter for providing an inverter output signal that is scalable in power and frequency , comprising:a controller for controlling the frequency of the inverter output signal according to a definable value,wherein the controller is adapted to cause signals of the inverter to have a time delay and to superimpose the signals being time delayed on the inverter output signal having a frequency specified for the inverter output signal.12. The inverter as claimed in claim 11 , wherein the controller is adapted to cause the superimposed signals having the frequency that can be specified.13. The inverter as claimed in claim 11 , wherein the inverter comprises a plurality of inverter units and links signals of the inverter units for generating the inverter output signal.14. The inverter as claimed in claim 13 , wherein each of the inverter units comprises a transformer.15. The inverter as claimed in claim 13 , wherein the controller is adapted to cause the signals of the inverter units to have the time delay and to superimpose the signals of the inverter units being time delayed on the inverter output signal having the frequency specified for the inverter output signal.16. The inverter as claimed in claim 15 , wherein the inverter comprises a transformer for superimposing the signals of the inverter units.17. The inverter as claimed in claim 13 , wherein the inverter is constructed in keeping with a cascading ...

PARALLEL INVERTER DEVICE AND METHOD FOR CONTROL THEREOF

Inverters connected in parallel each include a power converter that carries out a direct current to alternating current conversion and supplies voltage to a motor, and a control unit, where one of the inverters is a master inverter and the control unit computes a voltage command value for the power converter in the one inverter, while the other inverter is a slave inverter and the power converter in the slave inverter is driven by the voltage command value, a transmission means transmits the voltage command value, and the control unit of the master inverter includes a delay device that delays the voltage command value by a transmission time needed when transmitting a computed voltage command value to the slave inverter, and provides the voltage command value delayed by the delay device to the power converter of the master inverter. 1. A parallel inverter device , comprising a plurality of inverters connected in parallel that supply alternating current voltage to a single load and a transmission means , wherein a power converter that converts direct current to alternating current and supplies alternating current voltage to the single load, and', 'a power converter control unit;, 'each of the plurality of inverters includes'}one of the inverters is a master inverter, the control unit thereof computing a voltage command value for the power converter in the master inverter, and an other of the inverters is a slave inverter, the power converter of the slave inverter being driven in accordance with said voltage command value;the transmission means transmits the voltage command value computed by the control unit of the master inverter to the slave inverter; andthe control unit of the master inverter includes a delay device that delays the voltage command value by a transmission time needed for transmitting a computed voltage command value to the slave inverter, and provides the voltage command value delayed by the delay device to the power converter of the master inverter. ...

POWER SEMICONDUCTOR DEVICE

Among first IGBTs and first MOSFETs, a transistor arranged near a first gate control circuit gives, through a gate thereof, a gate control signal supplied from the first gate control circuit to a gate of a transistor arranged at a position farther from the first gate control circuit. Among second IGBTs and second MOSFETs, a transistor arranged near a second gate control circuit gives, through a gate thereof, a gate control signal supplied from the second gate control circuit to a gate of a transistor arranged at a position farther from the second gate control circuit. 1. A power semiconductor device comprising , in a modularized manner:an inverter including first and second switching parts that operate in a complementary manner, said first and second switching parts being interposed in series with each other between a first power supply line that supplies a first voltage and a second power supply line that supplies a second voltage; andfirst and second control circuits for controlling switching operations of said first and second switching parts, respectively,whereinsaid first switching part includes a first IGBT and a first MOSFET, one main electrode of each of said first IGBT and said first MOSFET being connected to said first power supply line and the other main electrode of each of said first IGBT and said first MOSFET being connected to an output node of said inverter,said second switching part includes a second IGBT and a second MOSFET, one main electrode of each of said second IGBT and said second MOSFET being connected to said second power supply line and the other main electrode of each of said second IGBT and said second MOSFET being connected to said output node of said inverter, said first control circuit is arranged at a position opposed to said first switching part, and one of said first IGBT and said first MOSFET is arranged near said first control circuit while the other of said first IGBT and said first MOSFET is arranged at a position farther from ...

POWER LAYER GENERATION OF INVERTER GATE DRIVE SIGNALS

Techniques include systems and methods of synchronizing multiple parallel inverters in a power converter system. In one embodiment, control circuitry is connected to a power layer interface circuitry at each of the parallel inverters, via an optical fiber interface. The system is synchronized by transmitting a synchronizing pulse to each of the inverters. Depending on the operational mode of the system, different data exchanges may occur in response to the pulse. In an off mode, power up and power down data may be exchanged between the control circuitry and the inverters. In an initiating mode, identification data may be transmitted from the inverters to the control circuitry. In an active mode, control data may be sent from the control circuitry to the inverters. In some embodiments, the inverters also transmit feedback data and/or acknowledgement signals to the control circuitry. Power layer circuitry of the inverter adjusts a local clock based upon sampled data from the control circuitry to maintain synchronicity of the inverters between synchronization pulses. 1. A system for controlling operation of power inverter switches , comprising:control circuitry configured to generate gate timing-related signals for timing of state changes of the switches;a plurality of inverters coupled to the control circuitry in parallel, the output of the inverters being coupled to provide a common 3-phase output, each inverter comprising power layer circuitry and a plurality of solid state switches coupled to the power layer circuitry; anda plurality of data conductors, one data conductor coupled between the control circuitry the power layer circuitry of each inverter for conveying the gate timing-related signals from the control circuitry to the respective power layer circuitry;wherein power layer circuitry of each inverter is configured to receive the gate timing-related signals and to recompute the timing for the state changes based upon the received gate timing-related signals ...

POWER CONVERSION APPARATUS

A power conversion apparatus includes a comparison circuit which compares a determination element related to a loss in the power converter with a switching reference value and outputs a determination instruction when a difference has occurred between them, a determination circuit which outputs a two-level operation switching instruction when the determination element is greater than or equal to the switching reference value, and a switching circuit which, when having received a two-level operation switching instruction, turns off the alternating-current switch and turns on the valve devices in the arm sequentially, thereby bringing the power converter into a two-level operation state. 1. A power conversion apparatus comprising:first and second direct-current power supplies connected in series; anda power converter that converts direct-current power from each of the power supplies into alternating-current power and supplies the alternating-current power to an alternating-current power system,the power converter being so configured that at least two valve devices constituted of semiconductor elements are connected in series to constitute one arm, at least three units of this arm are connected in parallel, an alternating-current switch constituted of a series connection of at least two valve devices each constituted of a semiconductor element and a diode connected in inverse parallel with the semiconductor element is connected between a connection point of the valve devices and a connection point of the direct-current power supplies in each arm, and each of the alternating-current switches is turned on or off, thereby enabling the power converter to perform three-level operation or two-level operation,the power conversion apparatus further comprising:a comparison circuit which compares a determination element related to a loss in the power converter with a switching reference value and outputs a determination instruction when a difference has occurred between the ...

Power supply apparatus for a capacitive load

The invention provides a power supply apparatus for supplying electric power to a capacitive load. The apparatus has a transformer, a positive half-period driver and a negative half-period driver supplying positive and negative half-periods of voltage to the first coil. The second coil forms an electric resonance circuit and supplies electric voltage to the load. Zero crossings of the voltage supplied to the first coil are determined from a third coil on the transformer, and alternation between positive and negative half-periods of voltage supplied to the first coil is done at the zero crossings of the voltage supplied to the first coil.

SUPPRESSION OF CHARGE PUMP VOLTAGE DURING SWITCHING IN A MATRIX CONVERTER

Switches of a matrix converter are protected from potentially damaging charge-pump voltage build-up during a transition (dead) time by pulsing On (temporarily closing) any “at risk” switch during the transition (dead) time. The temporary closing of the “at risk” switch discharges any voltage build-up across a parallel coupled capacitor, which protects the at risk switch from damage or failure. 1. In a matrix converter having a plurality of switches and operating in a free-wheeling mode and a power delivery mode , a method for protecting the switches during a transition period between the free-wheeling mode and the power delivery mode comprising , temporarily closing a particular switch of the plurality of switches that is normally open during the transition period thereby protecting the particular switch during the transition period.2. The method of claim 1 , wherein temporarily closing the particular switch comprises closing the particular switch during a portion of the transition period.3. The method of claim 1 , wherein temporarily closing the particular switch comprises closing the particular switch during approximately all of the transition period.4. The method of claim 1 , wherein temporarily closing the particular switch comprises applying one or more control pulses to the particular switch causing the particular switch to temporarily close during application of the one or more control pulses.5. The method of claim 1 , wherein temporarily closing the particular switch comprises temporarily closing the particular switch for a time period sufficient to discharge a capacitor in parallel with the particular switch.6. In a matrix converter having a plurality of switches and operating in a free-wheeling mode and a power delivery mode claim 1 , a method for protecting the switches during a transition period between the free-wheeling mode and the power delivery mode comprising:determining a particular switch of the plurality of switches being at risk of a charge pump ...

POWER CONVERTER

A motor drive system wherein an LC circuit exists between an inverter and a motor is such that switching of semiconductor switching elements Su to Sw and Sx to Sz configuring the inverter is controlled by an on-signal formed of a first on-signal, a second on-signal, and an off-state period of a time the same as the first on-signal provided between the first on-signal and second on-signal, and by an off-signal formed of a first off-signal, a second off-signal, and an on-state period of a time the same as the first off-signal provided between the first off-signal and second off-signal, and surge voltage applied to an input terminal of the motor is suppressed by the time of the first on-signal and the time of the second off-signal being set to one-sixth of a resonance cycle specific to the LC circuit. 1. A power converter for converting the power received from a power source , and supplying the converted power to a load , comprising:a semiconductor switching element; anda control circuit that controls the turning on and off of the semiconductor switching element;the control circuit providing a control signal for turning the semiconductor switching element into an on-state,whereinthe control signal is configured of a first on-signal and a second on-signal,an off-state period is provided between the first on-signal and second on-signal of the control signal, the off-state period being a time practically equivalent to a period of the first on-signal, andthe period of the first on-signal and the off-state period are set to a time practically one-sixth of a resonance cycle of impedance existing between the semiconductor switching element and the load.2. A power converter for converting the power received from a power source , and supplying the converted power to a load , comprising:a semiconductor switching element;a control circuit that controls the turning on and off of the semiconductor switching element; andan LC circuit formed of an inductor and a capacitor, the ...

REACTIVE ENERGY COMPENSATOR AND ASSOCIATED METHOD FOR BALANCING HALF-BUS VOLTAGES

A reactive energy compensator that can be electrically connected to an AC electrical network, including at least one input direct voltage bus, at least one voltage inverter including switches and first and second capacitors having first and second voltages at their terminals, control means for the switches, including computation means capable of generating a target control current, means for combining the target control current and the output current from the inverter, means for transmitting a control signal capable of driving the switches, and correction means for the control signals of the switches, the correction means being capable of adding a balancing current to the target control current, the balancing current being able to correct the target control current so as to reduce the difference between the values of the first and second voltages, the target control current being increased for an even harmonic of the network frequency. 2. The reactive energy compensator according to claim 1 , wherein the correction means can determine a value of the balancing current claim 1 , the balancing current being a periodic frequency signal equal to a non-zero even multiple of the network frequency.3. The reactive energy compensator according to claim 2 , wherein the balancing current is a sinusoidal frequency signal equal to a non-zero even multiple of the network frequency.4. The reactive energy compensator according to claim 2 , wherein the amplitude of the balancing current is proportional to the difference between the current value of the first voltage and the current value of the second voltage.5. The reactive energy compensator according to claim 1 , wherein each electronic switch is a two-way switch claim 1 , and comprises a transistor and a diode connected in anti-parallel.6. The reactive energy compensator according to claim 5 , wherein the transistor is an insulated gate bipolar transistor.7. The reactive energy compensator according to claim 1 , wherein the ...

Power convertion circuit using high-speed characterisics of switching devices

A power conversion circuit converting DC electric power into AC electric power and sending the AC power to an inductive load, includes a first switching device connected to the DC power supply; a second switching device connected to the DC power supply; a first inductor provided between the first switching device and the inductive load; a second inductor provided between the second switching device and the inductive load; and a clamping diode connected between a first connection point between the first switching device and the first inductor, and a second connection point between the second switching device and the second inductor. When the first and second switching devices are turned off, a current flows through the second diode, clamping diode, first inductor and inductive load to completely flow out a current in the first inductor, and then a current flows through the second diode, second inductor and inductive load.

Power Conversion Device

A power conversion device comprises a power semiconductor device, first and second conductor plates joined to the power semiconductor device, first and second insulating member, a case made of metal which stores the components, and a channel-forming structure made of metal. Part of the case is fixed to the metallic channel-forming structure via a third insulating member. Leakage current caused by the switching operation of the power semiconductor device is transmitted to the channel-forming structure via a series circuit including parasitic capacitance of the first insulating member and/or parasitic capacitance of the second insulating member and parasitic capacitance of the third insulating member. 1. A power conversion device comprising:a power semiconductor device which converts DC current to AC current by switching operation;a first conductor plate joined to one principal surface of the power semiconductor device via a joining material;a second conductor plate joined to the other principal surface of the power semiconductor device via a joining material;a first insulating member facing a surface of the first conductor plate, other surface of the first conductor plate being provided with the power semiconductor device;a second insulating member facing a surface of the second conductor plate, other surface of the second conductor plate being provided with the power semiconductor device;a case made of metal which stores the power semiconductor device, the first and second conductor plates, and the first and second insulating members; anda channel-forming structure made of metal which forms a channel through which a cooling medium flows, wherein:the case is held in the channel of the channel-forming structure by fixing part of the case to the channel-forming structure via a third insulating member, andleakage current caused by the switching operation of the power semiconductor device is transmitted to the channel-forming structure via a series circuit including ...

Power Module Package Having a Multi-Phase Inverter and Power Factor Correction

According to an exemplary implementation, a power module package includes a multi-phase inverter. The power module package also includes a multi-phase inverter driver configured to drive the multi-phase inverter. The power module package further includes a power factor correction (PFC) circuit where the PFC circuit is configured to regulate a bus voltage of the multi-phase inverter and a PFC driver configured to drive the PFC circuit. The multi-phase inverter, the multi-phase inverter driver, the PFC circuit, and the PFC driver are situated on a package substrate of the power module package. The multi-phase inverter driver and the PFC driver can be in a common driver integrated circuit (IC). 1. A power module package comprising:a multi-phase inverter;a multi-phase inverter driver configured to drive said multi-phase inverter;a power factor correction (PFC) circuit, said PFC circuit configured to regulate a bus voltage of said multi-phase inverter;a PFC driver configured to drive said PFC circuit;said multi-phase inverter, said multi-phase inverter driver, said PFC circuit, and said PFC driver situated on a package substrate of said power module package.2. The power module package of claim 1 , wherein said multi-phase inverter driver and said PFC driver are in a common driver integrated circuit (IC).3. The power module package of claim 1 , comprising a PFC overcurrent protection circuit configured to provide over current protection to said PFC circuit.4. The power module package of claim 1 , comprising an inverter overcurrent protection circuit configured to provide over current protection to said multi-phase inverter.5. The power module package of claim 1 , wherein said multi-phase inverter is a three-phase inverter.6. The power module package of claim 1 , comprising a common fault terminal of said power module package configured to indicate an overcurrent condition of said PFC circuit and configured to indicate an overcurrent condition of said multi-phase inverter. ...

AC POWER SUPPLY APPARATUS

In an AC power supply apparatus, first and second switching circuits connected in series to an input terminal to which a DC input power supply is connected include first and second rectification elements, respectively. A capacitor, an inductor, and a capacitive load are equivalently connected in series to the second switching circuit. The capacitor is charged after the first switching circuit is turned on before the second rectification element is turned off and the charged capacitor is caused to discharge after the second switching circuit is turned on before the second rectification element is turned off. The above operations are periodically repeated. The voltage of the capacitive load is reversed with current flowing during the charge and the discharge of the capacitor to adjust the on and off periods of the first and second switching circuits in order to supply desired AC voltage to the capacitive load. 1. An AC power supply apparatus that supplies AC voltage to a capacitive load , the AC power supply apparatus comprising:an input terminal to which a DC power supply is connected;a first switching circuit in which a first switch element is connected in parallel to a first rectification element;a second switching circuit which is connected in series to the first switching circuit and in which a second switch element is connected in parallel to the a second rectification element;a transformer configured to include a primary winding and a secondary winding;a resonant inductor and a resonant capacitor configured to be connected in series to the primary winding; anda control unit configured to repeat first control in which, after the first switch element is turned on during a first period, the first switch element is turned off during a second period and second control in which, after the second switch element is turned on during a third period, the second switch element is turned off during a fourth period,wherein the resonant inductor, the resonant capacitor, and ...

REACTIVE ENERGY COMPENSATOR COMPRISING N PARALLEL INVERTERS, N CAPACITOR BANKS, AND MEANS FOR CONNECTING THE BANKS THROUGH PASSIVE ELECTRICAL COMPONENTS

A reactive energy compensator is provided. The compensator is connected to an alternating electrical network including M phase(s), M being an integer greater than or equal to 1. The compensator includes M connection terminals, N banks of capacitor(s) capable of providing reactive energy, N being an integer greater than or equal to 2, N two-way voltage inverters, connected to each other in parallel and each connected to a unique capacitor bank, each inverter being able to convert a direct current into an alternating current including M phase(s) in one direction and the alternating current into direct current in the other direction, each inverter including first and second input terminals and M output terminal(s), the input terminals being connected to the corresponding capacitor bank, each output terminal corresponding to a phase of the alternating current and being connected to a corresponding connection terminal, and a device for balancing the voltage of the N capacitor banks. 2101834284454. The compensator () according to claim 1 , wherein the balancing device () includes second electrical connecting means () for connecting the second input terminals () through passive electrical components ( claim 1 , ).310323436445254. The compensator () according to or claim 1 , wherein the connecting means ( claim 1 , ) are made up of passive electrical components ( claim 1 , claim 1 , claim 1 , ).4103234. The compensator () according to any one of the preceding claims claim 1 , wherein the connecting means ( claim 1 , ) have an impedance greater than or equal to 10 ohms claim 1 , preferably greater than or equal to 15 ohms.510323636384038264042. The compensator () according to any one of the preceding claims claim 1 , wherein the first connecting means () include N first resistances () claim 1 , each first resistance () having two ends ( claim 1 , ) and being connected by one end () to a first corresponding input terminal () and by the other end () to a first shared point (). ...

POWER CONVERTING APPARATUS AND PHOTOVOLTAIC MODULE

A power converting apparatus and a photovoltaic module are discussed. The power converting apparatus includes a converter including a tapped inductor and a first switch, the converter converting a level of an input direct current (DC) voltage and outputting the level-converted DC voltage, and an inverter including a plurality of switches, the inverter converting the level-converted DC voltage into an alternating current (AC) voltage. The inverter operates separately in a first switching mode where the inverter performs a switching operation at a first frequency for a first period of the converted AC voltage and a second switching mode where the inverter performs a switching operation at a second frequency for a second period of the converted AC voltage, the second frequency being lower than the first frequency. 1. A power converting apparatus comprising:a converter including a tapped inductor and a first switch, the converter configured to convert a level of an input direct current (DC) voltage and output the level-converted DC voltage; andan inverter including a plurality of switches, the inverter configured to convert the level-converted DC voltage into an alternating current (AC) voltage,wherein the inverter operates separately in a first switching mode where the inverter performs a switching operation at a first frequency for a first period of the converted AC voltage and a second switching mode where the inverter performs a switching operation at a second frequency for a second period of the converted AC voltage, the second frequency being lower than the first frequency.2. The power converting apparatus according to claim 1 , wherein the converter converts the level of the input DC voltage to output a level-converted pseudo DC voltage as the level converted DC voltage.3. The power converting apparatus according to claim 1 , further comprising a filter configured to low pass filter the AC voltage output from the inverter.4. The power converting apparatus ...

SOLAR POWER CONVERSION SYSTEM

A power conversion system () for converting power from a plurality of solar panels. The system () comprises a plurality of panel modules () each having an input () and an output () and being connected in series. Each panel module () is connected to at least one solar panel () that supplies power to the panel module (). Voltage control circuitry is provided within each of the panel modules () to vary the voltage supplied between the input () and the output () between a maximum module voltage and a minimum module voltage. A control unit () in communication with the voltage control circuitry of each of the panel modules varies the voltage supplied across the input () and output () of each of the panel modules () such that the total voltage across the series connected panel modules () forms an AC signal or a rectified version of an AC signal. 1. A power conversion system for converting power from a plurality of solar panels , the system comprising:a plurality of panel modules each having an input and an output and being connected in series such that the output of any panel module is connected to the input of a subsequent panel module, each panel module being connected to at least one solar panel that supplies power to the panel module;voltage control circuitry provided within each of the panel modules in connection with the solar panel to vary the voltage supplied between the input and the output by the solar panel between a maximum module voltage and a minimum module voltage;a control unit in communication with the voltage control circuitry of each of the panel modules;wherein the control unit varies the voltage supplied across the input and output of each of the panel modules such that the total voltage across the series connected panel modules forms an AC signal or a rectified version of an AC signal.2. A power conversion system in accordance with claim 1 , wherein the control unit is in communication with a mains supply to receive information regarding the phase of ...

CONVERTER ASSEMBLY AND A POWER PLANT INCLUDING THE CONVERTER ASSEMBLY

A converter assembly includes a DC-DC converter, an inverter, a DC link, an input capacitor, an inductor and a neutral conductor. The DC-DC converter includes at least one DC-DC converter unit. The input capacitor includes an input capacitor unit for each of the at least one DC-DC converter unit, where each of the input capacitor units has a midpoint. The neutral conductor is connected to a neutral point on an output side of the inverter. The inductor includes an inverter side inductor between each output terminal of the inverter means and the neutral point on output side of the inverter. The neutral conductor is connected to the midpoint of each of the input capacitor units. 1. A converter assembly comprising:DC-DC converter means including at least one DC-DC converter unit having input terminals and an output;inverter means having at least one input terminal and at least one output terminal;a DC link electrically connecting the output of the at least one DC-DC converter unit to the at least one input terminal of the inverter means;input capacitor means including an input capacitor unit for a corresponding one of each of the at least one DC-DC converter unit, each input capacitor unit being connected between the input terminals of a corresponding one of the at least one DC-DC converter unit;a neutral conductor connected to a neutral point on an output side of the inverter means; andinductor means including an inverter side inductor between each output terminal of the inverter means and the neutral point on the output side of the inverter means,wherein the neutral conductor is connected to a corresponding midpoint of each of the input capacitor units.2. A converter assembly according to claim 1 , wherein each inverter side inductor is connected in series with a load of the inverter means.3. A converter assembly according to claim 1 , comprising:a neutral point filter capacitor between each output terminal of the inverter means and the neutral point on the output ...

MAXIMUM POWER POINT TRACKER, POWER CONVERSION CONTROLLER, POWER CONVERSION DEVICE HAVING INSULATING STRUCTURE, AND METHOD FOR TRACKING MAXIMUM POWER POINT THEREOF

Disclosed are a maximum power point tracker, a power conversion controller, a power conversion device having an insulating structure, and a method for tracking maximum power point. The power conversion device includes: a DC/AC converter including a primary DC chopper unit having a primary switch, a transformer, and an AC/AC conversion unit including a secondary switch; a current detector detecting current from an input stage of the DC/AC converter and providing a detected current value; a voltage detector detecting a system voltage from an output stage of the DC/AC converter; and a power conversion controller generating a primary PWM signal to be provided to the primary DC chopper unit and secondary first and second PWM signals, having the mutually opposing phases, to be provided to the AC/AC conversion unit by using the detected current value and the system voltage. 19-. (canceled)10. A power conversion device comprising:a DC/AC converter including a primary DC chopper unit having a primary switch, a transformer, and an AC/AC conversion unit including a secondary switch;a current detector detecting current from an input stage of the DC/AC converter and providing a detected current value;a voltage detector detecting a system voltage from an output stage of the DC/AC converter; anda power conversion controller generating a primary pulse width modulation (PWM) signal to be provided to the primary DC chopper unit and secondary first and second PWM signals, having the mutually opposing phases, to be provided to the AC/AC conversion unit by using the detected current value and the system voltage.11. The device of claim 10 , wherein the DC/AC converter comprises:the primary DC chopper unit having the primary switch;the transformer having a primary coil connected between the primary switch and the input stage and a secondary coil; andthe AC/AC conversion unit including a secondary first switch connected to one end of the secondary coil and a secondary second switch ...

POWER MODULE FOR CONVERTING DC TO AC

A power module for converting direct current to alternating current comprising a semiconductor switching circuit device, a substrate onto which the switching circuit device is physically and electrically coupled without wirebonds, a plurality of leadframe terminals physically and electrically coupled to the substrate, and a cover including an opening exposing a bottom side of the substrate and including a wall portion oriented generally orthogonally relative to the substrate with at least some of the leadframe terminals projecting outwardly from the wall portion. The leadframe terminals projecting outwardly from the wall portion may include an affixed portion coupled to the substrate and an extending segment lying in a plane above the affixed portion with the extending segment projecting outwardly from the wall portion and the cover encapsulating the affixed portion whereby the extending segment is spaced from a plane defined by the bottom side of the substrate. 1. A power module for converting direct current to alternating current , said power module comprising:a semiconductor switching circuit device;a substrate onto which said switching circuit device is physically and electrically coupled without wirebonds;a plurality of leadframe terminals physically and electrically coupled to said substrate; anda cover at least partially disposed about said power module, said cover including an opening exposing a bottom side of said substrate and including a wall portion oriented generally orthogonally relative to said substrate with at least some of said leadframe terminals projecting outwardly from said wall portion;said leadframe terminals projecting outwardly from said wall portion including an affixed portion coupled to said substrate and an extending segment lying in a plane above said affixed portion, said extending segment projecting outwardly from said wall portion with said cover encapsulating said affixed portion whereby said extending segment is spaced from a ...

VOLTAGE OUTPUT CIRCUIT, LOAD DRIVE CIRCUIT, AND METHOD FOR OUTPUTTING VOLTAGE

A voltage output circuit includes: an oscillator circuit configured to output an oscillation signal while changing an oscillation frequency thereof; and a voltage generating circuit configured to convert a first voltage into a second voltage higher than the first voltage, and output the second voltage, based on the oscillation signal. 1. A voltage output circuit comprising:an oscillator circuit configured to output an oscillation signal while changing an oscillation frequency thereof; anda voltage generating circuit configured to convert a first voltage into a second voltage higher than the first voltage, and output the second voltage, based on the oscillation signal.2. The voltage output circuit of claim 1 , whereinthe oscillator circuit is further configured to output the oscillation signal having the oscillation frequency determined according to a level of an applied voltage.3. The voltage output circuit of claim 2 , whereinthe oscillator circuit is further configured to increase the oscillation frequency of the oscillation signal with increase in level of the applied voltage, and decrease the oscillation frequency of the oscillation signal with decrease in level of the applied voltage.4. The voltage output circuit of claim 3 , whereinthe oscillator circuit includes an odd number of a plurality of inverter circuits ring-connected, and whereinthe plurality of inverter circuits each have a response time decreased with increase in level of the applied voltage, which response time is a time period from when an input voltage is inverted until when an output voltage is inverted, and has the response time increased with decrease in level of the applied voltage.5. The voltage output circuit of claim 4 , whereinthe plurality of inverter circuits each include first and second NMOSFETs and first and second PMOSFETs, whereinthe first NMOSFET and the first PMOSFET are inverter-connected to each other, whereinthe second NMOSFET is connected in series between a power supply and ...

ELECTRIC POWER CONVERTER

An electric power converter includes a DC stabilization circuit () configured to stabilize a DC voltage from DC power supply (), and an inverter () configured to convert the DC voltage stabilized by the DC stabilization circuit () to an AC voltage. The DC stabilization circuit () includes an aluminum electrolytic capacitor () configured to smooth the DC voltage, a saturable reactor () configured to prevent the DC stabilization circuit () from oscillating, and a film capacitor () configured to supply a ripple current to the inverter (). 1. An electric power converter configured to convert DC power to AC power , comprising:a DC stabilization circuit configured to stabilize a DC voltage from DC power supply; andan inverter configured to convert the DC voltage stabilized by said DC stabilization circuit to an AC voltage, an input terminal configured to receive the DC voltage from said DC power supply;', 'a DC output terminal connected to said inverter;', 'a power storage device connected to said input terminal and configured to smooth the DC voltage of said input terminal;', 'a reactor having one terminal connected to said input terminal and the other terminal connected to said DC output terminal and being configured to prevent said DC stabilization circuit from oscillating; and', 'a film capacitor connected to said DC output terminal and configured to supply a ripple current to said inverter., 'said DC stabilization circuit including2. The electric power converter according to claim 1 , wherein said power storage device is an electrolytic capacitor.3. The electric power converter according to claim 1 , wherein said power storage device is an electric double layer capacitor.4. The electric power converter according to claim 1 , wherein said power storage device is a battery.5. The electric power converter according to claim 1 , wherein said reactor is a saturable reactor.6. The electric power converter according to claim 1 , wherein said DC stabilization circuit further ...

CURRENT-SOURCE POWER CONVERTING APPARATUS

A current-source power converting apparatus according to an embodiment includes an inverter and a drive controller. The inverter includes, in every output phase, a plurality of switching elements that are serially connected between the positive pole and the negative pole of a direct current source. The drive controller controls the inverter in accordance with a current command in an output mode of controlling the switching elements of different output phases for supplying current between the output phases and a short circuit mode of controlling the switching elements of the same output phase. An output phase in which the drive controller executes the short circuit mode is an output phase whose phase voltage or phase current has the minimum absolute value. 1. A current-source power converting apparatus comprising:an inverter including, in every output phase, a plurality of switching elements that are serially connected between a positive pole and a negative pole of a direct current source; anda drive controller that controls the inverter in accordance with a current command in an output mode of controlling the switching elements of different output phases for supplying current between the output phases and a short circuit mode of controlling the switching elements of the same output phase,wherein an output phase in which the drive controller executes the short circuit mode is, among the output phases, an output phase whose phase voltage or phase current has a minimum absolute value.2. The current-source power converting apparatus according to claim 1 , a voltage detector that detects voltages of the individual output phases, and', 'a determiner that determines, on the basis of the voltages detected by the voltage detector, an output phase with a minimum absolute value of a phase voltage, and, 'wherein the drive controller includes'}wherein the output phase in which the drive controller executes the short circuit mode is the output phase determined by the determiner ...

POWER MODULE

A power module according to the present invention includes a semiconductor device; a base part formed from an electrically conductive material on which the semiconductor device is mounted; a signal lead part formed from the same material as the base part, the signal lead part being electrically connected to the semiconductor device; and a thin plate lead part formed from the same material as the base part such that it is formed seamlessly from the base part and it is thinner than the base part, the thin plate lead part extending on the same side as the signal lead part with respect to the base part, wherein the thin plate lead part is electrically connected to a predetermined terminal of the semiconductor device via the base part such that it forms a potential detecting terminal for detecting a potential of the predetermined terminal of the semiconductor device. 1. A power module comprising:a semiconductor device;a base part formed from an electrically conductive material on which the semiconductor device is mounted;a signal lead part formed from the same material as the base part, the signal lead part being electrically connected to the semiconductor device;a thin plate lead part formed from the same material as the base part such that it is formed seamlessly from the base part and it is thinner than the base part, the thin plate lead part extending on the same side as the signal lead part with respect to the base part; anda power lead part formed from the same material as the base part such that it is formed seamlessly from the base part and it is thinner than the base part, the power lead part connecting a predetermined terminal of the semiconductor device to a positive electrode side of a power supply, whereinthe thin plate lead part is electrically connected to a predetermined terminal of the semiconductor device via the base part such that it forms a potential detecting terminal for detecting a potential of the predetermined terminal of the semiconductor ...

SWITCHING POWER SUPPLY DEVICE

A switching power supply device includes: a chopper circuit that adjusts a DC voltage input through a reactor to a desired DC voltage by performing an on/off operation of a switching element; an inverter circuit that converts an output of the chopper circuit into a desired AC voltage; a first capacitor that is provided on a side of the inverter circuit relative to the switching element; a second capacitor that is provided on a side of the inverter circuit relative to the switching element; and a resistor that is in a resonant loop formed by three constituent elements that are the first capacitor, the second capacitor, and a wiring inductance between the chopper circuit and the inverter circuit, where the resistor is connected in series to the second capacitor and inserted between the DC bus-bars. 19-. (canceled)10. A switching power supply device comprising:a chopper circuit that adjusts a DC voltage input through a reactor to a desired DC voltage by performing an on/off operation of a switching element;an inverter circuit that converts an output of the chopper circuit into a desired AC voltage;a first capacitor that is provided on a side of the inverter circuit relative to the switching element and that is inserted between DC bus-bars that connect the chopper circuit and the inverter circuit;a second capacitor that is provided on a side of the inverter circuit relative to the switching element and that is connected in parallel to the first capacitor and has a smaller capacitance value than the first capacitor; anda resistor that is in a resonant loop formed by three constituent elements that are the first capacitor, the second capacitor, and a wiring inductance between the chopper circuit and the inverter circuit, where the resistor is connected in series to the second capacitor and inserted between the DC bus-bars.11. The switching power supply device according to claim 10 , wherein the second capacitor is a smoothing capacitor that smoothes an output of the ...

Method for Connecting a Photovoltaic Installation to a Power Supply

The disclosure relates to a method for connecting a photovoltaic installation to a power supply grid, the photovoltaic installation comprising a photovoltaic generator, a direct voltage intermediate circuit with at least one capacitor, and an inverter. The method including connecting the direct voltage intermediate circuit to the photovoltaic generator and the capacitor is pre-charged to a first voltage. The direct voltage intermediate circuit is then separated from the photovoltaic generator and the capacitor is discharged to or below a second voltage that corresponds to a maximum operating voltage of the inverter. The inverter is then connected to the power supply grid, an inverter bridge of the inverter is clocked, and the direct voltage intermediate circuit is connected to the photovoltaic generator. 1. A method for connecting a photovoltaic installation to a power supply grid , the photovoltaic installation comprising a photovoltaic generator , a direct voltage intermediate circuit with at least one capacitor , and an inverter , comprising:connecting the direct voltage intermediate circuit to the photovoltaic generator and the at least one capacitor is pre-charged to a first voltage that is greater than a second voltage that corresponds to a maximum operating voltage of the inverter;disconnecting the direct voltage intermediate circuit from the photovoltaic generator after the connecting, wherein the at least one capacitor is discharged to or below the second voltage;connecting the inverter to the power supply grid after disconnecting the direct voltage intermediate circuit from the photovoltaic generator;clocking an inverter bridge of the inverter after connecting the inverter to the power supply grid; andconnecting the direct voltage intermediate circuit to the photovoltaic generator after clocking the inverter bridge.2. The method according to claim 1 , wherein the first voltage is greater than a rectifier voltage of the power supply grid.3. The method ...

ARRANGEMENT FOR TRANSMITTING POWER BETWEEN A DC POWER LINE AND AN AC POWER LINE

An arrangement transmits power between a DC power line and an AC power line carrying a voltage having a number of phases. The arrangement includes a number of transformers, one for each phase and a number of power transfer modules, one for each phase, connected in series between the DC power line and ground, where each module includes a first branch including series connected converter cells and a second branch including series connected switching elements. The primary winding of a transformer is connected to a corresponding AC phase conductor of the AC power line and the secondary winding is connected between a midpoint of the first branch and a midpoint of the second branch of a corresponding power transfer module. 19.-. (canceled)10. Arrangement for transmitting power between a direct current power line and an alternating current power line carrying a voltage having a number of phases , said arrangement comprising:a number of transformers, one for each phase,a number of power transfer modules, one for each phase, connected in series between the direct current power line and ground or a negative direct current bus, where each module comprisesa first branch including cascaded converter cells, the cells comprising an energy storage element connected in parallel with a first group of switching units, wherein all the cells providing a voltage contribution of the module is provided in this first branch, anda second branch comprising series connected switching elements,wherein the branches are connected in parallel between a first and a second connection point of a module, the primary winding of a transformer is connected to a corresponding alternating current phase conductor of the alternating current power line and the secondary winding is connected between a midpoint of the first branch and a midpoint of the second branch of a corresponding power transfer module.11. Arrangement according to claim 10 , wherein each module further comprises a capacitor in parallel with ...

APPARATUS FOR CONTROLLING VOLTAGE CONVERTING APPARATUS

An apparatus for controlling a voltage converting apparatus controls a voltage converting apparatus capable of performing one-arm drive using either a first arm or a second arm by alternatively switching on a first switching element and a second switching element each of which is connected to a reactor in series. The apparatus for controlling the voltage converting apparatus is provided with: a current detecting device for detecting a reactor current; an average value estimating device for estimating an average value of the reactor current in units of periods of a gate signal for changing on and off of each of the first switching element and the second switching element, by using the detected reactor current; and a controlling device for controlling operation of the voltage converting apparatus on the basis of the estimated average value of the reactor current. 1. An apparatus for controlling a voltage converting apparatus capable of performing one-arm drive using either a first arm including a first switching element or a second arm including a second switching element by alternatively switching on the first switching element and the second switching element each of which is connected to a reactor in series , said apparatus comprising:a current detecting device for detecting a reactor current which is an electric current flowing through the reactor;an average value estimating device for estimating an average value of the reactor current in units of periods of a gate signal for changing on and off of each of the first switching element and the second switching element, by using the detected reactor current; anda controlling device for controlling operation of the voltage converting apparatus on the basis of the estimated average value of the reactor current.2. The apparatus for controlling the voltage converting apparatus according to claim 1 , wherein said average value estimating device has:a first current amount calculating device for calculating a first current ...

METHOD AND CONTROL UNIT FOR THE PULSE-WIDTH-MODULATED CONTROL OF SWITCHING ELEMENTS OF A PULSE-CONTROLLED INVERTER

A method is described for the pulse-width-modulated control of switching elements of a pulse-controlled inverter, the impulses of successive signal periods of the control signal, in a first control mode, respectively having a uniform start or end time within the signal period, or being situated uniformly centered in the middle of the signal period, and the impulses of successive signal periods of the control signal, in a second control mode, being situated alternately at the beginning of the signal period and at the end of the signal period. 14.-. (canceled)5. A method for a pulse-width-modulated control of switching elements of a pulse-controlled inverter , comprising: respectively have one of a uniform start time and an end time within each signal period, and', 'are uniformly centered in a middle of at least one signal period; and, 'in a first control mode, providing impulses for successive signal periods of a control signal, wherein the impulses one ofin a second control mode, alternately situating the impulses of the successive signal periods of the control signal at a beginning of the signal period and at an end of the signal period.6. The method as recited in claim 5 , wherein a duty factor of the impulses of the successive signal periods of the control signal is variable.7. The method as recited in claim 5 , further comprising:switching between the first control mode and the second control mode while the pulse-controlled inverter is in operation.8. A control unit for a pulse-width-modulated control of switching elements of a pulse-controlled inverter claim 5 , comprising: respectively have one of a uniform start time and an end time within each signal period, and', 'are uniformly centered in a middle of at least one signal period; and, 'an arrangement for, in a first control mode, providing impulses for successive signal periods of a control signal, wherein the impulses one ofan arrangement for, in a second control mode, alternately situating the impulses of ...

POWER CONVERTER

A power module includes a power module body portion. The power module body portion includes a P-side conductive plate, a first N-side conductive plate, and a second N-side conductive plate that are disposed with a distance thereamong in the power module body portion, P-side semiconductor elements that are disposed on a front surface of the P-side conductive plate, N-side semiconductor elements that are disposed on a front surface of the first N-side conductive plate and that are electrically connected to the P-side semiconductor elements, and a capacitor that is disposed between the P-side semiconductor elements and the N-side semiconductor elements so as to be connected to the P-side conductive plate and the second N-side conductive plate in the power module body portion and that suppresses a surge voltage. 1. A power converter comprising:a power converter body portion, a first conductive plate and a second conductive plate that are disposed with a distance therebetween in the power converter body portion,', 'a first power-conversion semiconductor element that is disposed on a front surface of the first conductive plate,', 'a second power-conversion semiconductor element that is disposed on a front surface of the second conductive plate and that is electrically connected to the first power-conversion semiconductor element, and', 'a capacitor that is disposed between the first power-conversion semiconductor element and the second power-conversion semiconductor element so as to be connected to the first conductive plate and the second conductive plate in the power converter body portion and that suppresses a surge voltage., 'the power converter body portion including'}2. The power converter according to claim 1 , wherein the capacitor is disposed between the first power-conversion semiconductor element and the second power-conversion semiconductor element so as to be directly connected to the first conductive plate and the second conductive plate.3. The power ...

HIGH-FREQUENCY POWER SUPPLY

A high-frequency power supply apparatus for supplying high-frequency power to a load the impedance of which greatly fluctuates is provided, wherein a stable high-frequency current is always maintained without having overcurrent or overvoltage generated in a drive circuit thereof. In the high-frequency power supply apparatus, a constant-current conversion circuit is connected between an LCR series resonant circuit and a half-bridge drive circuit, high-frequency current of the LCR series resonant circuit is controlled by the voltage of the half-bridge drive circuit, and a constant-current function is applied to impedance variation of the load. Due to the constant-current conversion circuit, the gate of a MOSFET of the half-bridge drive circuit is driven with a parallel capacitor using a transformer inserted in the LCR series resonant circuit, and the phases of the high-frequency current of the LCR series resonant circuit and the output of the half-bridge drive circuit are maintained to be constant. 1. A high-frequency power supply , comprising:a direct current voltage source;at least one half-bridge drive circuit;a constant-current conversion circuit, anda series resonant circuit,wherein the direct current voltage source controls voltage of the at least one half-bridge drive circuit; the at least one half-bridge drive circuit comprises at least one pair of semiconductor switching elements, a control terminal of each of the semiconductor switching elements is connected to a secondary winding of a transformer for switching alternately between an ON state and an OFF state;the series resonant circuit comprises an induction coil, at least one capacitor and primary windings of the transformers connected in series, and a sum of reactance at a specific resonant frequency ω becomes zero; andthe constant-current conversion circuit is a T-type constant-current conversion circuit or a π-type constant-current conversion circuit at the specific resonant frequency ω.2. The high- ...

SWITCHING CONTROL CIRCUIT WITH SIGNAL PROCESS TO ACCOMMODATE THE SYNCHRONOUS RECTIFIER OF POWER CONVERTERS

A switching control circuit of a power converter according to the present invention comprises an input circuit and a clock generator. The input circuit is coupled to receive a feedback signal for generating a switching signal. The clock generator generates a clock signal to determine a switching frequency of the switching signal. The feedback signal is correlated to an output of the power converter. The switching signal is coupled to switch a transformer of the power converter for regulating the output of the power converter. The pulse width of the switching signal is reduced before the switching frequency of the switching signal is changed from a low frequency to a high frequency. 1. A switching control circuit of a power converter , comprising:an input circuit coupled to receive a feedback signal for generating a switching signal; anda clock generator generating a clock signal to determine a switching frequency of the switching signal;wherein the feedback signal is correlated to an output of the power converter; the switching signal is coupled to switch a transformer of the power converter for regulating the output of the power converter; the pulse width of the switching signal is reduced before the switching frequency of the switching signal is changed from a low frequency to a high frequency.2. The circuit as claimed in claim 1 , wherein the pulse width of the switching signal is reduced before the switching signal is disabled.3. The circuit as claimed in claim 1 , wherein the pulse width of the switching signal is decreased to a specific value before the switching signal is disabled for the protection of the power converter.4. The circuit as claimed in claim 1 , wherein the input circuit further comprises a micro-stepping circuit to modulate the pulse width of the switching signal step by step in response to the feedback signal.5. The circuit as claimed in claim 4 , wherein the input circuit further comprises a feedback circuit claim 4 , the feedback circuit ...

CIRCUIT DEVICE

A compact circuit device wherein a semiconductor element that performs high current switching is embedded is provided. A lead () and lead () though which high current passes are disposed superimposed on the upper surface of a circuit board (). Also, a plurality of ceramic substrates (A-F) are affixed to the circuit board (), and transistors, diodes, or resistors are mounted to the upper surface of the ceramic substrates. Furthermore, the circuit elements such as the transistors or diodes are connected to the lead () or the other lead () via fine metal wires. 1. A circuit device , comprising:a circuit board;a semiconductor element disposed on an upper surface of the circuit board;a first lead electrically connected to the semiconductor element, on the upper surface of the circuit board; anda second lead electrically connected to the semiconductor element, at least a part of the second lead being superimposed on the first lead.2. The circuit device according to claim 1 , whereinthe semiconductor element includes a first transistor and a second transistor connected to each other, andthe first transistor and the second transistor are disposed in positions opposed to each other across the first lead and the second lead.3. The circuit device according to claim 1 , wherein the first transistor and the second transistor are connected to each other through a fine metal wire formed above the first lead and second lead.4. The circuit device according to claim 1 , further comprising a frame-shaped case material assembled onto the upper surface of the circuit board claim 1 , whereinthe first lead and the second lead in a state being incorporated in the case material are disposed on the upper surface of the circuit board.5. The circuit device according to claim 4 , wherein the first lead and the second lead are insulated from the circuit board by a resin material constituting the case material.6. The circuit device according to claim 1 , whereinthe circuit board is a substrate ...

ADJUSTABLE SPEED DRIVE LIFETIME IMPROVEMENT SYSTEM

The present techniques include methods and systems for operating an inverter to maintain a lifespan of the inverter. In some embodiments, the switching frequency and/or the output current of the inverter may be changed such that stress may be reduced on the inverter bond wires of the inverter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the inverter and determining whether the operating conditions result in aging the inverter to a point which reduces the inverter lifespan below a desired lifespan. If the operating conditions reduce the inverter lifespan below the desired lifespan, the switching frequency may be reduced to a lower or minimum switching frequency of the inverter and/or the output current of the inverter may be reduced to a maximum output current at the minimum switching frequency. 19.-. (canceled)10. A system , comprising:a generator;a converter coupled to the generator;an inverter coupled to the converter, wherein the inverter comprises a plurality of transistors; anda processor coupled to the inverter, wherein the processor is configured to calculate a failure parameter of the inverter and to change a command switching frequency and an output current of the plurality of transistors.11. The system of claim 10 , wherein the generator is a doubly-fed induction generator (DFIG).12. The system of claim 10 , wherein the plurality of transistors comprises a plurality of insulated gate bipolar transistors (IGBTs).13. The system of claim 12 , wherein the plurality of transistors comprises a plurality of diodes configured antiparallel to the plurality of IGBTs.14. The system of claim 10 , wherein the processor is configured to calculate a number of cycles to failure of the inverter and an aging per second of an operating parameter of the inverter to calculate the failure parameter of the inverter.15. The system of claim 10 , wherein the processor is configured to compare the failure parameter with ...

COMPOSITE MATERIAL, REACTOR-USE CORE, REACTOR, CONVERTER, AND POWER CONVERTER APPARATUS

A reactor of the present invention includes a coil and a magnetic core disposed inside and outside the coil to form a closed magnetic path. At least part of the magnetic core is made of a composite material containing a magnetic substance powder made of an identical material and a resin containing the powder being dispersed therein. In the particle size distribution of the magnetic substance powder, a plurality of peaks are present. That is, the magnetic substance powder contains both a fine powder and a coarse powder at high frequencies. Since the composite material contains the fine powder, it can reduce the eddy current loss, and hence achieves to be a low-loss material. Thanks to the mixed powder including the fine powder and the coarse powder, the packing density of the magnetic substance powder is increased. Thus, the composite material exhibits a high saturation magnetic flux density. By employing such a mixed powder, the raw material powder can be handled with ease, and excellent manufacturability of the composite material is obtained. 1. A composite material containing a magnetic substance powder and a resin containing the powder being dispersed therein , whereinthe magnetic substance powder is made of a plurality of particles made of an identical material, anda plurality of peaks are present in a particle size distribution of the magnetic substance powder.2. The composite material according to claim 1 , whereinthe composite material contains a non-magnetic substance powder made of at least one type of material, andin a particle size distribution of mixed powder made up of the magnetic substance powder and the non-magnetic substance powder, a maximum particle size with which a peak of the non-magnetic substance powder appears is smaller than a minimum particle size with which a peak of the magnetic substance powder appears.3. The composite material according to claim 2 , whereina particle size with which the peak of the non-magnetic substance powder appears ...

NEAR ZERO CURRENT-RIPPLE INVERSION OR RECTIFICATION CIRCUITS

The present invention relates to a near zero current-ripple inversion circuit including top and bottom cells, a transformer (T) comprising primary windings (P, P) and a secondary winding (S), and at least one middle cell connected in series between the top and bottom cells. The top cell comprises two capacitors (C, C) and a switch (Q) each connecting to the middle cell, and an inductor (Lr) and the primary winding (P) connected in series between the capacitor (C) and switch (Q), wherein the switch (Q) is connected to the capacitors (C, C) respectively. The bottom cell comprises a capacitor (C) and a switch (Q) each connecting to the middle cell, and an inductor (Lr) and the primary winding (P) connected in series between the capacitor (C) and switch (Q), wherein the primary winding (P) is connected to the middle cell, and the capacitor (C) and switch (Q) are connected. 1. A power inversion circuit for converting a DC voltage received at a DC input to an AC voltage , which is paralleled-connected with the DC input and includes:a top-cell comprising a first clamping capacitor, a second clamping capacitor, a first switch, and a first inductor and a first primary winding connected in series between a first node of the first clamping capacitor and a top node of the first switch, wherein a first node of the second clamping capacitor and the top node of the first switch are connected together;a bottom-cell comprising a third clamping capacitor and a second switch, and a second inductor and a second primary winding connected in series between a second node of the third clamping capacitor and a bottom node of the second switch;a transformer includes the first and second primary windings and at least one secondary winding, wherein the first and second primary windings each has identical turns; andat least one middle-cell connected in series between the top and bottom cells and each comprising a fourth clamping capacitor, a fifth clamping capacitor, a third switch and a fourth ...

POWER CONVERTER AND MATRIX CONVERTER

The number of ICs used for a power converter is reduced. The power converter includes n power transistors each having an emitter terminal or a source terminal connected to a common line, and driver ICs. Each of the driver ICs includes n pre-drivers that drive the respective n power transistors, and a receiver circuit that is integrated monolithically with the n pre-drivers. The receiver circuit is coupled with a transmitter circuit by AC coupling, and outputs a control signal that controls the n pre-drivers in response to a signal received from the transmitter circuit. 1. A power converter comprising:n power transistors each having an emitter terminal or a source terminal connected to a common line; anda driver,wherein the driver includes:n pre-drivers that drive gate terminals of the respective n power transistors; anda receiver integrated monolithically with the n pre-drivers,wherein the receiver is coupled with a transmitter by AC coupling, and outputs a control signal that controls the n pre-drivers in response to a signal received from the transmitter.2. The power converter according to claim 1 ,wherein circuit grounds of the n pre-drivers and the receiver are connected to the common line.3. The power converter according to claim 2 ,wherein a circuit ground of the transmitter is isolated from a circuit grounds of the n pre-drivers and the receiver.4. The power converter according to claim 1 ,wherein the transmitter subjects a parallel control signal which is input in parallel to parallel-to-serial conversion to generate a serial control signal, andwherein the receiver receives the serial control signal through the AC coupling, and subjects the serial control signal to serial-to-parallel conversion to control the n pre-drivers.5. The power converter according to claim 1 ,wherein the receiver includes a protection circuit that generates the control signal for controlling the n pre-drivers so that two or more of the n power transistors do not turn on at the same ...

POWER CONVERSION APPARATUS

Technology leading to a size reduction in a power conversion apparatus comprising a cooling function and technology relating to enhancing productivity and enhancing reliability necessary for commercial production are provided. Series circuits comprising an upper arm and lower arm of an inverter circuit are built in a single semiconductor module . The semiconductor module has cooling metal on two sides. An upper arm semiconductor chip and lower arm semiconductor chip are wedged between the cooling metals. The semiconductor module is inserted inside a channel case main unit . A DC positive electrode terminal , a DC negative electrode terminal , and an alternating current terminal of a semiconductor chip are disposed in the semiconductor module. The DC terminals and are electrically connected with a terminal of a capacitor module. The alternating current terminal is electrically connected with a motor generator via an AC connector. 1. A power conversion apparatus , having:a channel case having cooling channels;a plurality of semiconductor modules having a DC positive electrode terminal, a DC negative electrode terminal, and an alternating current terminal; anda capacitor module having a capacitor built therein, wherein:in the channel case, a plurality of openings that respectively communicate with the cooling channels are formed;the plurality of semiconductor modules are respectively inserted into the plurality of openings and disposed in the channel case;the capacitor module is disposed on one side of the plurality of semiconductor modules such that a longitudinal side of the capacitor module becomes parallel to the arrangement direction of the plurality of semiconductor modules;the capacitor module has a plurality of capacitor terminals disposed along the longitudinal side of the capacitor module; andthe DC positive electrode terminal and the DC negative electrode terminal of the semiconductor module are disposed closer to the capacitor module than the alternating ...

SEMICONDUCTOR DEVICE, INVERTER DEVICE PROVIDED WITH SEMICONDUCTOR DEVICE, AND IN-VEHICLE ROTATING ELECTRICAL MACHINE PROVIDED WITH SEMICONDUCTOR DEVICE AND INVERTER DEVICE

Provided is a semiconductor device including: a first MOS-FET () joined to a first base plate () via solder (); a second MOS-FET () joined to a second base plate () via solder (); a first lead () joining the first base plate () and the second MOS-FET (); and a second lead () joining the second MOS-FET () and a current path member () that gives and receives current flowing through the MOS-FETs () to and from the outside. The second base plate () is more rigid than both the leads (), a boundary line (D-D) intersects the second base plate () without intersecting both the leads (), the boundary line including a gap portion () along which both the MOS-FETs () are opposed to each other, extending in the direction in which both the MOS-FETs () are not opposed to each other. 1. A semiconductor device , comprising:a first base plate comprising a conductor;a first semiconductor element having a first electrode surface that is electrically joined onto the first base plate via a joining material;a second base plate comprising a conductor, the second base plate being away from the first base plate;a second semiconductor element that is adjacent to the first semiconductor element and has a first electrode surface that is electrically joined onto the second base plate via a joining material;a first lead for electrically joining a second electrode surface of the first semiconductor element and the second base plate via a joining material;a current path member for giving and receiving current flowing through both the first semiconductor element and the second semiconductor element to and from outside, the current path member being away from both the first base plate and the second base plate;a second lead for electrically joining a second electrode surface of the second semiconductor element and the current path member via a joining material; anda sealing material for sealing at least the respective structural members, wherein:a rigidity of the second base plate is higher than a ...

POWER CONVERSION APPARATUS

A filter capacitor accumulating direct-current power and a semiconductor device module performing a switching operation that converts the direct-current power accumulated in the filter capacitor to alternating-current power are electrically connected with each other through a laminated bus bar. The laminated bus bar has a first bus bar and a second bus bar in which a plurality of connection conductors are laminated through an insulator. The second bus bar is provided with heat radiating portions that are formed by exposing a part of the conductor in each flat plate surface. 1. A power conversion apparatus having a configuration in which a filter capacitor accumulating direct-current power and a semiconductor device module performing a switching operation that converts the direct-current power accumulated in the filter capacitor to alternating-current power are electrically connected with each other through a laminated bus bar ,wherein the laminated bus bar, in which a plurality of connection conductors are laminated through an insulator, has a heat radiating portion formed by exposing a conductor in a part of an area other than respective areas connecting to the semiconductor device module and the filter capacitor, andevery surface of the exposed conductor of the heat radiating portion is formed to be along a vertical direction.2. (canceled)3. The power conversion apparatus according to claim 1 , wherein a surface of the exposed conductor of the heat radiating portion is formed on a surface of a flat plate of the laminated bus bar.4. The power conversion apparatus according to claim 3 , wherein every surface of the flat plate of the laminated bus bar is a surface along a vertical direction.5. The power conversion apparatus according to claim 4 , wherein the laminated bus bar has a first bus bar electrically connected to the semiconductor device module and a second bus bar electrically connected to the filter capacitor claim 4 , and the first bus bar and the second ...

Electric Power Converter

There is provided a technology for realizing a low-cost electric power converter operating at low noise under a high-temperature environment. The electric power converter is provided with an enclosure, a power module including a switching element, a driver circuit for generating a signal for driving the switching element, a control circuit board for generating an actuating signal to be sent out to the driver circuit, a base plate with the control circuit board mounted thereon, and a connection part for connecting between the enclosure and the control circuit board. The enclosure is provided with two openings adjacent to each other, and the base plate or the opening of the enclosure is provided with the connection part. 1. An electric power converter comprising:an enclosure;a power module configured by including a switching element;a driver circuit that generates a signal for driving the switching element;a control circuit board that generates an actuating signal to be sent out to the driver circuit;a base plate with the control circuit board mounted thereon; anda connection part that connects between the enclosure and the control circuit board,wherein two openings adjacent to each other are provided between the base plate and the enclosure, andwherein the connection part is provided at one side of the base plate, common to the two openings adjacent to each other.2. The electric power converter according to claim 1 , wherein the connection part is provided at a position where induced currents of the base plate cancel each other out.3. The electric power converter according to claim 1 , wherein a groove is provided at a position symmetrical with respect to the two openings adjacent to each other.4. The electric power converter according to claim 1 , wherein a part of a peripheral edge around the two openings adjacent to each other is an insulator.5. The electric power converter according to claim 1 , wherein the two openings adjacent to each other are each made up of ...

ELECTRIC POWER SUPPLY APPARATUS

A control device of an electric power supply apparatus controls a voltage applied to an inverter to fall within a voltage range between a first voltage that is the voltage of one of a first electric power supply and a second electric power supply and a second voltage that is the sum of the voltage of the first electric power supply and the voltage of the second electric power supply, by alternately switching between a series state in which a current loop that connects the first electric power supply, the second electric power supply, and a reactor in series with the inverter is formed, and a parallel state in which the first electric power supply and the second electric power supply are connected in parallel with the inverter as an electric load. 1. A electric power supply apparatus comprising:a first electric power supply that is connected between a first node and a second node;a second electric power supply that is connected between a third node and a fourth node;a switch circuit having at least four input terminals, each of which is connected to the first node, the second node, the third node, and the fourth node, and having at least two output terminals;an electric load that is connected between the two output terminals;a reactor that is provided at least any one of between the first electric power supply and one of the first node and the second node, and between the second electric power supply and one of the third node and the fourth node;and a voltage control section that alternately switches between:(A) a series state in which a voltage between both ends of the reactor is increased by connecting the first node with the fourth node, connecting the second node with a first output terminal, and connecting the third node with a second output terminal, to form a current loop that connects the first electric power supply, the second electric power supply, and the reactor in series with the electric load, and(B) a parallel state in which the voltage between both ...

SEMICONDUCTOR DEVICE AND POWER CONVERSION DEVICE USING SAME

It is intended to provide a semiconductor device capable to improve a controllability of dv/dt by a gate drive circuit during a turn-on switching period, while maintaining a low loss and a high breakdown voltage. Trench gates are disposed so as to have narrow distance regions and wide distance regions, wherein each of the narrow distance regions is provided with a channel region, and each of the wide distance regions is provided with trenches, each trench having an electrode electrically connected to the emitter electrode. In this manner, even if a floating-p layer is removed, it is possible to reduce a feedback capacity and maintain a breakdown voltage. 2. The semiconductor device claim 1 , according to claim 1 , further comprising:a fourth electrode that is disposed below the gate electrode in the first trench, having a third insulation film between itself and a trench sidewall, and electrically connected to the second electrode.3. The semiconductor device claim 1 , according to claim 1 , 'a thickness of the second insulation film is thicker than a thickness of the first insulation film.', 'wherein'}4. The semiconductor device claim 2 , according to claim 2 , 'thicknesses of the second and third insulation films are thicker than a thickness of the first insulation film.', 'wherein'}5. The semiconductor device claim 1 , according to claim 1 , 'a distance between the second trench closest to the first trench, and the first trench is equal to or smaller than a distance between the first trenches in the first region.', 'wherein'}6. The semiconductor device claim 1 , according to claim 1 , 'a fifth semiconductor layer, in a floating state, of the second conductivity type, between the second trenches.', 'wherein the second region is further provided with'}7. The semiconductor device claim 6 , according to claim 6 , 'a deepness of the fifth semiconductor layer is deeper than a deepness of the second trench.', 'wherein'}8. The semiconductor device claim 1 , according to ...

POWER CONVERSION FOR DISTRIBUTED DC SOURCE ARRAY

Embodiments related to the conversion of DC power to AC power are disclosed. For example, one disclosed embodiment provides a power conversion system, comprising a plurality of direct current (DC) power sources, a plurality of power output circuits connected to one another in a parallel arrangement, each power output circuit being connected to a corresponding DC power source to receive power from the corresponding DC power source and to selectively discharge power received from the corresponding DC power source, a power combiner configured to combine power received from the plurality of power output circuits to form a combined power signal, an output stage configured to convert the combined power signal into an AC signal or a DC signal, and a controller in electrical communication with each power outlet circuit and the power combiner to control the output of power by the power converter. 1. A power conversion system , comprising:a plurality of direct current (DC) power sources;a plurality of energy packet generators, each energy packet generator being connected to a corresponding DC power source to receive power from the corresponding DC power source and to selectively generate an electrical energy packet;an energy packet combiner configured to combine electrical energy packets from the plurality of energy packet generators; anda controller in electrical communication with each energy packet generator and the energy packet combiner to control the generation and combination of electrical energy packets.2. The power conversion system of claim 1 , wherein each DC power source comprises one or more solar cells.3. The power conversion system of claim 1 , wherein each DC power source comprises one or of a battery claim 1 , a supercapacitor claim 1 , and a fuel cell.4. The power conversion system of claim 1 , wherein each energy packet generator comprises a first switching stage in electrical communication with the corresponding DC power source claim 1 , and wherein the ...

Modulation of Multi-Phase Inverter

The multi-phase inverter modulating method provides for calculating a duty cycle vector (D) calculated as a function of electric parameters defining a rotating vector (Vo) representative of an output electric quantity required from the inverter, is multiplied for a stored modulation matrix to obtain a plurality of duty cycle signals for a plurality of electronic switches of said inverter. 119-. (canceled)20. A method of modulating a multiphase inverter wherein the inverter comprises a pulse width modulation (PWM) modulator and plurality of electronic inverter switches , the method comprising:calculating a duty cycle vector as a function of electric parameters defining a rotating vector representative of an output electric quantity required from the inverter;multiplying the duty cycle vector by a stored modulation matrix to obtain a plurality of duty cycle signals for the plurality of electronic switches of said inverter; anddriving the inverter switches as a function of the duty cycle signals.21. The method of claim 20 , wherein said duty cycle vector is multiplied by a number of modulation matrices determined by a number of voltage levels of said inverter.22. The method of claim 20 , further comprising:storing data defining a plurality of modulation matrices;for each PWM cycle in said inverter, determining a modulation index and a phase angle of a rotating vector representative of an output electric quantity required from the inverter;determining a sector of a complex plane said rotating vector is located;calculating the duty cycle vector based on the phase angle and on a modulus of said rotating vector;executing a matrix multiplication between the duty cycle vector and at least one modulation matrix corresponding to said sector to obtain a plurality of duty cycles for the plurality of electronic switches of said inverter; andloading said duty cycles into the PWM modulator of said inverter and generating, by means of said PWM modulator, physical signals for driving ...

INVERTER DEVICE

An inverter device includes a substrate, upper arm elements, lower arm elements, positive and negative input electrodes, and an output electrode. The upper arm elements serve as an upper switching element and are arranged along a first direction. The lower arm elements serve as a lower arm switching element and are arranged along the first direction. At least one of bus bars of the positive and negative input electrodes and the output electrode extends parallel to the first direction. At least one of the bus bars of the positive and negative input electrodes and the output electrode has a length in the longitudinal direction that is greater than a width between two ends of the upper arm elements and the lower arm elements in the first direction. 1. An inverter device for converting power , the inverter device comprising:a substrate;an upper arm group including a plurality of upper arm elements and serving as an upper arm switching element, wherein the upper arm elements are arranged on the substrate in a single line along a first direction and connected in parallel to each other,a lower arm group including a plurality of lower arm elements and serving as a lower arm switching element, wherein the lower arm elements are arranged on the substrate in a single line along the first direction and connected in parallel to each other;positive and negative input electrodes sandwiching the upper and lower arm groups on the substrate, wherein each of the positive and negative electrodes includes a terminal and a bus bar; andan output electrode sandwiched between the upper arm group and the lower arm group on the substrate, wherein the output electrode includes a terminal and a bus bar, whereinat least one of the bus bars of the positive and negative input electrodes and the output electrode extends so that a longitudinal direction of the bus bar is parallel to the first direction, andat least one of the bus bars of the positive and negative input electrodes and the output ...

Quadrature-Corrected Feedforward Control Apparatus and Method for DC-AC Power Conversion

An apparatus and method for controlling the delivery of a pre-determined amount of power from a DC source to an AC grid includes an inverter and an inverter controller. The inverter includes an input converter, an energy storage capacitor, and an output converter. The inverter controller includes an input converter controller and an output converter controller. The input converter controller includes feedforward controller configured to perform a calculation to determine a value for the duty cycle for the input converter such that: (1) the input converter delivers the pre-determined amount of power and (2) the magnitude of a ripple signal reflected into the input source is attenuated toward zero. The input converter controller may also include a quadrature corrector configured to determine the effectiveness of the calculation in attenuating the ripple and to adaptively alter the calculation to improve the effectiveness. 1. An apparatus for controlling the delivery of power from a unipolar input source to an alternating-current (AC) grid , the AC grid characterized by a grid voltage , V , a nominal grid frequency ω , and a grid phase θ , the apparatus comprising:an inverter including (i) an input converter configured to deliver power from the unipolar input source to a unipolar bus, (ii) an energy storage element coupled to the unipolar bus and configured to supply energy to and absorb energy from the unipolar bus, and (iii) an output converter coupled to the unipolar bus and configured to deliver power from the unipolar bus to the AC grid in the form of a substantially sinusoidal current at the grid frequency; andan input converter controller coupled to the input converter and comprising(i) a feedforward controller configured to perform a calculation to determine a value for a duty cycle for the input converter such that a magnitude of a ripple signal reflected into the input source is attenuated toward zero and (ii) a quadrature corrector configured to determine ...

REACTOR, COMPOSITE MATERIAL, REACTOR CORE, CONVERTER, AND POWER CONVERSION DEVICE

A reactor A includes a single coil formed by spirally winding a wire and a magnetic core that is disposed inside and outside the coil and forms a closed magnetic circuit. The magnetic core includes an inner core portion disposed inside the coil and an outer core portion disposed so as to cover the outer periphery of the coil . The outer core portion is formed of a composite material containing a magnetic powder and a resin. In a section of this composite material, the maximum bubble diameter is 300 μm or less. In the reactor A, the outer core portion has a maximum bubble diameter of 300 μm or less and, as a result, the loss is low and magnetic characteristics are less likely to be decreased. 1. A reactor comprising a coil and a magnetic core ,wherein at least a portion of the magnetic core is formed of a composite material containing a magnetic powder and a resin, anda maximum diameter of bubbles in a section of the composite material is 300 μm or less.2. The reactor according to claim 1 , wherein a total area percentage of the bubbles in the section of the composite material is 1% or less.3. The reactor according to claim 2 , wherein a total area percentage of the bubbles in the section of the composite material is 0.2% or less.4. The reactor according to claim 1 , wherein a volume percentage of the magnetic powder in the composite material is 30% by volume or more and 70% by volume or less.5. The reactor according to claim 1 , wherein at least a portion of a part of the magnetic core claim 1 , the part being disposed inside the coil that has a cylindrical shape and is formed by winding a wire claim 1 , is formed of the composite material.6. The reactor according to claim 1 , wherein at least a portion of a part of the magnetic core claim 1 , the part being disposed outside the coil that has a cylindrical shape and is formed by winding a wire claim 1 , is formed of the composite material.7. The reactor according to claim 1 , wherein the magnetic core is ...

PHOTOVOLTAIC INVERTER AND A CONTROL METHOD THEREOF

A photovoltaic inverter includes an input circuit, a decoupling circuit and an output circuit. The input circuit has a DC input port, an input capacitor, a magnetizing inductor, a first unidirectional element and a first switch. The magnetizing inductor forms first and second connection nodes. The decoupling circuit has a second unidirectional element, a second switch, a third switch, a third unidirectional element and a decoupling capacitor. The second unidirectional element and the second switch are connected in series at a first node. The third switch and the third unidirectional element are connected in series at a second node. The output circuit has a transformer, a fourth unidirectional element, a fourth switch, an output capacitor, a fifth switch, a fifth unidirectional element, an output inductor and an AC output port. The transformer includes an input port and first and second output ports. A control method of the inverter is disclosed. 1. A photovoltaic inverter comprising:an input circuit having a direct current (DC) input port, an input capacitor, a magnetizing inductor, a first unidirectional element and a first switch, wherein the DC input port is connected to the input capacitor in parallel, wherein the input capacitor is connected to the magnetizing inductor, the first unidirectional element and the first switch in series, and wherein the magnetizing inductor has two ends forming a first connection node and a second connection node;a decoupling circuit having a second unidirectional element, a second switch, a third switch, a third unidirectional element and a decoupling capacitor, wherein the second unidirectional element and the second switch are connected in series at a first node and connected between the first connection node and the second connection node, wherein the third switch and the third unidirectional element are connected in series at a second node and connected between the first connection node and the second connection node, and ...

CONTROL FOR FAULT-BYPASS OF CASCADED MULTI-LEVEL INVERTER

A cascaded multi-level inverter is controlled in fault bypass operation. Rather than relying on approximations or feedback forms, the reference voltages are generated as an analytic solution. The analytic solution and its implementation are not affected by the output frequency of the inverter and it is able to provide maximum possible balanced line-line voltage to a three-phase motor. In addition, the analytic solution provides exact limits for the allowable operation region of the motor power factor in order to prevent overvoltage conditions of the cell inverter. 1. A system for control in fault-bypass of a cascaded multi-level inverter , the system comprising:a first plurality of first inverter leg cells connected in series for a first phase;a second plurality of second inverter leg cells connected in series for a second phase;a third plurality of third inverter leg cells connected in series for a third phase; andwherein the fault-bypass results in a different number of the first inverter leg cells in the first plurality than of the second inverter leg cells in the second plurality being active;a processor configured to generate reference voltages, free of feedback, for active ones of the first, second, and third leg inverter cells, all of the active first inverter leg cells being operated with a first common one of the reference voltages, all of the active second inverter leg cells being operated with a second common one of the reference voltages, and all of the active third inverter leg cells being operated with a third common one of the reference voltages.2. The system of further comprising a memory claim 1 , the memory comprising a look up table of the reference voltages claim 1 , the look up table outputting the reference voltages as a function of input of numbers of active first claim 1 , second claim 1 , and third inverter leg cells.3. The system of wherein the first claim 1 , second claim 1 , and third inverter leg cells operate with pulse wave modulation ...

GATE DRIVING CIRCUIT AND INVERTER HAVING THE SAME

An inverter includes an inverter unit including at least one inverter arm having at least one high side switch and at least one low side switch connected to each other in series between a ground and an input power terminal providing input power having a preset voltage level, and switching the input power to output AC power; and a high voltage gate driving circuit unit including at least one high voltage gate driving unit having a plurality of high voltage gate drivers connected in series between an input terminal of an instruction signal requesting a switching control of the inverter unit and an output terminal of a control signal controlling switching of the inverter unit, such that switching of the high side switch is controlled, and voltage generated at the time of switching the high side switch is divided and applied to the plurality of high voltage gate drivers. 1. A gate driving circuit comprising: a high voltage gate driving circuit unit including at least one high voltage gate driving unit having a plurality of high voltage gate drivers connected to each other in series between an input terminal of an instruction signal requesting a switching control of an inverter unit and an output terminal of a control signal controlling switching of the inverter unit , the inverter unit including at least one inverter arm having at least two switches and switching input power to output alternating current (AC) power , and the high voltage gate driving circuit unit controlling switching of a high side switch of the at least two switches , dividing voltage generated at the time of the switching of the high side switch , and applying the divided voltage to the plurality of high voltage gate drivers.2. The gate driving circuit of claim 1 , wherein the high voltage gate driving circuit unit includes a voltage-dividing unit dividing the voltage generated at the time of the switching of the high side switch and applied to the plurality of high voltage gate drivers claim 1 , ...

DC-AC POWER CONVERTING APPARATUS AND SOLAR POWER SUPPLYING APPARATUS INCLUDING THE SAME

There are provided a DC-AC power converting apparatus including no capacitor or a small capacity capacitor for removing a ripple in an input terminal thereof by charging or discharging power according to a difference between output power and instantaneous system power of a photovoltaic cell, and a solar power supplying apparatus including the same, the DC-AC power converting apparatus including a DC-AC power converting unit converting DC power into AC power, and a charging and discharging unit charging surplus power induced when a level of the DC power is higher than that of the AC power and discharging the charged power when the level of the DC power is lower than that of the AC power. 1. A direct current (DC)-alternating current (AC) power converting apparatus , comprising:a DC-AC power converting unit converting DC power into AC power; anda charging and discharging unit charging surplus power induced when a level of the DC power is higher than that of the AC power and discharging the charged power when the level of the DC power is lower than that of the AC power.2. The DC-AC power converting apparatus of claim 1 , wherein the charging and discharging unit includes:a charging switch performing a switching operation to provide a charging path for the induced surplus power, when the level of the DC power is higher than that of the AC power;a discharging switch performing a switching operation to provide a discharging path for the charged power, when the level of the DC power is lower than that of the AC power; anda capacitor unit charging or discharging power according to the switching operations of the charging switch and the discharging switch.3. The DC-AC power converting apparatus of claim 2 , wherein the charging switch and the discharging switch are alternately switched on and switched off with respect to each other.4. The DC-AC power converting apparatus of claim 2 , wherein the charging and discharging unit further includes:an inductor unit LC resonating ...

POWER CONVERSION SYSTEM

A power conversion system includes a filter unit, a DC/DC converter, a DC link, an inverter, a control unit, and a traction motor. The DC/DC converter is used for boosting DC voltage of a DC source and electrically coupled to the DC source through the filter unit. The DC/DC converter includes multiple SiC MOSFETs configured in a synchronous rectification mode by channel reverse conduction control. The inverter is used for converting the boosted DC voltage from the converter to multi-phase AC voltage through the DC link. The control unit is used for providing PWM commands to the converter and the inverter, to convert the DC voltage to AC voltage configured to drive an AC driven device. 1. A power conversion system comprising:a filter unit;a DC/DC converter for boosting DC voltage of a DC source and electrically coupled to the DC source through the filter unit; wherein the DC/DC converter comprises a plurality of silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs) configured in a synchronous rectification mode by channel reverse conduction control;a DC link;an inverter for converting the boosted DC voltage from the DC/DC converter to multi-phase AC voltage through the DC link; anda control unit for providing pulse-width modulation (PWM) commands to the converter and the inverter, to convert the DC voltage to AC voltage configured to drive an AC driven device.2. The power conversion system of claim 1 , wherein the inverter comprises a plurality of SiC MOSFETs configured in a synchronous rectification mode by channel reverse conduction control.3. The power conversion system of claim 1 , wherein the DC/DC converter is a multi-phase DC/DC converter and the inverter is a multi-phase inverter.4. The power conversion system of claim 1 , wherein the filter unit comprises a plurality of magnetic coupled inductors.5. The power conversion system of claim 4 , wherein the plurality of magnetic coupled inductors comprises a shared magnetic core and a ...

ELECTRONIC CIRCUIT OPERATING BASED ON ISOLATED SWITCHING POWER SOURCE

In an electronic circuit, a first circuit region is electrically connected to an input circuit region of an isolated switching power source, and a second circuit region is electrically connected to an output circuit region thereof. A driver of an IC is located in the second circuit region and drives a target device based on output power supplied to the second circuit region via the output circuit region from the isolated switching power source. A transferring module of the IC transfers a value of a parameter indicative of the output power from the second circuit region to the first circuit region while maintaining electrical isolation between the first and second circuit regions. An operating module of the IC performs on-off operations of a switching element to perform feedback control of the value of the parameter indicative of the output power to a target value. 1. An electronic circuit operating based on an isolated switching power source that: partitions a circuit region thereof into an input circuit region in which a power source lies and an output circuit region , the input circuit region being electrically isolated from the output circuit region; and outputs , via a switching element , power supplied from the power source to the output circuit region , the electronic circuit comprising:a first circuit region electrically connected to the input circuit region;a second circuit region electrically connected to the output circuit region; andan integrated circuit comprising:a driver located in the second circuit region and configured to drive a target device based on the output power supplied to the second circuit region via the output circuit region;a transferring module configured to transfer first information including a value of a parameter indicative of the output power from the second circuit region to the first circuit region while maintaining electrical isolation between the first and second circuit regions; andan operating module configured to perform, ...

GATE DRIVING CIRCUIT HAVING A FAULT DETECTING CIRCUIT FOR A SEMICONDUCTOR SWITCHING DEVICE

Aspects of the invention are directed to a gate driving circuit for a power conversion circuit having an upper and lower arm circuit composed of series-connected upper arm and a lower arm, each arm including two or more semiconductor switching devices connected in series. In some aspects, a gate driving circuit of the invention includes a circuit of series connection including a diode and a resistor between a positive potential side of a positive side power supply and a positive electrode side. The gate driving circuit can determine a short-circuit fault of the semiconductor switching device that is connected to the gate driving circuit by detecting the current that flows through the circuit of series connection including the diode and the resistor when an OFF command of ON/OFF command signals is given to the semiconductor switching device. 1. A gate driving circuit having a circuit for detecting a short-circuit fault of a semiconductor switching device , the gate driving circuit driving semiconductor switching devices in a power conversion circuit for converting a DC power to an AC power or converting an AC power to a DC power , the power conversion circuit comprising a DC power supply and an upper and lower arm circuit composed of an upper arm and a lower arm connected in series , each arm comprising two or more semiconductor switching devices connected in series , each semiconductor switching device having an anti-parallel connected diode , and the power conversion circuit being connected in parallel to the DC power supply and the upper and lower arm circuit , the gate driving circuit comprising:a series circuit including a diode and a resistor between a positive potential terminal of a positive side power supply of the gate driving circuit and a positive electrode of the semiconductor switching device;wherein the gate driving circuit determines a short-circuit fault of the semiconductor switching device connected with the gate driving circuit by means of a ...

GATE DRIVING CIRCUIT AND INVERTER HAVING THE SAME

There is provided an inverter including: an inverter unit including at least one inverter arm having a plurality of switches, and switching the input power according to control to output an alternating current power; at least one driving unit including at least one high voltage gate driving unit having a plurality high voltage gate drivers connected to one another in series between an input terminal of an instruction signal instructing a switching control of an inverter unit and an output terminal of a control signal controlling switching of the inverter unit to control switching driving of a high side switch and including at least one low voltage gate driver to control switching driving of a low side switch; and at least one bootstrap unit charging/discharging and dividing a voltage generated at the time of switching the plurality of switches according to switching control of the driving unit. 1. A gate driving circuit , comprising:at least one gate driving unit including at least one high voltage gate driving unit having a plurality of high voltage gate drivers connected to one another in series between an input terminal of an instruction signal instructing a switching control of an inverter unit including at least one inverter arm having a plurality of switches and switching input power according to a control to output alternating current (AC) power and an output terminal of a control signal controlling switching of the inverter unit to thereby control gate driving of a high side switch of the plurality of switches, and including at least one low voltage gate driver to control the gate driving of a low side switch of the plurality of switches; andat least one bootstrap unit dividing a voltage generated at the time of switching the plurality of switches to apply the divided voltage to respective switches according to switching control of the gate driving unit.2. The gate driving circuit of claim 1 , wherein the inverter arm includes the high side switch claim 1 , ...

DIRECT CURRENT TO ALTERNATING CURRENT CONVERTER CIRCUIT

A direct current (DC) to alternating current (AC) converter circuit without magnetic components includes a controller, a first DC power supply, a second DC power supply, a first electronic switch, a second electronic switch, a first output terminal, and a second output terminal. The controller controls the first electronic switch and the second electronic switch to turn on and off, to coordinate the outputs of positive and negative voltages from the first output terminal and the second output terminal to present and output an AC voltage. A cycle of the AC is equal to a cycle of a main power supply, and an average of an absolute value of a voltage of the AC is equal to an average of an absolute value of a voltage of the main power supply. 1. A direct current (DC) to alternating current (AC) converter circuit comprising:a controller;a first DC power supply comprising a positive terminal and a negative terminal;a second DC power supply comprising a positive terminal electrically connected to the negative terminal of the first DC power supply, and a negative terminal;a first output terminal;a second output terminal electrically connected to the negative terminal of the first DC power supply;a first electronic switch comprising a first terminal electrically connected to the controller, a second terminal electrically connected to the positive terminal of the first DC power supply, and a third terminal electrically connected to the first output terminal; anda second electronic switch comprising a first terminal electrically connected to the controller, a second terminal electrically connected to the first output terminal, and a third terminal electrically connected to the negative terminal of the second DC power supply;wherein the controller controls the first electronic switch and the second electronic switch to be turned on and turned off, to make the first output terminal and the second output terminal output AC, a cycle of the AC is equal to a cycle of a main power ...

METHODS AND POWER CONVERSION SYSTEM CONTROL APPARATUS TO CONTROL IGBT JUNCTION TEMPERATURE AT LOW SPEED

Methods, apparatus and computer readable mediums are presented for controlling a multiphase inverter in which third harmonic injection pulse width modulation (THIPWM) is used for generating inverter switching control signals at or above a non-zero threshold inverter output frequency, and high frequency injection discontinuous pulse width modulation (HFIDPWM) is used for inverter output frequencies below the threshold, where the threshold frequency corresponds to a threshold period less than or equal to the thermal impedance time constant of the inverter switching devices, and the injected high frequency component for HFIDPWM corresponds to a common mode period less than the thermal impedance time constant to mitigate thermal stress on the inverter switches and low speed inverter output derating. 1. A method for controlling a multiphase inverter , the method comprising:when a fundamental output frequency of the multiphase inverter is less than a non-zero threshold frequency, using at least one electronic processor, computing a plurality of high frequency injected phase duty ratios at least partially according to at least one desired output parameter and a common mode frequency corresponding to a common mode period less than a time constant of a thermal impedance of switching devices of the multiphase inverter;when the fundamental output frequency of the multiphase inverter is less than the non-zero threshold frequency, using the at least one electronic processor, selectively computing a plurality of offset phase duty ratios at least partially according to the high frequency injected phase duty ratios and an offset value; andwhen the fundamental output frequency of the multiphase inverter is less than the non-zero threshold frequency, using the at least one electronic processor, generating inverter switching control signals using discontinuous pulse width modulation at least partially according to the offset phase duty ratios.2. The method of claim 1 , comprising:when ...

VOLTAGE CONVERTER

A radio frequency transponder circuit, comprising: an AC-DC converter () connected to an RF input terminal () and a DC output terminal () and operable to convert an RF signal (RF) at the RF input terminal () to a DC output signal (V) at the DC output terminal (); and a voltage limiting circuit () connected to the RF input terminal () and operable to limit the amplitude of the RF signal (RF); wherein the voltage limiting circuit () comprises a NMOS limiting transistor () in parallel with a complimentary PMOS limiting transistor (). 1. A voltage converter , comprising:an AC-DC converter connected to an RF input terminal and a DC output terminal and operable to convert an RF signal at the RF input terminal to a DC output signal at the DC output terminal; anda voltage limiting circuit connected to the RF input terminal and operable to limit the amplitude of the RF signal;wherein the voltage limiting circuit comprises a NMOS limiting transistor in parallel with a complimentary PMOS limiting transistor.2. The voltage converter of claim 1 , wherein the voltage limiting circuit further comprises a biasing means operable to generate a positive and negative bias voltage for controlling the operation of the NMOS and PMOS limiting transistors respectively.3. The voltage converter of claim 2 , wherein the biasing means is configured to provide symmetric bias potentials to the NMOS and PMOS limiting transistors.4. The voltage converter of claim 3 , wherein the biasing means comprises a charge pump.5. The voltage converter of claim 4 , wherein the biasing means comprises a charge pump arranged to generate a negative bias potential from the RF signal.6. The voltage converter of claim 5 , wherein the biasing means comprises a first charge pump and a second charge pump claim 5 , wherein the first charge pump is arranged to generate a negative bias signal from the RF signal claim 5 , and the second charge pump is arranged to generate a positive bias signal from the RF signal.7. The ...

POWER CONVERSION APPARATUS

A power conversion apparatus includes: a first conductive member; a horizontal switching element disposed on the first conductive member; an insulating member disposed on the first conductive member; and a control switching element disposed on the first conductive member via the insulating member, the control switching element being coupled to the horizontal switching element and configured to control driving of the horizontal switching element. 1. A power conversion apparatus , comprising:{'b': 32', '33, 'i': a', 'b, 'a first conductive member (, );'}{'b': 11', '11', '12', '12, 'i': a', 'c', 'a', 'c, 'a horizontal switching element (to , to ) disposed on the first conductive member;'}{'b': 2', '3, 'an insulating member (, ) disposed on the first conductive member; and'}{'b': 13', '13', '14', '14, 'i': a', 'c', 'a', 'c, 'a control switching element (to , to ) disposed on the first conductive member via the insulating member, the control switching element being coupled to the horizontal switching element and configured to control driving of the horizontal switching element.'}2. The power conversion apparatus according to claim 1 , further comprising{'b': 2', '3, 'i': a', 'a, 'a second conductive member (, ) disposed between the insulating member and the control switching element.'}3. The power conversion apparatus according to claim 2 , wherein{'b': 201', '301', '202', '302, 'i': a', 'a', 'a', 'a, 'the second conductive member includes a first portion (, ) where the control switching element is disposed, and a second portion (, ) adjacent to the first portion in plan view, and'}the second portion has an area larger than an area of the first portion in plan view.4. The power conversion apparatus according to claim 3 , wherein{'b': 111', '121, 'the horizontal switching element and the second portion of the second conductive member are coupled together by a first wire (, ).'}5. The power conversion apparatus according to claim 4 , whereinthe horizontal switching element ...

Inverter Having at Least One Inverter Bridge Between Two Busbars

An inverter has an inverter bridge connected between two DC busbars on the input side and connected to an AC output on the output side. The two DC busbars run, in a manner overlapping one another, in planes which are parallel to one another. The inverter bridge has a subcircuit having a plurality of semiconductor switches between the AC output and each DC busbar. Semiconductor modules which form the two subcircuits are connected, in a manner arranged beside one another, to the two DC busbars and to the AC output via connections. A connection element which leads to the AC output begins on that side of the DC busbar which faces the semiconductor modules in a region overlapped by the DC busbars and connects the semiconductor modules of the two subcircuits to one another there. 1. An inverter comprising an inverter bridge , which is connected on an input side thereof between two DC busbars and on an output side thereof to an AC output ,wherein the two DC busbars extend, overlapping one another, in mutually parallel planes,wherein the inverter bridge comprises a subcircuit between the AC output and each DC busbar, thereby defining two subcircuits,wherein semiconductor modules, which form the two subcircuits, are arranged next to one another,wherein the semiconductor modules are connected to the two DC busbars and the AC output via connections, andwherein a connection element, which leads to the AC output, connects the semiconductor modules of the two subcircuits to one another in a region overlapped by the DC busbars,wherein each subcircuit provided between the AC output and one of the DC busbars comprises a plurality of semiconductor switches, andwherein the connection element, which leads to the AC output, begins in the region overlapped by the DC busbars on a side of the DC busbars that faces the semiconductor modules, connects the semiconductor modules of the two subcircuits to one another there, and emerges beneath the DC busbars.2. The inverter as claimed in claim ...

MODULAR ENERGY STORAGE SYSTEMS AND RELATED METHODS

A modular energy storage system has: a battery module with a battery and internal circuitry; a control module with a power outlet, internal charge-and-discharge electrical components, and a power inlet for connection to a power source in use; the battery module defining a top seat that has an associated electrical connector; and the battery module being mounted to the control module below the control module by the top seat, whose respective associated electrical connector connects to the internal charge-and-discharge electrical components to permit the control module to: charge the battery module with power from the power source; and discharge the battery module by transferring power from the battery module to the power outlet. 1. A modular energy storage system comprising:a battery module with a battery and internal circuitry;a control module with a power outlet, internal charge-and-discharge electrical components, and a power inlet for connection to a power source in use;the battery module defining a top seat that has an associated electrical connector; and charge the battery module with power from the power source; and', 'discharge the battery module by transferring power from the battery module to the power outlet., 'the battery module being mounted to the control module below the control module by the top seat, whose respective associated electrical connector connects to the internal charge-and-discharge electrical components to permit the control module to2. The modular energy storage system of in which:the battery module defines a bottom seat with an associated electrical connector; andthe bottom seat of the battery module is structured such that if a second battery module identical to the battery module were stacked below the battery module, the bottom seat and associated electrical connector of the battery module would mate with the top seat and associated electrical connector, respectively, of the second battery module, to permit the control module to ...

Power Semiconductor Device and Power Conversion Device

A power semiconductor device includes a plurality of power semiconductor elements constituting upper and lower arms of an inverter circuit, a first sealing member sealing the plurality of power semiconductor elements, a positive electrode-side terminal and a negative electrode-side terminal each connected with any of the plurality of power semiconductor elements and protruding from the first sealing member, a second sealing member sealing at least a part of the positive electrode-side terminal and at least a part of the negative electrode-side terminal, and a case in which the power semiconductor elements sealed with the first sealing member are housed. 1. A power semiconductor device , comprising:a plurality of power semiconductor elements constituting upper and lower arms of an inverter circuit;a plurality of conductor plates connected with the plurality of power semiconductor elements through a metal bounding material;a DC positive terminal formed integrally with either one of the plurality of conductor plates;a DC negative terminal connected with another one of the plurality of conductor plates through a metal bounding material:a sealing member fixing the plurality of power semiconductor elements the plurality of conductor plates, the DC positive terminal, and the DC negative terminal, wherein:each of the DC positive terminal and the DC negative terminal has a main surface and a side surface that is narrower than the main surface; andthe DC positive terminal and the DC negative terminal are protruded from one surface of the sealing member in a state that the side surfaces thereof are opposite to each other.2. The power semiconductor device according to claim 1 , wherein:a connection terminal is integrally formed in the conductor plate that is connected with the DC negative terminal through the metal bounding material; andthe DC negative terminal is connected with the connection terminal through the metal bounding material.3. The power semiconductor device ...

POWER CONVERTER APPARATUS

A power converter apparatus is provided, which includes a horizontal switching device, a control switching device connected with the horizontal switching device and for controlling drive of the horizontal switching device, and a heat insulating member disposed between the horizontal switching device and the control switching device and for reducing that heat generated from the horizontal switching device is transferred to the control switching device. 1. A power converter apparatus , comprising:a horizontal switching device;a control switching device connected with the horizontal switching device and for controlling drive of the horizontal switching device; anda heat insulating member disposed between the horizontal switching device and the control switching device and for reducing that heat generated from the horizontal switching device is transferred to the control switching device.2. The power converter apparatus of claim 1 , further comprising a heat conducting member disposed opposite from the control switching device with respect to the horizontal switching device claim 1 , and having a higher thermal conductivity than a thermal conductivity of the heat insulating member.3. The power converter apparatus of claim 2 , wherein the heat conducting member is made of an insulating material.4. The power converter apparatus of claim 2 , wherein the horizontal switching device includes a heat-generating surface claim 2 , andwherein the heat conducting member is disposed on the heat-generating surface side of the horizontal switching device.5. The power converter apparatus of claim 4 , wherein the control switching device is disposed via the heat insulating member claim 4 , on the opposite side from the heat-generating surface of the horizontal switching device.6. The power converter apparatus of claim 4 , wherein the heat insulating member is disposed so as to entirely cover a surface of the horizontal switching device opposite from the heat-generating surface.7. The ...

POWER SUPPLY SYSTEM AND POWER SOURCE APPARATUS

A power supply system that comprises an electrical storage device; a power conversion circuit configured to convert a power from the electrical storage device into converted DC power; and a power control unit configured to receive the converted DC power and output AC power. The converted DC power is controlled such that the output AC power is a predetermined AC power. 1. A power supply system comprising:an electrical storage device;a power conversion circuit configured to convert a power from the electrical storage device into converted DC power; anda power control unit configured to receive the converted DC power and output AC power,wherein the converted DC power is controlled such that the output AC power is a predetermined AC power.2. A power supply system according to claim 1 , wherein the power control unit is a power conditioner.3. A power supply system according to claim 1 , wherein the converted DC power is controlled based on characteristics of the power control unit.4. A power supply system according to claim 3 , wherein the characteristics of the power control unit include the output AC power changing according to an inputted voltage.5. A power supply system according to claim 3 , wherein the characteristics of the power control unit include the output AC power increasing as an inputted voltage increases.6. A power supply system according to claim 5 , wherein the characteristics of the power control unit include the output AC power being limited to a maximum output power.7. A power supply system according to claim 3 , wherein the characteristics of the power control unit include performing Maximum Power Point Tracking (MPPT) control.8. A power supply system according to claim 1 , wherein the power conversion circuit outputs the converted DC power similar to power output from solar cells.9. A power supply system according to claim 1 , further comprising:a power detection unit configured to detect information related to the output AC power; anda feedback ...

RESONANT INVERTER TOPOLOGY, WIRELESS CHARGER, AND CONTROL METHOD

A wireless charger for an electric vehicle and a resonant inverter comprising a resonant portion that serially connects to a phase shifting portion and serially connects with a load component and a method for controlling a resonant inverter having multiple phase shifts, comprising operating the frequency of the resonant inverter close to the resonant frequency of the inverter through the full operation range of the resonant inverter; and adjusting phase shifts to control the output power of the resonant inverter. 1. A resonant inverter comprising:an inverter portion connected to an intercell transformer portion and a common resonant portion having a load component,{'sub': 1', 'n, 'wherein the intercell transformer portion includes N (N>2) transformers ICTto ICT,'}wherein each transformer includes a primary winding having an input terminal and an output terminal and a secondary winding having an input terminal and an output terminal, and [{'sub': 1', 'n, 'transformers ICTand ICTare connected with each other, and'}, {'sub': 2', 'n-1, 'for each transformer that belongs to the group of ICTto ICT, one output terminal of that transformer is connected with the common resonant portion, while the other output terminal of that transformer is connected with an input terminal of an adjacent transformer.'}], 'wherein the intercell transformer portion is configured such that2. The resonant inverter of claim 1 , wherein the intercell transformer portion includes a plurality of intercell transformers connected with each other in an interweaving manner.3. The resonant inverter of claim 2 , wherein the intercell transformer portion includes three intercell transformers.4. The resonant inverter of claim 2 , wherein each intercell transformer directly connects with at least two other intercell transformers.5. The resonant inverter of claim 2 , wherein the plurality of intercell transformers are identical to each other.6. The resonant inverter of claim 1 , wherein the resonant portion ...

SEMICONDUCTOR DEVICE, DRIVE DEVICE FOR SEMICONDUCTOR CIRCUIT, AND POWER CONVERSION DEVICE

A semiconductor device according to the present invention includes: a first semiconductor layer of a first conductivity type; a second semiconductor layer of the first conductivity type adjacent to the first semiconductor layer and having an impurity concentration lower than the first semiconductor layer; a third semiconductor layer of a second conductivity type adjacent to the second semiconductor layer; a fourth semiconductor layer of the first conductivity type located within the third semiconductor layer; a first electrode coupled to the third semiconductor layer and the fourth semiconductor layer; a second electrode coupled to the first semiconductor layer; and an insulated gate provided over the respective surfaces of the third semiconductor layer and the fourth semiconductor layer, wherein peak value of the impurity concentration of the third semiconductor layer is in the range of 2×10cmor more and 5×10cmor less. 1. A semiconductor device comprising:a first semiconductor layer of a first conductivity type;a second semiconductor layer of the first conductivity type, which is adjacent to the first semiconductor layer and has an impurity concentration lower than the first semiconductor layer;a third semiconductor layer of a second conductivity type adjacent to the second semiconductor layer;a fourth semiconductor layer of the first conductivity type located within the third semiconductor layer;a first electrode electrically coupled to the third semiconductor layer and the fourth semiconductor layer;a second electrode electrically coupled to the first semiconductor layer; andan insulated gate provided over each of the surfaces of the third semiconductor layer and the fourth semiconductor layer,{'sup': 16', '−3', '18', '−3, 'wherein the peak value of the impurity concentration of the third semiconductor layer is in the range of 2×10cmor more and 5×10cmor less.'}2. A semiconductor device according to claim 1 ,wherein the semiconductor device comprises a fifth ...

Power Converter Circuit and Method

A power converter circuit includes a converter series circuit that includes a number of converter units. The converter series circuit is configured to output a series circuit output current. A synchronization circuit is configured to generate at least one synchronization signal. At least one of the converter units is configured to generate an output current such that at least one of a frequency or a phase of the output current is dependent on the synchronization signal, and includes a converter stage with an inverting buck boost topology. 1. A power converter circuit , comprising:a converter series circuit comprising a plurality of converter units, the converter series circuit configured to output a series circuit output current; anda synchronization circuit configured to generate at least one synchronization signal;wherein at least one of the plurality of converter units is configured to generate an output current such that at least one of a frequency or a phase of the output current is dependent on the synchronization signal, and includes a converter stage with an inverting buck boost topology.2. The power converter circuit of claim 1 , wherein each of the plurality of converter units comprises an input configured to be coupled to a power source.3. The power converter circuit of claim 1 ,wherein the power converter circuit is configured to receive an external voltage; andwherein the synchronization circuit is configured to generate the synchronization signal dependent on a voltage level of the external voltage.4. The power converter circuit of one of claim 1 , wherein the synchronization circuit is configured to generate the synchronization signal such that there is a phase difference between the external voltage and the synchronization signal.5. The power converter circuit of claim 1 ,wherein the power converter circuit is configured to receive an external alternating voltage, andwherein the synchronization circuit is configured to generate the synchronization ...

INVERTER DEVICE AND INVERTER-INTEGRATED ELECTRIC MOTOR

An inverter device is formed of the two systems of inverters stored inside a cylindrical metal casing. Each inverter converts DC power to three-phase AC power. The inverters are formed of power semiconductor elements, DC bus bars through which DC power supplied to the respective power semiconductor elements, capacitors connected to the DC bus bars, and switches connected between the respective DC bus bars and the DC input terminals. High-impedance switches are disposed in the vicinity of the DC input terminals. Hence, electromagnetic noises generated by switching actions of the power semiconductor elements are circulated within the inverters by way of the capacitors and eventually attenuated. 1. An inverter device characterized by comprising:power semiconductor element groups respectively forming two systems of inverters each converting DC power to AC power;DC bus bars through which DC power supplied to the corresponding power semiconductor element groups;DC input terminals connected to the respective DC bus bars so as to supply DC power from an outside power supply to the connected DC bus bars;first and second switches provided between the DC input terminals and the respective DC bus bars to switch the corresponding DC bus bars to be electrically conductive or cut off; andcapacitors connected to the respective DC bus bars,impedances in a high-frequency area of the first and second switches being set to be higher than impedances of the DC bus bars.2. The inverter device according to claim 1 , characterized in that:a cylindrical metal casing is provided; andthe power semiconductor element groups, the DC bus bars, the DC input terminals, and the capacitors are stored inside the metal casing.3. The inverter device according to claim 2 , characterized in that:the first and second switches are stored inside the metal casing.4. The inverter device according to claim 1 , characterized in that:a third switch is provided so as to connect the DC bus bars to each other.5. The ...

SOLID-STATE POWER CONVERTERS

A phase leg for a multilevel inverter includes a first direct current lead, an outer solid-state switch, an inner solid-state switch, and a midpoint-clamping device. The outer solid-state switch device is connected to the first direct current lead. The inner solid-state switch is connected in series with the outer solid-state switch. The midpoint-clamping device is a bi-directional current flow device connected between a second DC lead and a node between the inner and outer solid-state switches for reducing conduction losses associated with current flowing through the phase leg. 1. A phase leg for a multilevel inverter , comprising:a first DC lead;an outer solid-state switch connected to the first DC lead;an inner solid-state switch connected in series with the outer solid-state switch; anda midpoint-clamping device connected between a second DC lead and a node between the inner and outer solid-state switches, wherein the midpoint-clamping device is a bi-directional current flow device for reducing conduction losses associated with current flowing through the device.2. A phase leg as recited in claim 1 , wherein the midpoint-clamping device is a MOSFET.3. A phase leg as recited in claim 1 , further including a diode connected in parallel with the midpoint-clamping device.4. A phase leg as recited in claim 1 , wherein the inner and outer solid-state switches are MOSFET devices.5. A phase leg as recited in claim 1 , wherein the inner and outer solid-state switches are IGBT devices.6. A phase leg as recited in claim 1 , wherein the inner solid-state switch is a first inner solid-state switch claim 1 , and further including a second inner solid-state switch connected in series with the first inner solid-state switch.7. A phase leg as recited in claim 6 , wherein the outer solid-state switch is a first outer solid-state switch claim 6 , and further including a second outer solid-state switch connected in series with the second inner solid-state switch.8. A phase leg as ...

ELECTRICAL NODE WITH MONITORING FEATURE

A first electrical node configured to monitor a digital signal is disclosed. The first electrical node includes a first connector and a second connector. The first electrical node includes a processor configured to receive a digital signal from the second connector. The processor is configured to determine whether a portion of the digital signal is intended for the first electrical node. The processor is configured to convert the portion of the digital signal to an analog signal based on whether the portion is intended for the first electrical node without affecting the digital signal received. 1. A first electrical node for forming daisy-chain buses with simultaneous serial data transmission and power transmission , comprising:a housing,a first connector adjacent the housing, the first connector operable to mate with a computing device; a second connector power contact,', 'a second connector data contact; and', a digital-to-analog circuit that is electrically coupled to the first connector,', 'a processor,', receive a digital signal from the second connector data contact;', 'determine whether a portion of the digital signal is intended for the first electrical node; and', 'convert, with the digital-to-analog circuit, the portion of the digital signal to an analog signal based on whether the portion is intended for the first electrical node without affecting the digital signal received., 'a memory communicatively coupled to the processor, wherein the memory comprises instructions, that, when executed by the processor, cause the processor to], 'a controller circuit comprising], 'a second connector adjacent the housing, the second connector comprises2. The first electrical node of claim 1 , a third connector adjacent the housing claim 1 , the third connector comprises:a third connector power contact, wherein, the second connector power contact is electrically coupled to the third connector power contact;a third connector data contact.3. The first electrical node of ...

SEMICONDUCTOR MODULE

A semiconductor module can be realized, which is formed by mounting an electronic component and a bus bar by solder on a lead frame including a plurality of terminals, wherein a solder flow suppressing section capable of restricting a direction of flow of solder on the lead frame is formed in the vicinity of the solder portion of the component mounted by solder, and by this configuration, positional deviation, such as rotation or movement of the mounted component, is suppressed and the size of the module can be made compact. 1. A semiconductor module formed by mounting an electronic component and a bus bar by soldering onto a lead frame including a plurality of terminals , wherein on the lead frame a solder flow suppressing section capable of restricting a direction of flow of solder on the lead frame is formed in the vicinity of a solder portion of the component mounted by solder thereon.2. The semiconductor module according to claim 1 , wherein the solder flow suppressing section is formed on the lead frame by providing an uneven shape in at least one portion of a region along the solder portion.3. The semiconductor module according to claim 1 , wherein the solder flow suppressing section is formed in the lead frame by providing a notch or hole in at least one portion of a region along the solder portion.4. The semiconductor module according to claim 2 , wherein the uneven shape is provided in a whole region along the solder portion on the lead frame.5. The semiconductor module according to claim 3 , wherein the notch or hole is provided in a whole region along the solder portion of the lead frame.6. The semiconductor module according to claim 3 , wherein the width of the notch or hole provided in the lead frame as the solder flow suppressing section is equal to or greater than the thickness of the lead frame.7. The semiconductor module according to claim 2 , wherein the uneven shape provided on the lead frame as the solder flow suppressing section is formed by ...

METHOD FOR CONTROLLING AN INVERTER, AND INVERTER

The invention relates to a method for controlling an inverter and to an inverter a DC/DC stage, which comprises at least one main switch (S2) and a discharge circuit, and with a DC/AC stage. The discharge circuit is formed by a series connection of a bidirectional switching element, which comprises two switches (SA1, SA2), and an inductivity. A device is provided for controlling the switches (SA1, SA2) and is designed such that one switch (SA1, SA2) is activated in an alternating manner and the switch-on time of the switch is determined by the controlling device prior to a switch-off time of the main switch (S2).

RC-IGBT SWITCHING PULSE CONTROL

A method for controlling a first and a second reverse-conducting insulated gate bipolar transistor (RC-IGBT), electrically connected in series, is disclosed. A collector of the first RC-IGBT is electrically connected to a positive pole of a direct current voltage source, and an emitter of the second RC-IGBT is electrically connected to a negative pole of the DC voltage source. Further, an emitter of the first RC-IGBT is electrically connected to a collector of the second RC-IGBT to form an alternating current terminal. A gate voltage is applied to respective gates of the first and second RC-IGBTs, wherein the gate voltage is controlled based on a magnitude and a direction of an output current on the AC terminal and on a command signal alternating between a first and a second value. 116.-. (canceled)17. A method of controlling a first and a second reverse-conducting insulated gate bipolar transistor , RC-IGBT , electrically connected in series , wherein:a collector of the first RC-IGBT is electrically connected to a positive pole of a direct current, DC, voltage source and an emitter of the second RC-IGBT is electrically connected to a negative pole of the DC voltage source; andan emitter of the first RC-IGBT is electrically connected to a collector of the second RC-IGBT to form an alternating current, AC, terminal,the method comprising the steps of:comparing a magnitude of an output current on the AC terminal with a selected threshold; andapplying a gate voltage to respective gates of the first and second RC-IGBTs,wherein said gate voltage is controlled based on a direction of the output current on the AC terminal, the comparison of the magnitude of the output current on the AC terminal with the selected threshold and on a command signal indicating targeted turn-on and turn-off instants for the respective RC-IGBTs, and wherein, if said comparison indicates that the magnitude of the output current on the AC terminal exceeds the selected threshold and the direction of ...

METHOD FOR THE OPERATION OF AN INVERTER, AND INVERTER

The invention relates to a method for operating an inverter (), in particular a pulse-controlled inverter, comprising multiple phase systems (), each of which has an outer conductor () and at least one semiconductor component (), and a temperature monitoring device () that has multiple temperature sensors () which sense the temperature of at least one part of at least one of the phase systems (). In said method, a temperature gradient is determined from each of the sensed temperatures, the difference of the determined temperature gradients from an estimated gradient value is ascertained, and if the difference exceeds a threshold value, a fault of the inverter (), in particular of a cooling device of the inverter (), is identified. The invention further relates to an inverter (). 1. A method for operating an inverter , wherein the inverter has a plurality of phase systems , each with an outer conductor and at least one semiconductor component , and also a temperature monitoring device that has a plurality of temperature sensors , wherein the temperature sensors are used to sense the temperature of at least one portion of at least one of the phase systems , the method comprising: ascertaining a temperature gradient from each of the sensed temperatures , determining a deviation in the ascertained temperature gradients from a gradient estimate and , if the deviation exceeds a threshold value , identifying an error in the inverter.2. The method as claimed in claim 1 , wherein the gradient estimate is determined on the basis of the current level of the current instantaneously flowing through the phase systems.3. The method as claimed in claim 1 , wherein the gradient estimate is determined for each phase system.4. The method as claimed in claim 1 , wherein claim 1 , if the sensed temperature drops below a minimum sensor temperature and/or exceeds a maximum sensor temperature claim 1 , an error in the temperature monitoring device or in the inverter is identified.51. The ...

CIRCUIT FOR SYNCHRONOUSLY SWITCHING SERIES CONNECTED ELECTRONIC SWITCHES

A circuit includes first and second electronic switches, first and second excitation circuits, and first and second inductors. The first and second electronic switches are electrically coupled in series. The first and second excitation circuits are used for respectively controlling the first and second electronic switches to be turned on and turned off and are configured to synchronously switch the first and second electronic switches. The first inductor is electrically coupled between the first excitation circuit and the first electronic switch, for transmitting the switch control signal of the first excitation circuit to the first electronic switch. The second inductor is electrically coupled between the second excitation circuit and the second electronic switch, for transmitting the switch control signal of the second excitation circuit to the second electronic switch. 1. A circuit comprising:a first electronic switch and a second electronic switch which are electrically coupled in series;a first excitation circuit and a second excitation circuit, for respectively controlling the first and second electronic switches to be turned on and turned off, wherein the first and second excitation circuits are configured to synchronously switch the first and second electronic switches; and the first inductor is electrically coupled between the first excitation circuit and the first electronic switch, for transmitting the switch control signal of the first excitation circuit to the first electronic switch; and', 'the second inductor is electrically coupled between the second excitation circuit and the second electronic switch, for transmitting the switch control signal of the second excitation circuit to the second electronic switch., 'a first inductor and a second inductor which are magnetically coupled between each other; wherein'}2. The circuit of claim 1 , wherein the first and second electronic switches comprise insulated gate bipolar transistors (IGBTs).3. The circuit ...

POWER SEMICONDUCTOR MODULE AND POWER CONVERSION DEVICE

A power semiconductor module capable of reducing variation of inductance between upper/lower arms and reducing variation of current caused by the variation of inductance. The power semiconductor module includes circuit blocks (upper/lower arms) each of which is configured by connecting self-arc-extinguishing type semiconductor elements in series; a positive electrode terminal, a negative electrode terminal, and an AC terminal that are connected to each of the circuit blocks; and wiring patterns that connect the self-arc-extinguishing type semiconductor elements of the circuit blocks to the positive electrode terminal, the negative electrode terminal, and the AC terminal, wherein the circuit block is plural in number; the positive electrode terminal, the negative electrode terminal, and the AC terminal are each disposed to be plural in number corresponding to the circuit blocks; and the positive electrode terminals and the negative electrode terminals are closely disposed. 1. A power semiconductor module comprising:an upper/lower arm that is configured by connecting self-arc-extinguishing type semiconductor elements in series;a positive electrode side DC terminal, a negative electrode side DC terminal, and an AC terminal that are connected to the upper/lower arm; anda wiring pattern that connects the self-arc-extinguishing type semiconductor elements of the upper/lower arm to the positive electrode side DC terminal, the negative electrode side DC terminal, and the AC terminal, whereinthe upper/lower arm is plural in number;the positive electrode side DC terminal, the negative electrode side DC terminal, and the AC terminal are each disposed to be plural in number corresponding to the upper/lower arms; andthe positive electrode side DC terminals and the negative electrode side DC terminals are closely disposed.2. The power semiconductor module in claim 1 , whereinan outline of the power semiconductor module has a substantially quadrangular surface;the positive ...

SEMICONDUCTOR DEVICE AND POWER CONVERSION DEVICE USING THE SAME

In a semiconductor device such as a three-phase one-chip gate driver IC, HVNMOSs configuring two set and reset level shift circuits are disposed on non-opposed surfaces, and it is thereby possible to reduce the amount of electrons flowing into drains of HVNMOSs of another phase due to a negative voltage surge. Also, distances from an opposed surface on the opposite side to the respective drains of the HVNMOSs configuring the two set and reset level shift circuits are made equal to or more than 150 μm, and it is thereby possible to prevent a malfunction of a high side driver circuit of another phase to which no negative surge is applied. 1. A semiconductor device comprising:a plurality of second conductivity type first well regions, each surrounded by a first conductivity type region, which are provided spaced from one another on the front surface layer of a semiconductor substrate; and a first conductivity type second well region, provided in contact with all the plurality of first well regions, which configures the first conductivity type region and to which a low potential is applied, whereinthe plurality of first well regions each include: a high side driver circuit, provided on the front surface layer of the first well region, a potential on the low potential side of which is higher than the low potential; a second conductivity type pickup region, provided on the front surface layer of the first well region, to which is connected the high potential side of a power source of the high side driver circuit; a high voltage junction termination structure provided in the first well region between the second well region and the pickup region; and two level shift elements, each provided in one portion of the high voltage junction termination structure and second well region, which send signals for driving the high side driver circuit, andthe two level shift elements are disposed on respective non-opposed surfaces which are not opposite to the adjacent first well region, ...

THREE-LEVEL INVERTER

A series circuit of capacitors and a series circuit of semiconductor switches such as SiC-MOSFETs are connected in parallel to a direct current power source, and one end of a bidirectional switch formed of semiconductor switches, such as IGBTs, and diodes, such as SiC-SBDs (Silicon Carbide Schottky Barrier Diodes), is connected to a series connection point (an M point) of the capacitors, while the other end of the bidirectional switch is connected to a series connection point of the semiconductor switches, in a three-level inverter that outputs three voltage levels by operating the semiconductor switches so as to satisfy at least one of the condition that the peak value of an alternating current output voltage Vis a value of 80% or more of the voltage of the capacitors and the condition that an output power factor is 0.8 or more. 1. A three-level inverter , comprising:a first series circuit of a first semiconductor switch and a second semiconductor switch configured to control conduction/interruption of forward current when an on-signal or an off-signal is applied to a control terminal thereof, and which attain a conduction state for a reverse current, the first and second semiconductor switches of the first series circuit being connected together at a first series connection point, and connected in parallel to a direct current power source;a second series circuit of a first capacitor and a second capacitor connected together at a second series connection point, and connected in parallel to the first series circuit, the second series circuit being connected in parallel to the direct current power source;a bidirectional switch configured to control conduction/interruption of both forward and reverse currents, a first end thereof being connected to the first series connection point, a second end thereof being connected to the second series connection point, the bidirectional switch further including:a third semiconductor switch and a fourth semiconductor switch ...

POWER-OVER-ETHERNET POWERED INVERTER

An apparatus may include a data management assembly and a DC to AC inverter assembly. The data management assembly may include a data input, a data output, and a power port. The data management assembly may be configured to receive in combination a data signal and a variable DC input voltage on the data input, separate the received data signal from the input voltage, output the data signal on the data output, and output the input voltage on the power port. The DC to AC inverter assembly may be configured to receive the input voltage from the power port, boost the input voltage to a predetermined DC stepped-up voltage that is constant for different input voltages, convert the stepped-up voltage to an AC voltage, and output the AC voltage on a power output. 1. An apparatus comprising:an data management assembly including a data input, a data output, and a power port, the data management assembly being configured to receive in combination a data signal and a variable DC input voltage on the data input, separate the received data signal from the input voltage, output the data signal on the data output, and output the input voltage on the power port; anda DC to AC inverter assembly configured to receive the input voltage from the power port, boost the input voltage to a predetermined DC stepped-up voltage that is constant for different input voltages, convert the stepped-up voltage to an AC voltage, and output the AC voltage on a power output.2. The apparatus of claim 1 , wherein the DC to AC inverter assembly includes a boost converter and a controller circuit claim 1 , the boost converter being configured to step the input voltage up to a stepped-up voltage determined by a voltage-control signal claim 1 , and the controller circuit being responsive to an input-voltage signal representative of the input voltage to produce the voltage-control signal appropriate to cause the boost converter to step up the input voltage to the predetermined DC stepped-up voltage.3. The ...

DC SOURCE-TO-AC GRID TIE-IN POWER ENHANCEMENT USING MULTILEVEL INVERTER TOPOLOGY AND RESONANT MATRIX TANK CONVERTER

A high efficiency multi-mode power conversion device has DC-boost receiving input power from a DC (e.g., solar) source, a power inverter and an AC grid supply. Power conversion switches are arranged in a stacked configuration with controllable inner and outer switches conveying: in an non-inverting switched mode, an AC voltage from power from the AC grid supply; in an inverting outer switched mode, an AC voltage from power from the AC grid supply; and in an inverting outer and inner switched mode, an inverted voltage from power from the DC-boost circuit. At least one input switch and output to the AC grid supply is coupled to an output of the power inverter and a resonant circuit is coupled to the input switch. A rectifier and/or high voltage AC output tap is coupled to the resonant circuit and a controller is coupled to the power conversion switches and the input switch. 1. A multi-mode power conversion device , comprising:a DC-boost circuit configured to receive input power from a DC generating source;a power inverter coupled to an output of the DC-boost circuit and to an AC grid supply, having a plurality of power conversion switches arranged in a stacked configuration having controllable inner and outer switches; in an non-inverting switched mode, an AC voltage from power from the AC grid supply;', 'in an inverting outer switched mode, an AC voltage from power from the AC grid supply; and', 'in an inverting outer and inner switched mode, an AC inverted voltage from DC power boosted by the DC-boost circuit;, 'at least one output voltage from the power inverter, conveyingat least one of an input switch and an output to the AC grid supply, coupled to the at least one output voltage from the power inverter;a resonant circuit coupled to the input switch and configured for power amplification according to a resonant frequency operation of the input switch;at least one of a rectifier and high voltage AC output tap coupled to an output of the resonant circuit; anda ...

METHOD AND DEVICE FOR CONTROLLING OPERATION OF INVERTER

Provided are a method and a device for controlling an operation of an inverter. The method includes: determining whether a direct current side voltage of the inverter is greater than an operation voltage setting threshold; and if no, controlling the inverter to operate according to a five level control strategy; and if yes: adjusting the direct current side voltage by using a maximum power tracking algorithm; adjusting linearly a floating capacitor voltage of the inverter based on the adjusted direct current side voltage; determining whether the adjusted floating capacitor voltage is in a preset range; and if yes, controlling the inverter to operate according to a five level control strategy; and if no, controlling the inverter to operate according to a seven level control strategy. 1. A method for controlling an operation of an inverter , comprising:determining whether a direct current side voltage of the inverter is greater than an operation voltage setting threshold; andin a case that the direct current side voltage of the inverter is not greater than the operation voltage setting threshold, controlling the inverter to operate according to a five level control strategy; and adjusting the direct current side voltage by using a maximum power tracking algorithm;', 'adjusting linearly a floating capacitor voltage of the inverter based on the adjusted direct current side voltage;', 'determining whether the adjusted floating capacitor voltage is in a preset range, wherein the preset range ranges from a quarter of the operation voltage setting threshold minus a preset threshold to a quarter of the operation voltage setting threshold plus the preset threshold; and', 'controlling the inverter to operate according to a five level control strategy in a case that the adjusted floating capacitor voltage is in the preset range; and', 'controlling the inverter to operate according to a seven level control strategy in a case that the adjusted floating capacitor voltage is not in ...

POWER CONVERSION APPARATUS

Provided is a power conversion apparatus, including: a power module; a base section including a cooler; a second substrate; a first bus bar; a second bus bar; a smoothing capacitor; and a first substrate. The power module is placed on an upper surface of the base section. The first bus bar, the smoothing capacitor, and the first substrate are sequentially stacked on an upper side of the power module. The second substrate is arranged in an upright direction with respect to the base section and is fixed to the power module and the first substrate. 14.-. (canceled)5. A power conversion apparatus , comprising:a power module including a power semiconductor;a base section including a cooler adapted to cool the power module;a second substrate, on which a control circuit adapted to control the power module is mounted;a first bus bar adapted to supply power to the power module;a second bus bar adapted to output power from the power module;a smoothing capacitor adapted to smooth power of the first bus bar; anda first substrate including a signal wiring,wherein the power module is placed on an upper surface of the base section,wherein the first bus bar, the smoothing capacitor, and the first substrate are sequentially stacked on an upper side of the power module, andwherein the second substrate is arranged in an upright direction with respect to the base section and is fixed to the power module and the first substrate.6. The power conversion apparatus according to claim 5 , further comprising a third substrate including a current detecting portion adapted to detect a current of the second bus bar claim 5 ,wherein the first bus bar includes a pin extending upward, andwherein the third substrate has a cutout portion formed at a position corresponding to the pin.7. The power conversion apparatus according to claim 5 , wherein the smoothing capacitor is mounted on the first bus bar and is arranged between the power module and the first substrate.8. The power conversion apparatus ...

MEDICAL IMAGING DEVICE

A medical imaging device comprises an inverter with semiconductor switches for generating an AC voltage to be supplied to a load , a coil inductively coupled to a conductor of the inverter connected with a semiconductor switch of the inverter , and a monitoring circuit for monitoring a current in the conductor with a signal from the coil 1. A medical imaging device , comprising:an inverter with semiconductor switches for generating an AC voltage to be supplied to a load;a coil inductively coupled to a conductor of the inverter connected with a semiconductor switch of the inverter;a monitoring circuit for monitoring a current in the semiconductor switch with a signal from the coil;wherein the coil is inductively coupled to a conductor connected via bond wires to the semiconductor switch.2. The medical imaging device of claim 1 ,wherein the coil is a toroidal coil surrounding the conductor.3. The medical imaging device of claim 1 ,wherein the semiconductor switches comprise an IGBT,wherein the coil is inductively coupled to a conductor connected with the emitter or collector of the IGBT.4. The medical imaging device of claim 1 ,wherein the inverter comprises an inverter leg with at least two semiconductor switches;wherein the coil is coupled to an input of the inverter leg.5. The medical imaging device of claim 1 ,wherein a coil for current monitoring is inductively coupled to each inverter leg of the inverter.6. (canceled)7. The medical imaging device of claim 1 , further comprising:a semiconductor module housing at least one semiconductor switch;wherein the coil is inductively coupled with a conductor at an input of the semiconductor module.8. The medical imaging device of claim 7 ,wherein a supply line of the semiconductor module connected to the semiconductor module with a mechanical connector;wherein the mechanical connector is electrically conducting, and the coil is arranged around the mechanical connector.9. The medical imaging device of claim 8 ,wherein the ...

POWER CONVERTER

In a power converter, each of a positive busbar and a negative busbar includes a first current path that has a first thermal resistance and is a current flow path between a power-source connection terminal and at least one terminal connection portion, and a second current path that has a second thermal resistance and is a current flow path between the power-source connection terminal and an element connection portion. The first thermal resistance of the first current path of at least one of the positive busbar and the negative busbar is lower than the second thermal resistance of the second current path of the at least one of the positive busbar and the negative busbar. 1. A power converter comprising:at least one semiconductor module that has a power terminal and is electrically connected to a direct-current power source;a capacitor element electrically connected to the at least one semiconductor module;a positive busbar arranged to electrically connect between the direct-current power source and the at least one semiconductor module;a negative busbar arranged to electrically connect between the direct-current power source and the at least one semiconductor module;a cooling unit configured to cool the at least one semiconductor module,wherein: a power-source connection portion electrically connected to the direct-current power source;', 'an element connection portion electrically connected to the capacitor element;', 'at least one terminal connection portion electrically connected to the power terminal of the at least one semiconductor module;', 'a first current path that has a first thermal resistance and is a current flow path between the power-source connection terminal and the at least one terminal connection portion; and', 'a second current path that has a second thermal resistance and is a current flow path between the power-source connection terminal and the element connection portion,, 'each of the positive busbar and the negative busbar comprisesthe first ...

WELDING POWER SUPPLY WITH DIGITAL CONTROLLER

A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system. 1. A system comprising:power conversion circuitry comprising one or more power semiconductor switches, wherein the power conversion circuitry is configured to receive power from a primary source and to switch the one or more power semiconductor switches between an ON configuration and an OFF configuration to convert the received power to a welding output; anda pulse width modulated (PWM) digital controller coupled to the power conversion circuitry and configured to sample a current or voltage waveform during a period of the current or voltage waveform at a sample location approximately equal to an average of the current or voltage waveform that is determined based at least in part on data obtained during a previous period of the current or voltage waveform, and to communicate sampled current or voltage values to a weld controller.2. The system of claim 1 , wherein the PWM digital controller is configured to calculate a PWM output signal that controls switching of the one or more power semiconductor switches based at least in part on the sampled current or voltage values.3. The system of claim 2 , wherein the PWM digital controller is configured to update the PWM output signal once per switching cycle of the one or more power semiconductor switches after an approximate midpoint of an OFF portion of the switching cycle.4. The system of claim 1 , wherein the PWM digital ...

POWER CONVERTER FOR ELECTRIC VEHICLE

A vehicle is disclosed having a high voltage power source for operating high voltage devices, such as electric motors for propelling the vehicle. The high voltage devices are controlled by dedicated controllers paired with the devices and requiring low voltage power. The vehicle comprises one or more converters paired with the dedicated controller(s) and for converting high voltage power to low voltage power suitable for powering the controllers. 1. A vehicle comprising:a. a high voltage DC power source;b. at least one device designed to be powered by the high voltage power source;c. a dedicated controller paired with the at least one device for controlling the operation of the at least one device, said controller being designed to be powered by a low voltage power source;d. a converter paired with the dedicated controller for converting power from the high voltage power source to low voltage power for directly powering the controller.2. The vehicle of claim 1 , comprising a plurality of devices designed to be powered by the high voltage power source claim 1 , each of the devices designed to be powered by the high voltage power source being paired with a dedicated controller for controlling the operation of the device with which it is paired.3. The vehicle of claim 2 , wherein at least one of the devices is an electric motor claim 2 , and the controller with which the electric motor is paired is part of an inverter.4. The vehicle of claim 3 , wherein the electric motor is designed for propelling the vehicle.5. The vehicle of claim 4 , further comprising an electric motor for operating at least one of a water pump claim 4 , an air compressor claim 4 , a hydraulic pump claim 4 , or an air conditioning compressor.6. The vehicle of claim 1 , wherein the converter is an isolated or non-isolated step-down converter.7. The vehicle of claim 6 , wherein the converter has an operating high voltage range of from 150 V to 800 V.8. The vehicle of claim 6 , wherein the converter ...

POWER CONVERSION DEVICE

A power conversion device includes a semiconductor module, a cooling device, a case, which accommodates the semiconductor module and the cooling device, a connector, which is connected to an inlet pipe, which is a refrigerant flow pipe of the cooling device, and a sealing member, which seals between the inlet pipe and the connector. The connector includes a pipe portion, which communicates with the inlet pipe, and a flange portion, which is secured to the case. The pipe portion and the flange portion are joined to each other with the pipe portion located in an insertion hole of the flange portion. 1. A power conversion device comprising:a semiconductor module including a switching element;a cooling device including a heat exchanger capable of exchanging heat with the semiconductor module, an inlet pipe that introduces a refrigerant to the heat exchanger, and a discharge pipe that discharges the refrigerant from the heat exchanger;a case that accommodates the semiconductor module and the cooling device;a connector connected to a refrigerant flow pipe, which is at least one of the inlet pipe and the discharge pipe of the cooling device; anda sealing member that seals between the refrigerant flow pipe and the connector, whereinthe connector includes a pipe portion, which communicates with the refrigerant flow pipe, and a flange portion, which is secured to the case, and the pipe portion and the flange portion are joined to each other with the pipe portion located in an insertion hole of the flange portion,the connector includes an axial direction restricting section that restricts the pipe portion and the flange portion from relatively moving in an axial direction of the pipe portion, andthe axial direction restricting section includes at least one projection that projects radially outward on the pipe portion, and the at least one projection is located adjacent to an opening edge portion of the insertion hole of the flange portion.2. The power conversion device ...

POWER CONVERSION DEVICE

A power conversion device includes a connector and a sealing member. The connector is connected to a lead-in pipe of a cooling device on the outside of a case. The sealing member makes a watertight seal between a refrigerant flow pipe, which is the lead-in pipe, and the connector. The sealing member includes a connector-side tubular portion, a first watertight seal projection, and a second watertight seal projection. The connector-side tubular portion is located between an inner peripheral surface of the connector and an outer peripheral surface of the lead-in pipe. The first watertight seal projection projects radially outward in an annular shape from the connector-side tubular portion toward the inner peripheral surface of the connector. The second watertight seal projection projects radially inward in an annular shape from the connector-side tubular portion toward the outer peripheral surface of the lead-in pipe. 1. A power conversion device comprising:a semiconductor module including a switching element;a cooling device including a heat exchanger capable of exchanging heat with the semiconductor module, a lead-in pipe that introduces a refrigerant to the heat exchanger, and a discharge pipe that discharges the refrigerant from the heat exchanger;a case that accommodates the semiconductor module and the cooling device;a connector connected to a refrigerant flow pipe, which is at least one of the lead-in pipe and the discharge pipe of the cooling device on an outside of the case; anda sealing member that makes a watertight seal between the refrigerant flow pipe and the connector, whereinthe sealing member includes a connector-side tubular portion, which is located between an inner peripheral surface of the connector and an outer peripheral surface of the refrigerant flow pipe, a first watertight seal projection, which projects radially outward in an annular shape from the connector-side tubular portion toward the inner peripheral surface of the connector, and a ...

ALTERNATING CURRENT TO DIRECT CURRENT CONVERTER SYSTEM

An alternating current to direct current converter system includes an alternating current power supply, an external electronic load, a first MOS transistor, a first control module, a first switch and a second control module. The alternating current power supply includes a first output end and a second output end. The first control module controls the first MOS transistor to active when the first output end has a positive voltage and control the first MOS transistor to turn off when the second output end has a positive voltage. The first switch connects to a first end of the external electronic load and the second output end. The second control module connects to the first switch. The second control module controls the first switch to active when the second output end has a positive voltage and controls the switch to turn off when the first output end has a positive voltage. 1. An alternating current to direct current converter system comprising:an alternating current power supply system comprising a first output end and a second output end;an external electronic load having a first end and a second end;a first MOS transistor having a drain electrode, a source electrode and a gate electrode, the drain electrode of the first MOS transistor connected to the first output end of the alternating current power supply, and the source electrode of the first MOS transistor connected to the first end of the external electronic load;a first control module connected to the gate electrode of the first MOS transistor and the source electrode of the first MOS transistor, the first control module configured to control the drain electrode of the first MOS transistor to connect the source electrode of the first MOS transistor in event the first output end of the alternating current power supply has a positive voltage with respect to the alternating current power supply in a first half cycle, and control the drain electrode of the first MOS transistor to disconnect the source electrode ...

METHOD AND APPARATUS TO CONTROL AN INVERTER

An inverter electrically connected to an electric machine is described. A method for controlling switching in the inverter includes determining a torque output of the electric machine and determining a temperature related to an inverter cooling circuit. A preferred inverter switch control mode for controlling the inverter is selected based upon the torque output of the electric machine and the temperature related to the inverter cooling circuit. 1. A method for controlling switching in an inverter electrically connected to an electric machine , the method comprising:determining a torque output of the electric machine;determining a temperature related to an inverter cooling circuit; andselecting a preferred inverter switch control mode for controlling the inverter based upon the torque output of the electric machine and the temperature related to the inverter cooling circuit.2. The method of claim 1 , further comprising selecting the preferred inverter switch control mode for controlling the inverter based upon the torque output of the electric machine and the temperature only when a rotational speed of the electric machine is greater than a minimum threshold speed.3. The method of claim 1 , wherein selecting the preferred inverter switch control mode for controlling the inverter based upon the torque output of the electric machine and the temperature of the coolant circulated to the inverter comprises selecting a space-vector PWM mode when the temperature related to the inverter cooling circuit is less than a threshold temperature.4. The method of claim 1 , wherein selecting the preferred inverter switch control mode for controlling the inverter based upon the torque output of the electric machine and the temperature related to the inverter cooling circuit comprises selecting a discontinuous PWM mode when the temperature related to the inverter cooling circuit is greater than a threshold temperature.5. The method of claim 1 , further comprising:determining a ...

POWER SYSTEM CONTROLLING AND MONITORING POWER SEMICONDUCTOR DEVICES EMPLOYING TWO SERIAL SIGNALS

A power system includes a power semiconductor devices; a control circuit outputting first firing signals each being for a corresponding power semiconductor device, and outputting first activation response signals each being associated with a corresponding power semiconductor device. A first interface circuit cooperates with the control circuit to input a first serial signal and output the first firing signals, and to input the first activation response signals and output a second serial signal. A second interface circuit cooperates with a controller to input the second serial signal, to output to the controller second activation response signals corresponding to the first activation response signals, to input from the controller second firing signals corresponding to the first firing signals, and to output the first serial signal. The controller controls the power semiconductor devices with the second firing signals, and monitors the power semiconductor devices with the second activation response signals. 1. A power system comprising:a plurality of power semiconductor devices;a control circuit structured to output a plurality of first firing signals, each of said first firing signals being for a corresponding one of said power semiconductor devices, and to output a plurality of first activation response signals, each of said first activation response signals being associated with a corresponding one of said power semiconductor devices;a first interface circuit cooperating with said control circuit to input a first serial signal and output said first firing signals, and to input said first activation response signals and output a second serial signal;a controller; anda second interface circuit cooperating with said controller to input said second serial signal, to output to said controller a plurality of second activation response signals corresponding to said first activation response signals, to input from said controller a plurality of second firing signals ...

HIGH POWER CONTROL SYSTEM AND CONTROL METHOD THEREOF

A high power control system includes: a single energy source; an energy source management unit configured to manage the energy source; a controller configured to output a PWM control signal under control of the energy source management unit; a plurality of inverters configured to convert a direct current into an alternating current under control of the PWM control signal of the controller; a plurality of filters coupled to output terminals of the inverters; and a plurality of switches configured to regulate connections between the filters and a load under control of a regulation control signal of the controller. 1. A high power control system comprising:a single energy source;an energy source management unit configured to manage the energy source;a controller configured to output a PWM control signal under control of the energy source management unit;a plurality of inverters configured to convert a direct current into an alternating current under control of the PWM control signal of the controller;a plurality of filters coupled to output terminals of the inverters; anda plurality of switches configured to regulate connections between the filters and a load under control of a regulation control signal of the controller.2. The high power control system of claim 1 , wherein the load is connected to a system.3. The high power control system of claim 1 , wherein when a second inverter is to be additionally operated in a state where a first inverter of the plurality of inverters is operated claim 1 , the controller first applies the PWM control signal to the second inverter claim 1 , and then applies a regulation control signal for operation to a second switch connected to the output terminal of the second inverter.4. The high power control system of claim 1 , wherein when a second inverter is to be stopped in a state where a first inverter and the second inverter among the plurality of inverters are operated claim 1 , the controller first applies a regulation control ...

Power Converter

An object of the invention is to further improve connection reliability of internal components of a power converter. According to the invention, there is provided a power converter including a power semiconductor module that converts DC current into AC current; a casing that forms a housing space for housing the power semiconductor module; an AC relay bus bar that is connected to an AC terminal of the power semiconductor module by weld connection; and an AC terminal block that is connected to an AC terminal of a motor, wherein the AC relay bus bar is supported by the casing through an insulating member, and the AC terminal block, is connected to the AC relay bus bar and supported by the casing. 1. A power converter comprising:a power semiconductor module that converts DC current into AC current;a casing that forms a housing space for housing the power semiconductor module;an AC relay bus bar that is connected to an AC terminal of the power semiconductor module by weld connection; andan AC terminal block that is connected to an AC terminal of a motor,wherein the AC relay bus bar is supported by the casing through an insulating member, andwherein the AC terminal block is connected to the AC relay bus bar and supported by the casing.2. The power converter according to claim 1 ,wherein the AC terminal block includes an AC bus bar that is connected to the AC relay bus bar by mechanical connection and a resin block that supports the AC bus bar,wherein the AC relay bus bar is configured of a metal material different from that of the AC bus bar, andwherein a volume of the AC relay bus bar is smaller than a volume of the AC bus bar.3. The power converter according to claim 2 ,wherein a thickness of the AC relay bus bar is formed to be greater than a thickness of the AC terminal of the power semiconductor module.4. The power converter according to claim 1 ,wherein the AC relay bus bar forms a first through hole,{'b': '750', 'wherein the first through hole is an elliptical ...