Устройство управления трехфазным выпрямительно-инверторным модулем

Реферат Устройство управления трехфазным выпрямительно-инверторным модулем Полезная модель относится к классу устройств преобразовательной техники и может быть использована при создании систем бесперебойного питания и частотного управления электродвигателями. Устройство управления трехфазным выпрямительно-инверторным модулем содержит комплект транзисторного инвертора, микроконтроллер, буферный дискретный каскад, два цифровых интерфейса, импульсный регулятор напряжения, блок опторазвязки, дискретные входы команд, трехпроводную внутреннюю информационную двунаправленную последовательную шину обмена с мультиплексированием, знакосинтезирующий OLED дисплей, цифро-аналоговый преобразователь, аппаратный ШИМ контроллер вращения фаз, линейный стабилизатор питания, компаратор защиты, восьмиканальный аналого-цифровой преобразователь, блок гальванической изоляции драйверов инвертора, датчик входного тока, датчик напряжения в звене постоянного тока, блок гальванической развязки, термодатчик инвертора, драйвер силовых ключей инвертора. Дополнительно введены комплект выпрямителя, силовой вход которого подключен к клеммам трехфазной питающей сети, а выход ко входу комплекта транзисторного инвертора, термодатчик выпрямителя, выход которого подключен ко входу восьмиканального аналого-цифрового преобразователя, датчики входного напряжения, входы которого подключены к клеммам питающей сети, а выход подключен ко входу восьмиканального аналого-цифрового преобразователя, датчики входного тока, входы которого подключены к клеммам питающей сети, а выход ко входу восьмиканального аналого-цифрового преобразователя, датчик постоянного тока, вход которого подключен к выходу комплекта выпрямителя, а выход подключен ко входу восьмиканального аналого-цифрового преобразователя драйвер силовых ключей выпрямителя, вход которого подключен к выходу блока гальванической изоляции драйверов выпрямителя, а выходы подключены к информационным входам комплекта выпрямителя, датчик выходного тока, входы которого ...

Method for operating a polyphase machine having a pulse-width-modulated inverter

A method for operating a polyphase machine having a pulse-width-modulated inverter, having the steps: determining a setpoint current value respectively for a current in the longitudinal direction and/or the transverse direction based on a specified torque, ascertaining a setpoint voltage value respectively for a voltage in the longitudinal direction and/or the transverse direction with the aid of the setpoint current value and/or of an actual current value determined at the pulse-width-modulated inverter, controlling and/or regulating the polyphase machine corresponding to the ascertained setpoint voltage value. In this context it is provided that, in addition, using a model, a model value is determined respectively for the voltage in the longitudinal direction and/or the transverse direction, the difference between the setpoint voltage value and the model value is ascertained, and in response to the exceeding of a specifiable maximum difference, an error signal is triggered.

DC-AC Inverter Assembly, in Particular Solar Cell Inverter

A DC-AC inverter assembly, in particular a solar cell inverter of a photovoltaic plant, is disclosed. The inverter includes a semiconductor bridge circuit and wherein a DC chopper controller is provided for creating half-waves of an AC voltage on the output side and the bridge circuit is connected downstream of the DC chopper controller and acts as pole changer on the half-waves.

METHOD OF SHOOT-THROUGH GENERATION FOR MODIFIED SINE WAVE Z-SOURCE, QUASI-Z-SOURCE AND TRANS-Z-SOURCE INVERTERS

This invention belongs into the field of power electronics and semiconductor converter control and pertains to the method of shoot-through generation for modified sine wave Z-source, quasi-Z-source and trans-Z-source inverters. The inverter can be controlled using either the modified sine wave pulse-width modulation or phase-shift modulation method. There are three methods for shoot-through generation in the case of modified sine wave control: by overlapping active states, during the freewheeling state and during the zero state. 1. A method of modified sine wave control of an inverter , said method comprising: adding shoot-through states to at least one control signal , wherein said inverter is selected from the group of inverters consisting of single-phase or multi-phase Z-source , quasi-Z-source and trans-Z-source inverters.2. A method according to claim 1 , wherein a switching frequency of the inverter is fixed and the pulse width is modulated.3. A method according to claim 2 , wherein said shoot-through states are generated by overlapping active states.4. A method according to claim 2 , wherein said shoot-through states are generated during freewheeling states.5. A method according to claim 2 , wherein said shoot-through states are generated during zero states.6. A method according to claim 5 , wherein said at least one control signal comprises the control signals of upper and lower transistors periodically interchanged to equalise switching losses.7. A method according to claim 1 , wherein pulse widths and switching frequency of the inverter are fixed and the mutual phase angle of the control signals of switching elements is modulated.8. A method according to claim 7 , wherein said shoot-through states are generated during zero states. This invention belongs in the field of power electronics and semiconductor converter control and pertains to the methods of shoot-through generation for modified sine wave Z-source, quasi-Z-source and trans-Z-source inverters.Z- ...

DIFFERENTIAL PROTECTION METHOD FOR BRIDGE CIRCUIT IN CURRENT CONVERTER CONTROL SYSTEM

The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time. 1. Differential protection method for bridge circuit in current converter control system , being characterized in that , the differential protection method includes the steps of:1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively;{'sub': '1', '2), calculating the value of current at the AC side of the current converter control system by the step of: the value being ktimes of the sum of three absolute values of sample values;'}3). Determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system by the step of:{'sub': d', 'v', '2, 'if |I−i>k, performing a relay protection;'}{'sub': 1', 'd', 'v', '2, 'wherein, kis a value including (0,1), Iis an actual measured value of direct current side of the current converter control system, iis a current value of AC side, and kis a set value greater than 0.'}2. The differential ...

SWITCHING POWER CONVERTERS CONTROLLED WITH CONTROL SIGNALS HAVING VARIABLE ON-TIMES

A control circuit is configured to sense an AC input voltage of a power factor correction (PFC) power circuit in a switching power converter, provide a control signal having an on-time and an off-time to at least one power switch of the PFC power circuit, and in response to detecting a peak voltage of the AC input voltage, increase the on-time of the control signal based on the sensed AC input voltage during an interval that begins with the peak voltage of the AC input voltage and ends with the next zero crossing following the peak voltage of the AC input voltage to improve a power factor of the switching power converter. Other example switching power converters, PFC power circuits and control circuits for controlling one or more power switches are also disclosed. 1. A switching power converter comprising:a power factor correction (PFC) power circuit controllable to improve a power factor of the switching power converter, the PFC power circuit including at least one power switch and an input for receiving an AC input voltage and an AC input current; anda control circuit coupled to the PFC power circuit to control the at least one power switch, the control circuit configured to sense the AC input voltage of the PFC power circuit, provide a control signal having an on-time and an off-time to the at least one power switch, and in response to detecting a peak voltage of the AC input voltage, increase the on-time of the control signal based on the sensed AC input voltage during an interval that begins with the peak voltage of the AC input voltage and ends with the next zero crossing following the peak voltage of the AC input voltage to improve the power factor of the switching power converter.2. The switching power converter of wherein the control circuit is configured to increase the on-time of the control signal during the entirety of said interval.3. The switching power converter of wherein the control circuit is configured to increase the on-time of the control ...

INRUSH CURRENT SUPPRESSION DEVICE AND MOTOR DRIVE DEVICE

An inrush current suppression device is an inrush current suppression device that suppresses an inrush current flowing from a DC power supply through a mechanical switch, and includes: a first capacitor having one end connected to a positive terminal of the DC power supply through the mechanical switch; a semiconductor switching element connected to the other end of the first capacitor and a negative terminal of DC power supply between the other end of the first capacitor and the negative terminal of the DC power supply; a resistance element connected in parallel to the semiconductor switching element; and a control circuit for controlling the semiconductor switching element. The control circuit has a first output port, and controls ON time and OFF time of the semiconductor switching element by outputting a PWM signal from the first output port to the semiconductor switching element after the mechanical switch is closed. 1. An inrush current suppression device for suppressing an inrush current flowing from a DC power supply through a mechanical switch , the device comprising:a first capacitor having one end connected to a positive terminal of the DC power supply through the mechanical switch;a semiconductor switching element connected to another end of the first capacitor and a negative terminal of the DC power supply between the other end of the first capacitor and the negative terminal of the DC power supply;a resistance element connected in parallel to the semiconductor switching element; anda control circuit for controlling the semiconductor switching element,wherein the control circuit has a first output port, and controls ON time and OFF time of the semiconductor switching element by outputting a pulse width modulation (PWM) signal from the first output port to the semiconductor switching element after the mechanical switch is closed.2. The inrush current suppression device according to claim 1 , further comprising a delay circuit connected to the first output ...

SYSTEM AND METHOD FOR AC POWER CONTROL

A power-control device comprises an energy-import portion and an energy-export portion. The power-control device may additionally include a general processing and power supply circuit providing linear control of the power-control device's production of power to the load. The energy-import portion is coupled between a Vterminal and a load terminal, and is capable of importing energy to the load terminal during a first portion and a third portion of an alternating voltage Vwaveform. The energy-export portion is coupled between the load terminal and a NEU terminal, and is capable of exporting energy from the load terminal during a second portion and a fourth portion of the alternating voltage Vwaveform. The first, second, third and fourth portions of the alternating voltage Vwaveform are equal to a period of the alternating voltage Vwaveform and respectively are consecutive during the period of the alternating voltage Vwaveform. The power-control device provides variable power control to the load terminal in response to a variable on/off time of a PWM control signal. 1. A power-control device , comprising:{'sub': 'LINE', 'a Vterminal, a load terminal and a neutral (NEU) terminal;'}{'sub': LINE', 'AC', 'AC', 'LINE, 'an energy-import portion coupled between the Vterminal and the load terminal, the energy-import being capable of importing energy to the load terminal during a first portion and a third portion of an alternating voltage Vwaveform if the alternating voltage Vis coupled between the Vterminal and the NEU terminal; and'}{'sub': AC', 'AC', 'LINE', 'AC', 'AC, 'an energy-export portion coupled between the load terminal and the NEU terminal, the energy-import portion being capable of exporting energy from the load terminal during a second portion and a fourth portion of the alternating voltage Vwaveform if the alternating voltage Vis coupled between the Vterminal and the NEU terminal, the first, second, third and fourth portions of the alternating voltage VAC ...

OVERCURRENT DETECTION REFERENCE COMPENSATION SYSTEM OF SWITCHING ELEMENT FOR INVERTER AND OVERCURRENT DETECTION SYSTEM USING THE SAME

An overcurrent detection reference compensation system of a switching element for an inverter and an overcurrent detection system using the same can correct an overcurrent detection reference used to detect an overcurrent of a switching element according to a temperature of the switching element. 1. An overcurrent detection reference compensation system for an inverter , comprising:a switching module having a plurality of switching elements which are connected in series;a temperature detector configured to detect a temperature of each of the switching elements;a correction reference determiner configured to calculate a difference between a set reference temperature and the temperature of at least one of the switching elements detected by the temperature detector, and determine a correction reference according to the calculated difference; anda detection reference corrector configured to correct an overcurrent detection reference of each of the switching elements using the correction reference.2. The overcurrent detection reference compensation system of claim 1 , wherein the temperature detector includes:a diode module which is disposed in a housing in which the switching elements are embedded and receives a constant current; anda temperature estimator configured to estimate, when the constant current is supplied to the diode module, the temperature of each of the switching elements on the basis of a voltage across both terminals of the diode module.3. The overcurrent detection reference compensation system of claim 2 , wherein the temperature estimator estimates the temperature of each of the switching elements using a temperature determination map in which the voltage across both terminals of the diode module is an input and the temperature of each of the switching elements is an output.4. The overcurrent detection reference compensation system of claim 1 , wherein the correction reference determiner includes:a gain selector configured to determine a correction ...

Adaptively modulated multi-state inverter system and modulating method thereof

The present invention provides an adaptively modulated multi-state inverter system, comprising: a split capacitor, four bridge arms and an isolation switch group, on each of the four bridge arms a pair of complementary power switch groups is arranged; the isolation switch group comprises four fuses and six bidirectional thyristors. The output branches of the first bridge arm, the second bridge arm and the third bridge arm are respectively connected in series with a fuse to output a three-phase voltage, and at three-phase output voltage side two shared auxiliary branches are arranged, one auxiliary branch starts from the fourth bridge arm output branch on which a fuse is connected in series and is then connected to the output terminal of the three-phase voltage via three bidirectional thyristors. The other auxiliary branch starts from the DC side feed branch from the midpoint of the split capacitor, and is connected with the output terminal of the three-phase voltage via three bidirectional thyristors respectively. The invention also provides a modulating method of the multi-state inverter system. The use of the adaptive modulating technology enables the multi-state inverter to have the functions of overcurrent protection, isolation of faulty bridge arms and fault-tolerant control on any single and double bridges. 1. An adaptively modulated multi-state inverter system , comprising: a split capacitor , a first bridge arm , a second bridge arm , a third bridge arm , a fourth bridge arm and an isolation switch;wherein on each of the first, second and third bridge arms a pair of complementary power switch groups is arranged;the isolation switch group comprises a first fuse, a second fuse, a third fuse and a fourth fuse as well as a first bidirectional thyristor, a second bidirectional thyristor, a third bidirectional thyristor, a fourth bidirectional thyristor, a fifth bidirectional thyristor and a sixth bidirectional thyristor;on each output branch of the first bridge ...

POWER CONVERSION DEVICE

Each of a plurality of specified chopper cells which are some of a plurality of chopper cells included in each leg circuit in a power conversion device is configured as a full bridge. A control device controls operations of first and second switching elements of each specified chopper cell based on a circulating current which circulates through each leg circuit. The control device controls operations of third and fourth switching elements of each specified chopper cell based on a voltage of a capacitor of the specified chopper cell. 1. A power conversion device which converts power between a DC circuit and an AC circuit , the power conversion device comprising: [ a plurality of converter cells cascaded to one another and each including an energy storage; and', 'at least one inductor connected in series to the plurality of converter cells,, 'each leg circuit including, a capacitor as the energy storage;', 'first and second switching elements connected in parallel to the capacitor and connected in series to each other; and', 'third and fourth switching elements connected in parallel to the capacitor and connected in series to each other,, 'each of a plurality of specified converter cells which are some of the plurality of converter cells included in each leg circuit including, 'the capacitor being capable of being charged and discharging through a connection node of the first and second switching elements and a connection node of the third and fourth switching elements; and, 'a plurality of leg circuits which correspond to respective phases of the AC circuit and are connected in parallel between common first and second DC terminals,'}a control device which controls operations of the plurality of converter cells included in each leg circuit,the control device controlling operations of the first and second switching elements of each specified converter cell based on a circulating current which circulates through each leg circuit,the control device controlling operations ...

SEMICONDUCTOR DEVICE

The present invention is directed to provide a semiconductor device capable of protecting a switching element even though having a capacitor connected to a control signal input terminal of the switching element. Semiconductor device includes an IGBT including a gate configured to be input a gate signal and a current detection terminal used to detect at least one of overcurrent or short-circuit current, a gate capacitor arranged between the gate and a reference potential terminal, the gate capacitor being disconnected from the gate as needed, and a disconnection unit configured to disconnect a connection between the gate capacitor and the gate when a detection current being a current output from the current detection terminal is equal to or larger than a first current set on a basis of a minimum current causing oscillation in a loop circuit formed by including the IGBT and the gate capacitor.

Resonant-mode power supply with a multi-winding inductor

A resonant-mode power supply, comprising an assembly of switches connected in a bridge or a half-bridge configuration, a series resonant circuit connected in the bridge or half bridge diagonal, a part of which is formed by a multi-winding inductor by means of which a load is connected, and a controller configured to stabilize output voltages or currents by controlling the switching frequency of the assembly of switches. The series resonant circuit comprises an energy recirculation circuit (ERC1) for limiting the resonant circuit quality factor, connected through the diode rectifier (DR2) to the supply voltage node and a current monitoring circuit (CMC) configured to monitor the recirculation circuit current (Ilim) and, by means of the controller (C), to change the switching frequency of the assembly of switches (K1, K2, K3, K4) in order to reduce power supplied to the resonant circuit upon exceeding the threshold value by the current (Ilim) in the energy recirculation circuit (ERC1).

High Power Grid System with Thyristor Controls

A line commutated converter (LCC) for a high voltage direct current power converter, the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system, each bridge circuit comprising a plurality of arms, each associated with a respective phase of an AC system, each arm comprising: an upper thyristor valve or valves, and lower thyristor valve or valves connected in series; an associated branch extending from between the upper and lower thyristors; and at least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors. 1. A line commutated converter , LCC , for a high-voltage , direct current , HVDC , power converter , the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system , each bridge circuit comprising a plurality of arms , each associated with a respective phase of an AC system , each arm comprising:an upper thyristor valve or valves, and lower thyristor valve or valves connected in series;an associated branch extending from between the upper and lower thyristors; andat least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors:wherein each thyristor-based capacitor module further comprises a plurality of subsidiary capacitors and a plurality of inductors; andwherein the subsidiary capacitors and inductors are operable to form a plurality of at least two L-C oscillation circuits within the thyristor-based capacitor module.2. The LCC of wherein the current rating of the at least one thyristor-based capacitor module is as high as that of ...

IMPROVEMENTS IN OR RELATING TO LINE COMMUTATED CONVERTERS

In the field of high voltage direct current (HVDC) power transmission a line commutated converter () includes a plurality of converter limbs (A, B, C) that extend between first and second DC terminals (). Each converter limb (A, B, C) includes first and second limb portions () that are separated by an AC terminal (). The first limb portions () together define a first limb portion group () and the second limb portions () together define a second limb portion group (). Each limb portion () includes at least one switching element () in the form of a latching device (). Each latching device () is configured to turn on and conduct current when it is forward biased and it receives a turn on signal, to naturally turn off and no longer conduct current when it is reverse biased and the current flowing through it falls to zero, and to actively turn off and prevent current from flowing therethrough when it receives a turn off signal. The line commutated converter () also includes a control unit () that is programmed to control switching of the latching devices (). The control unit (), during normal operating conditions, successively sends a first latching device () in a respective pair of first and second latching devices () in one of the first limb portion group () or the second limb portion group () a turn on signal whereby the first latching device () turns on and begins to conduct current while the current flowing through the second latching device () begins to fall to zero and the second latching device prepares to naturally turn off. The control unit (), in the event of abnormal operating conditions arising, sends a turn off signal to the or each latching device () experiencing an abnormal current flow therethrough to actively turn it off and prevent current from flowing therethrough. 1. A line commutated converter , for use in high voltage DC power transmission , comprising:a plurality of converter limbs extending between first and second DC terminals, each converter ...

MOBILE HIGH VOLTAGE GENERATING DEVICE

A mobile high voltage generating device for providing power to an X-ray apparatus, includes a power supply unit including a battery and an isolated DC-DC converter electrically coupled with the battery; an energy storage unit, electrically coupled to the isolated DC-DC converter of the power supply d a voltage conversion unit coupled between the energy storage unit and a radiation source of the X-ray apparatus; wherein the isolated DC-DC converter includes: a first inverter circuit coupled to a battery, a first rectifier circuit coupled to the energy storage unit, a first transformer including a primary winding and a secondary winding. The primary winding is coupled to the first inverter circuit and the secondary winding is coupled to the first rectifier circuit. 1. A mobile high voltage generating device for providing power to an X-ray apparatus , comprising:a power supply unit comprising a battery and an isolated DC-DC converter electrically coupled with the battery;an energy storage unit, electrically coupled to the isolated DC-DC converter of the power supply unit; anda voltage conversion unit, electrically coupled to the energy storage unit and a radiation source of the X-ray apparatus.2. The mobile high voltage generating device of claim 1 , wherein the isolated DC-DC converter further comprises a first inverter circuit claim 1 , a first transformer having a primary winding and a secondary winding claim 1 , and a first rectifier circuit; wherein the first inverter circuit is electrically coupled to the battery claim 1 , and the primary winding of the first transformer is electrically coupled to the first inverter circuit claim 1 , and the secondary winding of the first transformer is electrically coupled to the first rectifier circuit claim 1 , and the first rectifier circuit is electrically coupled to the energy storage unit.3. The mobile high voltage generating device of claim 2 , wherein the first inverter circuit is a full bridge circuit.4. The mobile high ...

Thyristor starter

A converter controller configured to control a firing phase of a converter includes an integral element integrating a deviation of DC current from a current command value and generates a voltage command value of output voltage of the converter by performing control calculation of the deviation. In a first mode of performing commutation of an inverter by intermittently setting DC current to zero, the converter controller sets DC current to zero for a predetermined pause time by narrowing a phase control angle simultaneously with a commutation command for the inverter. When the control calculation is resumed immediately after the pause time, the converter controller uses a control amount calculated in control calculation immediately before the pause time as a preset value of the integral element immediately after the pause time.

STATION-HYBRID HIGH VOLTAGE DIRECT CURRENT SYSTEM AND METHOD FOR POWER TRANSMISSION

A high voltage direct current (HVDC) transmission system comprises a first terminal comprising a first voltage source converter (VSC) having a first and second VSC terminals and a first line commutated converter (LCC) having first and second LCC terminals; a second terminal comprising a second VSC having third and fourth VSC terminals and a second LCC having third and fourth LCC terminals; and a transmission line pair comprising a positive transmission line that couples the first VSC terminal and the first LCC terminal of the first VSC and the first LCC, respectively, to the third VSC terminal and the third LCC terminal of the second VSC and the second LCC, respectively, and a second positive line that couples the second VSC terminal and the second LCC terminal of the first VSC and the first LCC, respectively, to the fourth VSC terminal and the fourth LCC terminal of the second VSC and the second LCC, respectively.

POWER CONVERTER

A capacitor has a parasitic inductance component and is electrically connected between a positive line and a negative line. A converter includes a reactor provided in the positive line and performs voltage conversion of a DC voltage smoothed by a capacitor. An inverter performs DC-AC conversion between the converter and an AC motor by switching control. A path of the positive line which connects a DC power supply and the capacitor has an inductance smaller than an inductance of a path of the negative line which connects the DC power supply and the capacitor. A difference between the inductance of the path and the inductance of the path is less than twice the parasitic inductance component. 1. A power converter comprising:a positive terminal and a negative terminal that receive power supplied from a DC power supply;a first power line electrically connected with a first terminal among the positive terminal and the negative terminal;a second power line electrically connected with a second terminal among the positive terminal and the negative terminal;a smoothing capacitor having a parasitic inductance component and electrically connected between the first power line and the second power line;a converter including a reactor provided in the first power line, the converter performing voltage conversion of a DC voltage smoothed by the smoothing capacitor; andan inverter that performs DC-AC conversion between the converter and an AC load by switching control, whereina first path of the first power line has an inductance smaller than an inductance of a second path of the second power line,the first path connects the first terminal and the smoothing capacitor,the second path connects the second terminal and the smoothing capacitor, anda difference between the inductance of the second path and the inductance of the first path is less than twice the parasitic inductance component of the smoothing capacitor.2. The power converter according to claim 1 , further comprising an ...

POWER STORAGE SYSTEM, APPARATUS AND METHOD FOR CONTROLLING CHARGE AND DISCHARGE, AND PROGRAM

The charging and discharging control apparatus is an apparatus that controls charging and discharging of a power storage apparatus. The power storage apparatus is connected to an AC power line and is connectable to a specific load without involving the AC power line. The AC power line is connected to a power system, is connected to a direct-current power line through a DC/AC conversion apparatus (PV-PCS), and is connectable to a general load. The charging and discharging control apparatus includes an acquisition unit that acquires information on a direction of a current in the AC power line, and a control unit that supplies electric power to the power storage apparatus when a current is flowing from the AC power line to the power system. 1. A power storage system comprising:a power storage unit; anda control unit that controls charging and discharging of the power storage unit,wherein the power storage unit is connected to an AC power line and is capable of supplying electric power to a specific load without involving the AC power line,the AC power line is connected to a power system, is connected to a DC power generation apparatus through a DC/AC conversion apparatus, and is connectable to a general load, andthe control unit supplies electric power to the power storage unit when a current is flowing from the AC power line to the power system.2. The power storage system according to claim 1 ,wherein the control unit supplies the electric power discharged from the power storage unit to the specific load during a predetermined time zone.3. The power storage system according to claim 2 ,wherein the control unit supplies the electric power supplied from the power system to the specific load, except during a predetermined time zone.4. The power storage system according to claim 1 ,wherein the control unit causes the power storage unit to supply electric power to the specific load when a current is flowing from the power system to the AC power line.5. The power storage ...

Electronic device and method for determing at least one characteristic parameter of a connection set connected between a converter and an electric machine, related power supply chain and computer program

An electronic determination device for determining at least one characteristic parameter of a connection set connected between a converter and an electric machine; the converter comprising at least two output terminals and, for each output terminal, a switching branch including at least one converter switch; the connection set comprising a filter connected to the output terminals and a cable connected between the filter and the electric machine; the filter including, for each output terminal, a respective electromagnetic coil connected to said output terminal and a respective capacitor connected to said coil; the determination device comprising: for each output terminal, a device switch configured to be connected to the respective capacitor; a generation module configured to generate a voltage pulse through the connection set, by controlling the converter switches and each device switch; an acquisition module configured to acquire measurements of respective current(s) and voltage(s) through the filter, further to the generation of the respective voltage pulse; and a calculation module configured to calculate at least one characteristic parameter of the connection set according to the respective current(s) and voltage(s) measurements.

POWER CONVERSION APPARATUS

Provided is a power conversion apparatus including a charger including a primary-side circuit and a secondary-side circuit supplied with power; and a capacitor disposed on a first power line, in which power from the secondary-side circuit is smoothened by the capacitor to be supplied to a battery, and power from the battery is smoothened by the capacitor to be supplied to an inverter. 1. A power conversion apparatus , comprising:a charger including a primary-side circuit supplied with power of a first voltage and a secondary-side circuit supplied with power of a second voltage lower than the first voltage; anda capacitor disposed on a first power line electrically connecting the secondary-side circuit with an inverter and a battery, whereinpower from the secondary-side circuit is smoothened by the capacitor to be supplied to the battery, and power from the battery is smoothened by the capacitor to be supplied to the inverter.2. The power conversion apparatus according to claim 1 , wherein the capacitor is disposed on the inverter side on the first power line relative to a branching point branched from a power line connecting the secondary-side circuit with the battery to the inverter.3. The power conversion apparatus according to claim 1 , wherein the power conversion apparatus is installed on a vehicle claim 1 , and wherein an operation of the charger for charging power from a power supply outside the vehicle to the battery installed on the vehicle and an operation of the inverter for driving a motor for driving the vehicle to run by using power from the battery are mutually exclusive.4. The power conversion apparatus according to claim 1 , wherein capacitance of the capacitor is smaller than a total of capacitance required for smoothening power from the secondary-side circuit and capacitance required for smoothening power for the inverter.5. The power conversion apparatus according to claim 1 , wherein capacitance of the capacitor is equal to capacitance required ...

SUBMODULE AND ELECTRICAL ARRANGEMENT HAVING SUBMODULES

An electrical configuration contains at least one submodule which has a first and a second outer electrical terminal. The configuration further has a bypass switching device, which is electrically connected between the first and second terminals and in the on-state causes an electrical short-circuit in at least one current flow direction between the two outer terminals. The bypass switching device has a thyristor with an anode terminal, a cathode terminal and a trigger terminal and is connected by its anode terminal to one of the two outer terminals and by its cathode terminal to the other of the two outer terminals. A triggering device is connected to the trigger terminal of the thyristor for triggering the thyristor, and a switch is provided which in the on-state connects the anode terminal of the thyristor to the trigger terminal of the thyristor. 1. An electrical configuration , comprising:at least one submodule having a first outer electrical terminal and a second outer electrical terminal; a thyristor having an anode terminal, a cathode terminal and a trigger terminal and is connected by said anode terminal to one of said first and second outer electrical terminals of said submodule and by said cathode terminal to another of said first and second outer electrical terminals of said submodule;', 'a triggering device connected to said trigger terminal of said thyristor, for triggering said thyristor; and', 'a switch, which in an on-state connects said anode terminal of said thyristor to said trigger terminal of said thyristor., 'at least one bypass switching device electrically connected between said first and second outer electrical terminals of said submodule and in an on-state causes an electrical short-circuit in at least one current flow direction between said first and second outer electrical terminals of said submodule, said bypass switching device containing2. The electrical configuration according to claim 1 , further comprising a control device claim 1 ...

POWER CONVERTER

A third power supply circuit subjects a reference voltage to DC-DC conversion to generate a power supply voltage common to a second driver circuit for driving a second switching device and a fourth driver circuit for driving a fourth switching device. Wirings from a substrate on which the third power supply circuit is provided to a substrate on which the second driver circuit and the fourth driver circuit are provided are used by the third power supply circuit to supply the power supply voltage commonly to the second driver circuit and the fourth driver circuit. A first impedance device, a second impedance device, a third impedance device, and a fourth impedance device are provided in a substrate on which the second driver circuit and the fourth driver circuit are provided. 1. A power converter comprising:an inverter circuit including a first arm and a second arm connected in parallel and converting a DC power into an AC power, the first arm including a first switching device and a second switching device connected in series, the second arm including a third switching device and a fourth switching device connected in series;a first power supply circuit that subjects a reference voltage to DC-DC conversion to generate a power supply voltage for a first driver circuit for driving the first switching device;a second power supply circuit that subjects the reference voltage to DC-DC conversion to generate a power supply voltage for a third driver circuit for driving the third switching device;a third power supply circuit that subjects the reference voltage to DC-DC conversion to generate a power supply voltage common to a second driver circuit for driving the second switching device and a fourth driver circuit for driving the fourth switching device, whereinwirings from a substrate on which the third power supply circuit is provided to a substrate on which the second driver circuit and the fourth driver circuit are provided are used by the third power supply circuit to ...

POWER CONVERSION APPARATUS

A power conversion apparatus includes: DC input terminals for inputting a DC voltage; AC output terminals for outputting an AC voltage; a switching element; a first resonant capacitance connected across the switching element; a first LC resonance circuit that has an inductance and a capacitance connected in series and is connected together with the switching element between the AC output terminals; and a second LC resonance circuit connected in series together with the switching element between the DC input terminals. The second LC resonance circuit includes a first connector portion connected to one DC input terminal and a second connector portion connected to the switching element, and has a first current path, which includes an inductance, and a second current path, which includes a series circuit with an inductance and a capacitance, formed between the first connector portion and the second connector portion. 1. A power conversion apparatus comprising:plus and minus direct current (DC) input terminals into which a DC voltage is inputted;two alternating current (AC) output terminals that output an AC voltage;a switching element;a first resonant capacitance connected between both ends of the switching element;a first LC resonance circuit that is connected in series together with the switching element between the AC output terminals; anda second LC resonance circuit connected in series together with the switching element between the DC input terminals,wherein the first LC resonance circuit includes a current path including a series circuit with an inductance and a capacitance, andthe second LC resonance circuit which includes a first connector portion connected to one DC input terminal out of the two DC input terminals and a second connector portion connected to the switching element, and has a first current path, which includes an inductance, and a second current path, which includes a series circuit with an inductance and a capacitance, formed between the first ...

ELIMINATION OF COMMUTATION FAILURE BY HYBRID HVDC SYSTEM

A line commutated converter, LCC, for a high-voltage, direct current, HVDC, power converter comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises a plurality of arms, and each arm is associated with a respective phase of an AC system. Each arm comprises an upper and lower thyristor connected in series, an associated branch extending from between the upper and lower thyristors, and at least one capacitor module for each phase. The, or each capacitor module is operable to insert a capacitor into the respective arm of the bridge circuit. 1. A line commutated converter , LCC , for a high-voltage , direct current , HVDC , power converter , the LCC comprising at least one bridge circuit for connection to at least one terminal of a DC system , each bridge circuit comprising a plurality of arms , each associated with a respective phase of an AC system , each arm comprising:an upper and lower thyristor connected in series;an associated branch extending from between the upper and lower thyristors; andat least one capacitor module for each phase, the or each capacitor module operable to insert a capacitor into the respective arm of the bridge circuit.2. The LCC of claim 1 , wherein the capacitor modules are operable to insert a first capacitor into the bridge circuit during a first commutation period claim 1 , wherein commutation is provided from a first initially conducting thyristor in a first initially conducting arm to a first subsequently conducting thyristor in a first subsequently conducting arm.3. The LCC of claim 2 , wherein the capacitor modules are operable to insert the first capacitor into the first initially conducting arm to increase an effective commutation voltage claim 2 , thereby reducing a current flowing through the first initially conducting thyristor and charging the capacitor.4. The LCC of claim 3 , wherein the capacitor modules are operable to insert the first capacitor into the ...

High frequency high power converter system

A high frequency high power converter system comprises: a plurality of resonant tank circuits arranged in parallel, a plurality of transformers, each transformer having a single primary winding and a plurality of secondary windings, and a vacuum electronic device, the output of each resonant tank circuit being applied to a respective different transformer and the outputs of the transformers being arranged to drive the vacuum electronic device.

MULTILEVEL POWER CONVERTER

A multilevel power converter has at least one phase module with a plurality of modules (____) connected between first and second DC voltage connections. The phase module has a first phase module branch connected to the first DC voltage connection, and a second phase module branch connected to the second DC voltage connection. Each of the modules has at least two electronic switching elements and an electric energy storage unit. A third phase module branch connects the first phase module branch to the second phase module branch. A switching device connects an AC voltage connection of the multilevel power converter to a first connection node between the first phase module branch and the third phase module branch in a first switch position and connects the AC voltage connection to a second connection node between the third phase module branch and the second phase module branch in a second switch position. 120-. (canceled)21. A multilevel power converter , comprising:a first DC voltage terminal, a second DC voltage terminal, an AC voltage terminal, and at least one phase module connected between said first and second DC voltage terminals;said at least one phase module having a plurality of modules, said plurality of modules respectively having at least two electronic switching elements and an electrical energy storage device;said at least one phase module including a first phase module branch connected to said first DC voltage terminal, a second phase module branch connected to said second DC voltage terminal, and a third phase module branch connecting said first phase module branch to said second phase module branch;a switching device configured, in a first switch position, to connect said AC voltage terminal to a first connection point between said first phase module branch and said third phase module branch and, in a second switch position, to connect said AC voltage terminal to a second connection point between said third phase module branch and said second phase ...

Interface for renewable energy system

An improved interface for renewable energy systems is disclosed for interconnecting a plurality of power sources such as photovoltaic solar panels, windmills, standby generators and the like. The improved interface for renewable energy systems includes a multi-channel micro-inverter having novel heat dissipation, novel mountings, electronic redundancy and remote communication systems. The improved interface for renewable energy systems is capable of automatic switching between a grid-tied operation, an off grid operation or an emergency power operation.

DC BUS RIPPLE REDUCTION

An electrical motor system and a method for operating the electrical motor system are disclosed. The electrical motor system comprises a direct current (DC) source, a filter connected in parallel with the DC source and an electric motor with at least two sets of windings. A voltage signal is provided from the DC source to the inverter circuit where the signal is modulated. The modulated signal is then supplied from the inverter circuit to each set of windings with a respective time offset between each set of windings respectively, providing a very efficient DC bus ripple reduction. Hereby, it is e.g. possible to use small filter capacitors/capacitor banks in electrical motor systems. 1. A method for controlling an electrical motor system comprising a direct current (DC) source , a filter connected in parallel with the DC source and an electric motor with at least two sets of windings , said method comprising the steps of:providing a voltage signal from the DC source to an inverter circuit via conductors, said conductors having an inductance;modulating said voltage signal in the inverter circuit;supplying a time shifted modulated signal, to each of said at least two sets of winding with a time offset between each set of windings respectively, wherein said time offset is based on the period of a resonance frequency, said resonance frequency being dependent on a capacitance of said filter and the inductance of said conductors.2. The method according to claim 1 , wherein the method further comprises a step of determining the resonance frequency by measuring the resonance frequency of the system.3. The method according to wherein the resonance frequency of the system is predetermined.4. The method according to claim 1 , wherein the time offset is dependent on a ratio between the period of the resonance frequency and the number of sets of windings comprised by the electric motor.5. The method according to claim 1 , wherein the step of modulating said voltage signal in the ...

Method and Apparatus for Providing Adaptive Inductor Peak Current in DC-DC Converter

A DC-DC converter providing adaptive peak current control is disclosed. A DC-DC converter includes an inductor having first and second terminals coupled to a voltage source and a transistor, respectively. The DC-DC circuit further includes a control circuit configured to control activation of the transistor. A first control block of the control circuit controls the transistor (and thus the inductor peak current) using pulse frequency modulation (PFM). A second control block controls the transistor using pulse width modulation (PWM) and PFM. In a first mode of operation, the control circuit activates the transistor, using PFM, such that the peak-to-peak current through the inductor has a fixed value. In a second mode of operation, the control circuit activates the transistor such that the peak-to-peak current through the inductor is modulated, using both PWM and PFM. 1. A circuit comprising:an inductor having a first terminal coupled to an input voltage source;a transistor coupled between a second terminal of the inductor and a ground node; anda control circuit configured to control activation of the transistor, the control circuit comprising a first control block configured to control the transistor using pulse frequency modulation (PFM), and a second control block configured to control the transistor using pulse width modulation (PWM) and PFM;wherein, during operation in a first mode, the control circuit is configured to control the transistor, using PFM, such that a peak-to-peak current through the inductor has a fixed value, and wherein, during operation in a second mode, the control circuit is configured to modulate the peak-to-peak current through the inductor, using PWM and PFM.2. The circuit of claim 1 , wherein the control circuit is configured to cause operation in one of the first and second modes based at least in part on a comparison of a feedback voltage to a first threshold and a second threshold.3. The circuit of claim 2 , wherein the first control ...

Detecting resonance frequency in llc switching converters from primary side

Embodiments includes systems, methods, and apparatuses for determining a resonant frequency of an LLC converter via a primary side of the LLC converter. In one embodiment, a circuit comprises an LLC converter and a resonant frequency determination unit, the resonant frequency determination unit configured to monitor electrical current on the primary side of the LLC converter, isolate a portion of the electrical current, determine, based on the portion of the electrical current, a crossing point, and determine, based on the crossing point, a resonant frequency of the LLC converter.

Electric motor control apparatus

The purpose is to suppress ripple of voltage between terminals of smoothing condenser. Electric motor control apparatus is electric motor control apparatus that controls electric motor system having electrical power converter, smoothing condenser and three-phase AC electric motor, and has generating device that generates modulation signal by adding third harmonic signal to phase voltage command signal; controlling device that controls operation of electrical power converter by using modulation signal; and adjusting device that adjusts amplitude of third harmonic signal, adjusting device adjusts amplitude of third harmonic signal so that peak value of voltage between terminals of smoothing condenser in the case where amplitude of third harmonic signal is adjusted is smaller than peak value of voltage between terminals in the case where amplitude of third harmonic signal is not adjusted.

POWER SUPPLY HAVING FOUR QUADRANT CONVERTER AND TECHNIQUES FOR OPERATION

A power supply, including a primary pre-converter, coupled to supplying mains, configured to receive an AC voltage at low frequency and output a high DC voltage, and further configured to receive the high DC voltage and to output the alternating current; a primary converter, disposed on a primary side of the power supply, coupled to the high DC voltage from the primary pre-converter; an isolating transformer to receive the high frequency AC voltage and output a high frequency secondary AC voltage, and to receive a high frequency secondary AC current and to output primary high frequency AC current; and an output converter, on a secondary side of the power supply, wherein the output converter is configured to receive high frequency AC voltage from the isolating transformer and to output a DC voltage of a first or second polarity to an output, and wherein the output converter is configured to receive DC current of a first or second direction from the output and to output a high frequency AC current to the isolating transformer. 1. A method of operating a switched mode power supply , comprising:providing a primary converter on a primary side of the switched mode power supply, the primary converter arranged to output a high frequency AC voltage and to rectify high frequency AC current;providing an output converter, the output converter disposed on a secondary side of the switched mode power supply and coupled to the primary converter through an isolating transformer; andsynchronizing operation of the primary converter and the output converter, wherein the switched mode power supply operates in four different modes of operation.2. The method of claim 1 , wherein:a first mode of operation comprises power delivery to a load where an output voltage has a first polarity and an output current has a first direction and where the power delivery is controlled by means of the primary converter,a second mode of operation comprises power recovery from the secondary side to the ...

High Power Density Inverter (I)

The present invention relates to a single phase, non-insulated, miniaturized DC/AC power inverter ( 1 ) having an output power density higher than 3000 W/dm 3 , wherein said first (S 1 _H), second (S 1 _L), third (S 2 _H) and fourth (S 2 _L) switches are made of wide-band semiconductors and preferably of gallium nitride or GaN semiconductors; and wherein said DC/AC power inverter ( 1 ) further comprises: a ripple-compensating active filter comprising a third half-bridge ( 203 ) having a fifth switch (S 3 _H) in series with a sixth switch (S 3 _L), said fifth switch (S 3 _H) being connected at one end to the positive terminal (L+) of the DC input, said sixth switch (S 3 _L) being connected at one end to the negative terminal (L−) of the DC input,the other end of the fifth switch (S 3 _H) being connected to the other end of the sixth switch (S 3 _L), defining a third common end, said third common end being connected to a first end of a LC filter, made of at least one inductor (L 6 ) and one storage capacitor (C 5 ), a second end of the LC filter being connected to the negative terminal (L−); modulation control means of said first (S 1 _H), second (S 1 _L), third (S 2 _H), fourth (S 2 _L), fifth (S 3 _H) and sixth (S 3 _L) switches for providing a switch frequency comprised between 20 and 500 kHz and allowing variable phase shifts between any two of said first ( 201 ), second ( 202 ) and third ( 203 ) half-bridges and allowing dead time modulation of the switches of said half-bridges ( 201, 202, 203 ), so that to obtain a switching approaching ZVS switching, in particular to obtain switching when current crosses through zero and further to cancel switching losses and so that to allow high peak-to-peak voltage variations in the active filter, while storing corresponding energy in the storage capacitors (C 5 ), wherein the Y-capacitors of the common mode noise filter ( 100 ), are referenced to a shielding being at a reference potential, said shielding being insulated ...

Modular embedded multi-level converter

A method for power conversion includes coupling a first string to a second string via a first connecting node and a second connecting node to form at least one leg of a power converter. The first string is operatively coupled across a first bus and a second bus and comprises a first branch and a second branch coupled via a third connecting node. The first branch and the second branch include a plurality of controllable semiconductor switches. Furthermore, the second string comprises a first chain link and a second chain link coupled via an alternating current phase bus and includes a plurality of switching units. The first chain link and/or the second chain link are controlled to generate a negative voltage across at least one of the plurality of controllable semiconductor switches during a switch turn off process.

VARIABLE MUTUAL OFF TIME CONTROL FOR AUTOMOTIVE POWER CONVERTER

An automotive power converter may be controlled by detecting a magnitude of current output by a phase leg of the automotive power converter, selecting a mutual off time for switches of the phase leg according to the magnitude, and generating pulse width modulation signals for the switches having the mutual off time to operate the switches to transfer power between a traction battery and electric machine. 1. An automotive vehicle comprising:a traction battery;an electric machine;an inverter configured to transfer power between the traction battery and electric machine, and including a pair of switches defining a phase leg for the electric machine; anda controller configured to complementarily operate the switches with respective pulse width modulated signals that each have a duty cycle and collectively define a mutual off time between pulses, wherein the mutual off time varies according to a magnitude of current output by the phase leg such that as the magnitude increases, the mutual off time increases while the duty cycle remains constant and as the magnitude decreases, the mutual off time decreases while the duty cycle remains constant.2. The automotive vehicle of further comprising a sensor configured to detect the magnitude of current.3. The automotive vehicle of claim 3 , wherein the controller is further configured to select the mutual off time according to the magnitude.4. The automotive vehicle of claim 1 , wherein the electric machine is a motor.5. The automotive vehicle of claim 1 , wherein the electric machine is a generator.6. A method for controlling an automotive power converter claim 1 , the method comprising:detecting a magnitude of current output by a phase leg of the automotive power converter, wherein the phase leg is defined by a pair of switches;selecting a mutual off time according to the magnitude; andgenerating pulse width modulation signals for the switches having the mutual off time to transfer power between a traction battery and electric ...

Medium voltage transformerless multilevel converter and method for controlling a medium voltage transformerless multilevel converter

A multilevel converter includes single phase configurations. A single phase configuration has a first half-bridge (HB) module, a second HB module separated by a first capacitor coupled to a DC link, and a neutral point clamped (NPC) module clamped to the first HB module and the second HB module. Further, the single phase configuration has a first individual switching device and a second individual switching device, the first individual switching device operably connected to the first HB module and the NPC module, and the second individual switching device operably connected to the second HB module and the NPC module. The converter further includes a power output assembly comprising multiple phases and providing multiple-phase alternating (AC) power, wherein the single phase configuration supplies power to one of the multiple phases of the power output assembly.

PULSE WIDTH MODULATION METHOD

A locus of integrals, in terms of time, of unit voltage vectors forms a loop within a period shorter than a reciprocal of a maximum value of an operating frequency, in terms of electrical angle, of a compressor motor, the unit voltage vectors being voltage vectors that are units composing an instantaneous space vector indicating voltage which an inverter for driving the compressor motor outputs except in a dead time period. 19-. (canceled)10. A pulse width modulation method in which a locus of integrals , in terms of time , of unit voltage vectors forms a loop within a period shorter than a reciprocal of a maximum value of an operating frequency , in terms of electrical angle , of a compressor motor , said unit voltage vectors being voltage vectors that are units composing an instantaneous space vector indicating voltage which an inverter for driving said compressor motor outputs except in a dead time period.11. The pulse width modulation method according to claim 10 , whereinsaid loop is formed by a locus of integrals, in terms of time, of at least three types of non-zero voltage vectors that are said voltage vectors having non-zero magnitudes.12. The pulse width modulation method according to claim 10 , whereinsaid period is a control cycle for said inverter.13. The pulse width modulation method according to claim 11 , whereinsaid period is a control cycle for said inverter.14. The pulse width modulation method according to claim 10 , whereinan increase in a magnitude of said loop or an increase in a frequency of occurrence of said loop increases a heating value of said compressor motor.15. The pulse width modulation method according to claim 11 , whereinan increase in a magnitude of said loop or an increase in a frequency of occurrence of said loop increases a heating value of said compressor motor.16. The pulse width modulation method according to claim 12 , whereinan increase in a magnitude of said loop or an increase in a frequency of occurrence of said loop ...

DEVICE AND METHOD FOR PROTECTING POWER CIRCUIT OF BASE STATION IN WIRELESS COMMUNICATION SYSTEM

The purpose of the present disclosure is to protect a power circuit of a base station in a wireless communication system, the base station comprising: at least one module for processing a signal; and the power circuit for supplying power to the at least one module. The power circuit comprises a transformer, a rectifier circuit and a smoothing circuit, and the power circuit reduces the ratio of an on-section of the rectifier circuit if a reverse current from the at least one module is detected. 1. An apparatus for a base station in a wireless communication system , the apparatus comprising:at least one module for processing a signal; anda power circuit for supplying power to the at least one module,wherein the power circuit comprises a transformer, a rectifier circuit and a smoothing circuit, andif detecting reverse current from the at least one module, the power circuit step-by-step reduces a ratio of an on duration of the rectifier circuit.2. The apparatus of claim 1 , wherein the rectifier circuit comprises a first transistor and a second transistor claim 1 , andthe power circuit comprises a control circuit which generates pulse width modulation (PWM) signals for controlling operations of the first transistor and the second transistor.3. The apparatus of claim 2 , wherein the control circuit sequentially reduces a duty ratio of the PWM signals claim 2 , while the reverse current occurs.4. The apparatus of claim 3 , wherein claim 3 , if a current value flowing on a path between a secondary coil of the transformer and the at least one module is smaller than or equal to a reference value claim 3 , the control circuit determines occurrence of the reverse current.5. The apparatus of claim 3 , wherein claim 3 , if the reverse current dissipates claim 3 , the control circuit restores the duty ratio to a normal state.6. A method for operating a base station in a wireless communication system claim 3 , the method comprising:detecting reverse current from at least one ...

Switching power supply device, switching power supply control method, and electronic apparatus

A switching power supply device includes a switching element to which a DC input is supplied, a frequency control circuit which controls a switching frequency of the switching element, a frequency detection circuit which detects the switching frequency of the switching element, and a duty ratio control circuit which controls a switching duty ratio based on the frequency detected by the frequency detection circuit. The duty ratio control circuit controls the switching duty ratio such that the switching frequency becomes an approximately maximum frequency.

Systems and Methods for Isolated Low Voltage Energy Storage for Data Centers

Systems and methods of this disclosure use low voltage energy storage devices to supply power at a medium voltage from an uninterruptible power supply (UPS) to a data center load. The UPS includes a low voltage energy storage device (ultracapacitor/battery), a high frequency (HF) bidirectional DC-DC converter, and a multi-level (ML) inverter. The HF DC-DC converter uses a plurality of HF planar transformers, multiple H-bridge circuits, and gate drivers for driving IGBT devices to generate a medium DC voltage from the ultracapacitor/battery energy storage. The gate drivers are controlled by a zero voltage switching (ZVS) controller, which introduces a phase shift between the voltage on the primary and secondary sides of the transformers. When the primary side leads the secondary side, the ultracapacitor/battery discharges and causes the UPS to supply power to the data center, and when the secondary side leads the primary side, power flows from the grid back to the UPS, thereby recharging the ultracapacitor/battery. 1. A power source comprising: a low voltage energy storage device;', 'a first H-bridge circuit coupled to the low voltage energy storage device;', 'a high frequency transformer, a primary side of the high frequency transformer being coupled to the first H-bridge circuit; and', 'a second H-bridge circuit coupled to a secondary side of the high frequency transformer., 'a plurality of DC-DC converter circuits coupled together, each DC-DC converter circuit comprising2. The power source of claim 1 , further comprising:a first plurality of switching device drivers coupled to the first H-bridge circuit;a second plurality of switching device drivers coupled to the second H-bridge circuit; anda controller coupled to the first plurality of switching device drivers and the second plurality of switching device drivers, the controller configured to control the first plurality of switching device drivers and the second plurality of switching device drivers to charge or ...

Space vector modulation for matrix converter and current source converter

A converter includes a transformer including primary windings and secondary windings, switches connected to the primary windings, an output inductor connected to the secondary windings, and a controller connected to the switches. The controller turns the switches on and off based on dwell times calculated using space vector modulation with a reference current {right arrow over (I)} ref whose magnitude changes with time.

DEVICE FOR DETECTING OUTPUT CURRENT OF INVERTER

Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector. 1. A device for detecting an output current of an inverter configured to control a power system , comprising:a shunt resistor connected to an output end of a capacitor of a direct current (DC) link;a detector connected to the shunt resistor and configured to detect the output current; anda controller configured to control a sampling timing of a current in the detector,wherein the controller compares a length of an effective vector regarding a switching voltage with a preset value and modulates the length of the effective vector.2. The device of claim 1 , wherein the shunt resistor is connected to a low potential side.3. The device of claim 1 , wherein the controller samples the current at a timing that is delayed by a set time based on a median of the length of the effective vector.4. The device of claim 1 , wherein the controller modulates the length of the effective vector with a value that is greater than a time at which a current by the effective vector is stabilized.5. The device of claim 3 , wherein the controller determines the delayed timing as a value that is greater than a half of the time at which the current by the effective vector is stabilized. Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2017-0035041 filed on Mar. 21, 2017, in the Korean Intellectual Property Office, the disclosure of which is hereby incorporated by reference in its entirety.The present disclosure relates to a device for detecting an output current of ...

POWER CONVERSION SYSTEM

A power conversion system includes: an output terminal connected to a load; a switch configured to be turned on in a first case that an AC voltage from the AC power supply is normal, and to be turned off in a second case that the AC voltage from the AC power supply is abnormal; a power converter configured to convert the AC power from the AC power supply into DC power and store the DC power in a storage battery in the first case, and to convert the DC power in the storage battery into AC power and output the AC power to the output terminal in the second case; and a line-commutated inverter configured to operate in synchronization with an AC voltage appearing at the output terminal, and convert the DC power supplied from a fuel cell into AC power and output the AC power to the output terminal. 1. A power conversion system configured to receive alternating current (AC) power supplied from an AC power supply and direct current (DC) power supplied from a DC power supply , and supply AC power to a load , the power conversion system comprising:an output terminal connected to the load;a switch having a first terminal receiving the AC power supplied from the AC power supply, and a second terminal connected the output terminal, the switch being configured to be turned on in a first case where an AC voltage from the AC power supply is normal, and to be turned off in a second case where the AC voltage from the AC power supply is abnormal;a power converter configured to convert the AC power supplied from the AC power supply through the switch into DC power and store the DC power in a power storage device in the first case, and to convert the DC power in the power storage device into AC power and output the AC power to the output terminal in the second case; anda line-commutated inverter configured to operate in synchronization with an AC voltage appearing at the output terminal, and convert the DC power supplied from the DC power supply into AC power and output the AC power to ...

SWITCHING AN ELECTRICAL VOLTAGE SOURCE CONVERTER

An electrical converter with at least two output phases includes a rectifier and a thyristor-based inverter interconnected by a DC link with an inductor, wherein the thyristor-based inverter includes a half-bridge with at least two half-bridge arms for each output phase of the electrical converter and each arm being provided by a thyristor. A method for switching the electrical converter includes: cyclically switching the thyristors of the inverter, such that at least one time instant, two thyristors of different half-bridge arms are switched on simultaneously, such that a pulse number, which determines at how many time instants thyristors of the inverter are switched during one stator voltage period, is lower than the number of half-bridge arms of the inverter. 1. A method for switching an electrical converter with at least two output phases , the electrical converter comprising a rectifier and a thyristor-based inverter interconnected by a DC link with an inductor , the thyristor-based inverter comprising a half-bridge with at least two half-bridge arms for each output phase of the electrical converter and each arm being provided by a thyristor , the method comprising:during a normal pulse operation mode, cyclically switching the thyristors of the inverter such that a pulse number, which determines at how many time instants thyristors of the inverter are switched during one stator voltage period, is equal to the number of half-bridge arms of the inverter;during a low pulse operation mode, cyclically switching the thyristors of the inverter, such that at least one time instant, two thyristors of different half-bridge arms are switched on simultaneously, such that the pulse number is lower than the number of half-bridge arms of the inverter;estimating a stator frequency of an electrical machine supplied by the electrical converter;switching between the normal operation mode and the low pulse operation mode based on the stator frequency.2. The method of claim 1 , ...

APPARATUS AND METHOD FOR CHARGING BATTERY OF VEHICLE

An apparatus for charging a battery for a vehicle, includes a PFC circuit including a rectifier for rectifying an AC power to a DC power, and a link capacitor for smoothing the rectified DC power, a bidirectional DC-DC converter including a first switch for converting the DC power of the PFC circuit to an AC power, a transformer for boosting or reducing a voltage of the AC power converted at the first switch, and a second switch for rectifying an AC power from the transformer to a DC power, and a controller configured to control a phase of a PWM signal applied to the second switch such that the link capacitor is charged by an electrical power from the battery, when a voltage of the link capacitor is below a predetermined voltage prior to entering the battery charging mode. 1. An apparatus for charging a battery for a vehicle , comprising: a rectifier configured to rectify an AC power applied from a commercial AC power source to a DC power in a battery charging mode for charging the battery for the vehicle; and', 'a link capacitor connected in parallel to the rectifier and configured to smooth the rectified DC power;, 'a power factor correction (PFC) circuit comprising a first switch configured to convert a DC power applied from the PFC circuit to an AC power;', 'a transformer configured to boost or reduce a voltage of the AC power converted at the first switch; and', 'a second switch configured to rectify an AC power applied from the transformer to a DC power to charge the battery for the vehicle; and, 'a bidirectional DC-DC converter comprisinga controller configured to control a phase of a pulse width modulation (PWM) signal applied to the second switch such that the link capacitor is charged by an electrical power discharged from the battery for the vehicle, when a voltage of the link capacitor is below a predetermined reference voltage prior to entering the battery charging mode.2. The apparatus of claim 1 , wherein the second switch comprises:a first MOSFET;a ...

SWITCHING ELEMENT DRIVING DEVICE

A switching element driving device for driving first and second switching elements of a half bridge circuit, the first and second switching elements being respectively formed in upper and lower arm units of the half bridge, and having respectively first and second freewheeling diodes connected thereto in antiparallel. The switching element driving device includes upper and lower arm driving circuits respectively configured to output first and second driving signals for driving the first and second switching elements, and a drive capability decision circuit configured to, responsive to turning on of the first switching element, set drive capability of the first driving signal to a first level and to change the drive capability of the first driving signal to a second level upon detecting a reverse recovery current of the second freewheeling diode of the second switching element, the first level being higher than the second level. 1. A switching element driving device for driving first and second switching elements of a half bridge circuit , the first and second switching elements being respectively formed in an upper arm unit and a lower arm unit of the half bridge , and having respectively a first freewheeling diode and a second freewheeling diode connected thereto in antiparallel , the switching element driving device comprising:an upper arm driving circuit configured to output a first driving signal for driving the first switching element;a lower arm driving circuit configured to output a second driving signal for driving the second switching element; anda drive capability decision circuit configured to, responsive to turning on of the first switching element, set drive capability of the first driving signal to a first level and to change the drive capability of the first driving signal to a second level upon detecting a reverse recovery current of the second freewheeling diode of the second switching element, the first level being higher than the second level.2. ...

MODULAR POWER SUPPLY SYSTEM

A modular power supply system includes: a main controller, configured to output a main control signal; N local controllers, wherein each of the local controllers is configured to receive the main control signal to output at least one local control signal; and N power units, in one-to-one correspondence with the N local controllers, wherein each of the power units includes a first end and a second end, and the second end of each of the power units is connected to the first end of an adjacent one of the power units, each of the power units is configured to include M power converters, each of the power converters is configured to operate according to the local control signal, wherein the same local control signal controls the power semiconductor switches at an identical position in at least two of the M power converters to be simultaneously turned on and off. 1. A modular power supply system , configured to comprise:a main controller, configured to output a main control signal;N local controllers, wherein each of the local controllers is configured to receive the main control signal to output at least one local control signal; andN power units, in one-to-one correspondence with the N local controllers, wherein each of the power units comprises a first end and a second end, and the second end of each of the power units is connected to the first end of an adjacent one of the power units, each of the power units is configured to comprise M power converters, wherein each of the power converters comprises a third end and a fourth end, the fourth end of each of the power converters is connected to the third end of an adjacent one of the power converters, and the third end of a first one of the power converters is connected to the first end of the power unit, the fourth end of an M-th one of the power converters is connected to the second end of the power unit, and each of the power converters is configured to operate according to the local control signal output by a ...

Auxiliary resonant commutated pole converter with voltage balancing circuit

A resonant power converter is provided. The resonant power converter comprises a balancing circuit for balancing the voltage in a feeding connection. The balancing circuit comprises: a first positive control means in series with an inductor, wherein the first positive control means and the inductor is coupled between the positive DC conductor and the feeding connection, and a second negative control means in series with the inductor, wherein the second negative control means are coupled between the negative DC conductor and the feeding connection. The first positive and second negative control means are adapted to be alternatingly switched on and off for balancing the resonant power converter, such that the voltage in the feeding connection is substantially the mean voltage of the positive DC conductor and the negative DC conductor.

Semiconductor power conversion apparatus and output current control method

Provided is a semiconductor power conversion apparatus that includes: a semiconductor power converter that performs power conversion by using switching elements and supplies power to a load; a converter-voltage command calculation unit that outputs a voltage command value Vref that controls the semiconductor power converter; a voltage control unit that superimposes a second voltage command value on the voltage command value Vref to generate a voltage command value Vref 2 ; a PWM-signal generation unit that generates a gate signal for controlling driving of the switching elements based on the voltage command value Vref 2 and outputs the gate signal; and a bypass unit that is connected to the semiconductor power converter in parallel with the load and branches a current of a frequency of the second voltage command value off from an output current Iout that is output from the semiconductor power converter to the load.

Normal workflow and deviations therefrom

A normal workflow including a plurality of steps may be defined by exemplary systems and methods for use in preparing a treatment, performing a treatment, and performing post-treatment processes. A user may be guided by one or more workflow affordances to indicate where and how to use a graphical user interface to follow the normal workflow. When a user deviates from the normal workflow, one or more deviation workflow affordances may be displayed on the graphical user interface to guide a user back to the normal workflow.

CONVERTER CELL WITH REDUCED POWER LOSSES, HIGH VOLTAGE MULTILEVEL CONVERTER AND ASSOCIATED METHOD

It is presented a converter cell () arranged to be used in a high voltage multilevel converter. The converter cell comprises: an energy storage element () and a plurality of switching elements (S, . . . , S). The plurality of switching elements comprises at least one thyristor (S; S) and a plurality of transistors (S, S, S; S, S, S). Each one of the at least one thyristor (S; S) is provided in a position for a switching element in the converter cell where, during normal operation of the converter cell, the at least one thyristor is in a continuous conducting state. This reduces the power losses of the converter cell. A corresponding multilevel converter and a method are also presented. 111.-. (canceled)12. A converter cell configured for use in a high voltage multilevel converter , the converter cell comprising:an energy storage element; anda plurality of switching elements,wherein the plurality of switching elements comprises at least one thyristor and a plurality of transistors, and each thyristor of the converter cell is provided in a position for a switching element in the converter cell where, during normal operation of the converter cell, said switching element in the converter cell is in a continuous conducting state.13. The converter cell according to claim 12 , wherein normal operation is operation when the converter cell is not in a failure mode.14. The converter cell according to claim 12 , wherein the at least one thyristors are respectively provided in every topological position for a switching element in the converter cell where claim 12 , during normal operation of the converter cell claim 12 , the switching element is in a continuous conducting state.15. The converter cell according to claim 12 , wherein each one of the at least one thyristor is an Integrated gate-commutated Thyristor claim 12 , IGCT.16. The converter cell according to claim 12 , wherein each one of the plurality of transistors is an insulated gate bipolar transistor claim 12 , IGBT. ...

ASSEMBLY AND METHOD FOR DISCHARGING HIGH-VOLTAGE CIRCUIT OF POWER INVERTER

An assembly and a method for discharging a high voltage circuit of a power inverter which can automatically detect, when connection to the power inverter is interrupted, a dangerous state due to high energy accumulated in the power inverter and remove the danger as rapid as possible, and which can reduce power loss and the number of required corresponding components. The assembly includes a logic unit. The logic unit includes first input units which are coupled to a voltage sensor and a current sensor, and an output unit which outputs a discharge control signal. The output unit is coupled to an input unit of a means for triggering circuit breakers. The means for triggering the circuit breakers includes output units for outputting a driver signal. The output units are coupled to at least one of the circuit breakers of the half bridge. 1. An assembly for discharging a high-voltage circuit of a power inverter having an intermediate circuit capacitor , the assembly comprising:a means for discharging the high-voltage circuit indirectly coupled to an input unit of the power inverter,a logic unit automatically detecting interruption of a connection between the input unit of the power inverter and a power supply line coupled to the input unit, wherein the logic unit includes first input units coupled to a current sensor disposed between the input unit and a high-voltage input unit of a half bridge, wherein the logic unit includes an output unit for outputting a discharge control signal, the output unit coupled to an input unit of a means for triggering circuit breakers of the half bridge,{'b': '2', 'the means for triggering the circuit breakers () including output units for outputting a driver signal, and wherein the output units of the means for triggering the circuit breakers are coupled to at least one of the circuit breakers of the half bridge.'}2. The assembly according to claim 1 , wherein the means for triggering the circuit breakers is coupled to circuit breakers of ...

POWER SUPPLY HAVING FOUR QUADRANT CONVERTER AND TECHNIQUES FOR OPERATION

A power supply, including a primary pre-converter, coupled to supplying mains, configured to receive an AC voltage at low frequency and output a high DC voltage, and further configured to receive the high DC voltage and to output the alternating current; a primary converter, disposed on a primary side of the power supply, coupled to the high DC voltage from the primary pre-converter; an isolating transformer to receive the high frequency AC voltage and output a high frequency secondary AC voltage, and to receive a high frequency secondary AC current and to output primary high frequency AC current; and an output converter, on a secondary side of the power supply, wherein the output converter is configured to receive high frequency AC voltage from the isolating transformer and to output a DC voltage of a first or second polarity to an output, and wherein the output converter is configured to receive DC current of a first or second direction from the output and to output a high frequency AC current to the isolating transformer. 1. A power supply , comprising:a primary pre-converter, the primary pre-converter coupled to receive power from supplying mains, and configured to receive an alternating current (AC) voltage at low frequency and output a high DC voltage, and further configured to receive the high DC voltage and to output the alternating current;a primary converter, the primary converter disposed on a primary side of the power supply and coupled to the high DC voltage from the primary pre-converter;an isolating transformer coupled to receive a high frequency AC voltage from the primary converter and output a high frequency secondary AC voltage, and coupled to receive a high frequency secondary AC current and to output primary high frequency AC current; andan output converter, the output converter being disposed on a secondary side of the power supply, wherein the output converter is configured to receive high frequency AC voltage from the isolating transformer ...

POWER CONVERTER

A power converter includes: input terminals for inputting a DC voltage; output terminals for outputting an AC voltage; a switch; a first resonant capacitance connected between both ends of the switch; a first LC resonance circuit connected in series with the switch between the output terminals; and a second LC resonance circuit connected between the input terminals and the switch. The first LC resonance circuit includes an inductance and a capacitance in series. When the input terminals are shorted, frequency characteristics of an impedance of the second LC resonance circuit include first to fourth resonant frequencies. The first resonant frequency is higher than a switching frequency of the switch. The second and fourth resonant frequencies are around double and four times the switching frequency. The impedance has local maxima at the first and third resonant frequencies and local minima at the second and fourth resonant frequencies. 1. A power converter comprising:two direct current (DC) input terminals that are plus and minus and into which a DC voltage is inputted;two alternating current (AC) output terminals that output an AC voltage;a switch with two ends;a first resonant capacitance connected between both ends of the switch;a first LC resonance circuit that is connected in series together with the switch between the AC output terminals; anda second LC resonance circuit that is connected between the two DC input terminals and both ends of the switch,wherein the first LC resonance circuit includes a current path including a series circuit composed of an inductance and a capacitance, andwhen looking from both ends of the switch when the two DC input terminals are shorted, frequency characteristics of an impedance of the second LC resonance circuit include, in order from a low-frequency side to a high-frequency side, a first resonant frequency, a second resonant frequency, a third resonant frequency, and a fourth resonant frequency, the first resonant frequency ...

Systems and Methods for Isolated Low Voltage Energy Storage for Data Centers

Systems and methods of this disclosure use low voltage energy storage devices to supply power at a medium voltage from an uninterruptible power supply (UPS) to a data center load. The UPS includes a low voltage energy storage device (ultracapacitor/battery), a high frequency (HF) bidirectional DC-DC converter, and a multi-level (ML) inverter. The HF DC-DC converter uses a plurality of HF planar transformers, multiple H-bridge circuits, and gate drivers for driving IGBT devices to generate a medium DC voltage from the ultracapacitor/battery energy storage. The gate drivers are controlled by a zero voltage switching (ZVS) controller, which introduces a phase shift between the voltage on the primary and secondary sides of the transformers. When the primary side leads the secondary side, the ultracapacitor/battery discharges and causes the UPS to supply power to the data center, and when the secondary side leads the primary side, power flows from the grid back to the UPS, thereby recharging the ultracapacitor/battery. 1a plurality of DC-DC converter circuits coupled together, each DC-DC converter circuit comprising;a low voltage energy storage device;a first H-bridge circuit coupled to the low voltage energy storage device;a high frequency transformer, a primary side of the high frequency transformer being coupled to the first H-bridge circuit; anda second H-bridge circuit coupled to a secondary side of the high frequency transformer.. A power source comprising; This disclosure generally relates to the application of low-voltage battery energy storage to data centers using multi-level medium voltage uninterrupted power supplies (MVUPSs) and data center static synchronous compensators (DCSTATCOMs), and more particularly, to a bi-directional, high frequency direct current (DC)-DC converter with isolation at the output of energy storage devices.Data centers are among the largest and fastest growing consumers of electricity in the world. In 2013, U.S.-based data centers ...

Method of Operating an Inverter and Inverter

A method operates an inverter by driving respective switching means of the bridge arms using pulse width modulation with a temporally changeable duty cycle such that voltages between the bridge connections have a temporally predefined profile. The respective switching means of the bridge arms are driven with flat-top modulation for particular angular ranges of a respective fundamental oscillation. A respective duty cycle for the respective switching means of the bridge arms is selected such that, during a respective period of the pulse width modulation, at least two shunt resistors always perform their measurement function for a minimum time. 15.-. (canceled)6. A method for operating an inverter , wherein the inverter comprises:a number of bridge arms having respective bridge connections,wherein a respective bridge arm is electrically connected to a first intermediate circuit pole of the inverter on a first side and wherein a respective bridge arm is electrically connected to a second intermediate circuit pole of the inverter on a second side,wherein a respective bridge arm has at least two switching means, wherein a respective bridge connection is electrically connected, depending on a switching state of the switching means of the bridge arm, either to the first intermediate circuit pole or to the second intermediate circuit pole, andwherein a shunt resistor is arranged in a respective bridge arm, which shunt resistor performs or does not perform a measurement function depending on a switching state of the switching means,wherein the method comprises the steps of:driving the respective switching means of the bridge arms using pulse width modulation with a temporally changeable duty cycle such that voltages between the bridge connections have a temporally predefined profile,wherein the respective switching means of the bridge arms are driven with flat-top modulation for particular angular ranges of a respective fundamental oscillation, andwherein a respective duty ...

Inverter circuit control circuit for precluding simultaneous conduction of thyristors

A circuit suitable for use in an induction range. The circuit includes a resonant inverter having first and second gate controlled thyristor switches, the main conduction paths of which are serially connected between the power supply terminals. Trigger pulses for the switches are derived from the current supplied to the inverter load coil. The pulses are timed to prevent the first switch from being closed before the second switch has opened so that both switches can never be conductive at the same time. It also includes circuitry for stopping inverter operation in the event of an overcurrent condition and circuitry for adjusting the inverter output power.

Intermediate voltage link inverter

Motor slip controller for AC induction motor

An energy-saving controller for a multiphase AC induction motor controls the average voltage supplied to the motor windings by the use of a pair of anti-parallel connected SCR's of opposite polarity connected to each winding. The conduction of the SCR's is varied in response to a slip signal derived from the voltage across each pair of SCR's, the line voltage, and the current flow through each phase of the motor winding. <IMAGE>

Inverter control system for driving inductive load

Ozonizer power supply system

用于电力变换器的脉宽调制控制系统

一种用于电力变换器的脉宽调制控制系统，用来驱动组成电力变换器的半导体元件的脉宽调制脉冲是通过把来自指令值产生装置的指令信号与具有恒定周期的连续三角波的载波信号进行比较来计算的。该系统包含：分开计算来自指令值产生装置的所述指令信号的指令值和脉宽调制脉冲的时间积并计算两时间积之间的差值的装置。由对来自所述指令值产生装置的指令信号的差值计算脉宽调制脉冲。

Ac motor controlling device using pulse width modulation inverter

Power conversion system

FIELD: electricity.SUBSTANCE: power conversion system (10) comprises a plurality of modules (14), each of which contains an input (16) and an output (17) and is connected in series. Each module (14) is connected to a DC power source (12), which supplies power to the module (14). In each of the modules (14) is provided with a voltage regulation circuit for changing the voltage between the input (16) and the output (17) from the maximum voltage of the module to the minimum voltage of the module. The control block (29), coupled with voltage regulation circuit of each module (14), changes the voltage between the input (16) and the output (17) of each module (14) so that the full voltage on the series-connected modules (14) represents a signal of alternating current or a signal of rectified alternating current.EFFECT: improving conversion efficiency and providing greater flexibility.40 cl, dwg 4 РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 670 417 C1 (51) МПК H02M 1/088 (2006.01) H02M 7/42 (2006.01) H02M 7/25 (2006.01) H02M 7/497 (2007.01) H02M 7/527 (2006.01) H02M 7/66 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02M 1/088 (2006.01); H02M 7/42 (2006.01); H02M 7/25 (2006.01); H02M 7/497 (2006.01); H02M 7/527 (2006.01); H02M 7/66 (2006.01) (21)(22) Заявка: 2014109399, 10.08.2012 10.08.2012 (73) Патентообладатель(и): ДЭВИС Кевин Стефен (AU) Дата регистрации: 23.10.2018 Приоритет(ы): (30) Конвенционный приоритет: 2009145271 А, 20.06.2011. ЕА 14849 В1, 28.02.2011. US 7485987 B2, 23.08.2007. US 7851943 B2, 20.11.2008. US 20110084553 A1,14.04.2011. EP 2071694 A1, 17.06.2009. WO 2011029566 A1, 17.03.2011. 12.08.2011 AU 2011903228 (45) Опубликовано: 23.10.2018 Бюл. № 30 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.03.2014 (86) Заявка PCT: 2 6 7 0 4 1 7 (56) Список документов, цитированных в отчете о поиске: RU 2191459 C1, 20.10.2002. RU R U (24) Дата начала отсчета срока действия патента: (72) Автор ...

Method and apparatus for controlling voltage type convertor by p.w.m.

없음. none.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

Sequential burst mode activation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

Dc/ac cold cathode fluorescent lamp inverter

A DC/AC cold cathode fluorescent lamp (CCFL) inverter circuit includes a transformer with a primary winding and a secondary winding for providing increased voltage to a CCFL, a first and second MOSFET switches for selectively allowing direct current of a first polarity and a second polarity to flow through the transformer respectively. The primary and secondary windings of the transformer are electrically coupled to ground. A capacitor divider is electrically coupled to the CCFL for providing a first voltage signal representing a voltage across the CCFL. A first feedback signal line receives the first voltage signal. A timer circuit is coupled to the first feedback signal line for providing a time-out sequence of a predetermined duration when the first voltage signal exceeds a predetermined threshold. A protection circuit shuts down the first switch and the second switch when the first voltage signal exceeds the predetermined threshold after the predetermined duration.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

High-efficiency adaptive DC/AC converter

A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.

DC/AC cold cathode fluorescent lamp inverter

A DC/AC cold cathode fluorescent lamp (CCFL) inverter circuit includes a transformer with a primary winding and a secondary winding for providing increased voltage to a CCFL, a first and second MOSFET switches for selectively allowing direct current of a first polarity and a second polarity to flow through the transformer respectively. The primary and secondary windings of the transformer are electrically coupled to ground. A capacitor divider is electrically coupled to the CCFL for providing a first voltage signal representing a voltage across the CCFL. A first feedback signal line receives the first voltage signal. A timer circuit is coupled to the first feedback signal line for providing a time-out sequence of a predetermined duration when the first voltage signal exceeds a predetermined threshold. A protection circuit shuts down the first switch and the second switch when the first voltage signal exceeds the predetermined threshold after the predetermined duration.

Sequential burnst mode activation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

Sequential burst mode activation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

Sequential burst mode activation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

Sequential burst mode activation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

Sequential burst mode actlvation circuit

A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.

Sequential burst mode activation circuit

본 발명은 전원을 다수의 부하로 전달하는 순차 버스트 모드 조절 시스템에 관한 것이다. 본 발명의 일실시예에 따른 시스템(10)은 하나의 펄스 폭 변조된 신호로 부터 다수의 위상 펄스 폭 변조된 신호(36)를 생성하며, 여기서 각각의 위상 신호는 각각의 부하로 전달되는 전원을 조절한다. 일실시예에 따른 회로는 PWM 신호 생성기와, PWM 신호(12)를 수신하고 각각의 부하로 전달되는 전원을 조절하는 데 사용되는 다수의 위상 PWM 신호를 생성하는 위상 지연 어레이를 포함하여 이루어진다. 또한, 본 발명은 고정된 또는 가변의 주파수 기준 신호를 이용하여 PWM 신호의 주파수를 설정하는 주파수 선택기 회로(14)를 더 포함할 수 있다. The present invention relates to a sequential burst mode regulation system for delivering power to multiple loads. System 10 according to one embodiment of the present invention generates a plurality of phase pulse width modulated signals 36 from one pulse width modulated signal, where each phase signal is delivered to a respective load. Adjust The circuit according to one embodiment comprises a PWM signal generator and a phase delay array that generates a plurality of phase PWM signals used to receive the PWM signal 12 and regulate the power delivered to each load. In addition, the present invention may further comprise a frequency selector circuit 14 for setting the frequency of the PWM signal using a fixed or variable frequency reference signal.

Power supply circuit for ozone generator

Pwm inverter device

high voltage generator

고압전원장치가 개시된다. 본 고압전원장치는, 외부로부터 교류전원이 인가시, 이를 정류하여 제1직류전원과 제2직류전원을 생성하는 전원부, 제1직류전원이 인가시, 기설정된 듀티비를 갖는 펄스신호와 제1논리 레벨을 갖는 제어신호를 생성하는 제어부, 펄스신호에 의해 제2직류전원을 승압하는 고압생성부, 제어신호가 제1논리 레벨일때 구동되며, 제어신호가 제2논리 레벨일때, 제2직류전원이 고압생성부로 인가되는 것을 차단하는 전원제어부를 갖는다. 이러한 고압전원장치에 의하면, 레이저 프린터, 팩스, DC-DC컨버터와 같이 고압의 직류전원을 필요로 하는 전자기기에서 사용시, 전자기기의 전원을 오프할때 서지전압이 생성되지 않으며, 스탠바이(stand-by)시 고압전원장치의 내부에 직류전원이 인가되지 않으므로, 스탠바이시의 전력소모를 감소시킬 수 있다. A high voltage power supply is disclosed. The high voltage power supply device includes a power supply unit configured to rectify and generate a first DC power supply and a second DC power supply when an AC power is applied from the outside, and a pulse signal and a first pulse signal having a preset duty ratio when the first DC power is applied. A control unit for generating a control signal having a logic level, a high voltage generation unit for boosting the second DC power supply by a pulse signal, and is driven when the control signal is at the first logic level, and the second DC power supply when the control signal is at the second logic level. It has a power supply control part which cuts off the application to this high pressure generation | generation part. According to such a high voltage power supply device, when used in an electronic device requiring a high voltage DC power supply such as a laser printer, a fax machine, or a DC-DC converter, a surge voltage is not generated when the power of the electronic device is turned off. In this case, since DC power is not applied to the inside of the high-voltage power supply device, power consumption in standby can be reduced.

Self-excited serial inverter

Изобретение относитс  к преобразовательной технике и м.б. использовано при электроэрозионной обработ- ке металлов в качестве промежуточного высокочастотного звена, формирующего пакеты высокочастотных импульсов . Целью  вл етс  повышение надежности . Устр-во содержит разделительные диоды 1-4 и конденсаторы 5, 6 фильтра. В диагональ переменного тока моста тиристоров 7-10 включен коммутирующий конденсатор 15. В устройстве невозможен разр д конденсаторов 5, 6 на одно из одновременно включившихс  противофазных плеч. Тиристоры плеча оказываютс  нагруженными медленно нарастающим входным током. Пробой тиристоров током разр да конденсаторов 5, 6 невозможен. 2 ил. с S 1 СП The invention relates to a converter technique and m. used in electroerosive treatment of metals as an intermediate high-frequency link, forming high-frequency pulse packets. The goal is to increase reliability. The device contains separation diodes 1-4 and filter capacitors 5, 6. A switching capacitor 15 is switched on in the AC diagonal of the thyristor bridge 7-10. The device cannot discharge the capacitors 5, 6 into one of the simultaneously switched antiphase arms. The shoulder thyristors are loaded with a slowly increasing input current. Breakdown of thyristors with a discharge current of capacitors 5, 6 is impossible. 2 Il. with S 1 SP

Transformerless multilevel converter of medium voltage and method for control of transformerless multilevel converter of medium voltage

FIELD: electrical engineering. SUBSTANCE: invention relates to electrical engineering and can be used in medium voltage alternating current drives, flexible transmission systems and high-voltage DC transmission systems. Multilevel converter includes single-phase configurations. Single-phase configuration has the first half-bridge (HB) module, the second HB module, separated by the first capacitor connected to the DC-line, and the module with fixed neutral (NPC) connected to the first HB module and the second HB module. Besides, single-phase configuration has first separate switching device and second separate switching device, wherein the first separate switching device is operatively connected to the first HB module and the NPC module and the second separate switching device is operatively connected to the second HB module and the NPC module. Converter further includes a power output unit comprising several phases and providing multi-phase variable (AC) power, wherein single-phase configuration supplies power to one of several phases of power output unit. EFFECT: easier control of a multilevel converter. 20 cl, 11 dwg, 4 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК H02M 7/483 H02M 7/527 H02P 27/08 H02P 27/14 (11) (13) 2 693 573 C1 (2007.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02M 7/483 (2019.02); H02M 7/527 (2019.02); H02P 27/08 (2019.02); H02P 27/14 (2019.02) (21)(22) Заявка: 2018121281, 13.11.2015 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): СИМЕНС АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) Дата регистрации: 03.07.2019 R U 13.11.2015 (72) Автор(ы): МИХАЛАКЕ, Ливиу (US) (56) Список документов, цитированных в отчете о поиске: RU 2014108141 А, 10.09.2015. RU 2529017 C2, 27.09.2014. CN 104883072 A, 02.09.2015. US 20050139259 A1, 30.06.2005. US 2013249322 A1, 26.09.2013. EP 2724456 A1, 30.04.2014. WO 2012024984 A1, 01.03.2012. (45) Опубликовано: 03.07.2019 Бюл. № 19 ( ...

Single-phase voltage inverter

FIELD: electrical engineering. SUBSTANCE: invention relates to electrical engineering, particularly to single-phase voltage inverters. Single-phase voltage inverter comprises control system, a transistor half-bridge, additional two transistors, two diodes, two throttles and two capacitors, which enables to realise a change of frequency, phase and level of current value of output voltage both below and above level determined by voltage of primary source of DC voltage. EFFECT: technical result is improved weight and dimensions and characteristics of energy converter with stabilisation of output voltage. 2 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 581 033 C1 (51) МПК H02M 7/5395 (2006.01) H02M 7/523 (2006.01) H02M 7/5383 (2007.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014146166/07, 17.11.2014 (24) Дата начала отсчета срока действия патента: 17.11.2014 (72) Автор(ы): Гельвер Федор Андреевич (RU) Приоритет(ы): (22) Дата подачи заявки: 17.11.2014 (45) Опубликовано: 10.04.2016 Бюл. № 10 2 5 8 1 0 3 3 (56) Список документов, цитированных в отчете о поиске: SU 1156225 A, 15.05.1985. RU 2024176 С1, 30.11.1994. RU 2291550 С1, 10.01.2007. US 4564895, 14.01.1986. WO 8906064 A1, 29.06.1989. US 4862342, 29.08.1989. 2 5 8 1 0 3 3 R U Стр.: 1 действующего значения выходного напряжения как ниже, так и выше уровня, определяемого напряжением первичного источника постоянного напряжения. Технический результат состоит в улучшении массогабаритных и энергетических характеристик преобразователя со стабилизацией выходного напряжения. 1 з.п. ф-лы, 2 ил. C 1 C 1 Адрес для переписки: 196158, Санкт-Петербург, Московское ш., 44, ФГУП "Крыловский государственный научный центр" (54) ОДНОФАЗНЫЙ ИНВЕРТОР НАПРЯЖЕНИЯ (57) Реферат: Изобретение относится к электротехнике, в частности к однофазным инверторам напряжения. Однофазный инвертор напряжения содержит систему управления, транзисторный полумост, дополнительные два ...

Power conversion device

FIELD: electricity. SUBSTANCE: power conversion device converts three-phase AC power into DC power via the two-arm PWM-modulation control, and comprises the main circuit (1), which consists of a plurality of switching elements connected therein by the bridge circuit; the voltage command generating unit (2) which generates a voltage command value for the main circuit (1); the current detection unit (3), which detects at least one of the output currents of the main circuit (1); the power factor calculating unit (4), which calculates a power factor based on the output current and the voltage command value; the carrier signal forming unit (5), which generates a carrier signal with the frequency corresponding to the power factor; and the PWM-signal forming unit (6), which compares the voltage command value and the carrier signal for forming a PWM signal which controls the switching of the switching elements. EFFECT: implementation of power conversion by means of the two-arm PWM-modulation control with high versatility, which can weaken the restrictions on the power factor and can effectively use its capabilities regardless of the power factor. 19 cl, 12 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 615 492 C1 (51) МПК H02M 7/48 (2007.01) H02M 7/527 (2006.01) G05F 1/70 (2006.01) H02P 27/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2016132289, 09.01.2014 (24) Дата начала отсчета срока действия патента: 09.01.2014 (72) Автор(ы): ТАИРА, Сатоси (JP) (73) Патентообладатель(и): МИЦУБИСИ ЭЛЕКТРИК КОРПОРЕЙШН (JP) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: RU 2446536 C1, 27.03.2012. RU Приоритет(ы): (22) Дата подачи заявки: 09.01.2014 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.08.2016 (86) Заявка PCT: JP 2014/050250 (09.01.2014) (87) Публикация заявки PCT: Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО ...

Power conversion device

2암 PWM 변조 제어에 의해 전력 변환을 행하는 전력 변환 장치에 있어서, 역률에 대한 제한을 완화할 수 있고, 역률에 의존하지 않고 능력을 유효하게 활용하는 것이 가능한 범용성이 높은 전력 변환 장치를 얻는다. 2암 PWM 변조 제어에 의해 삼상의 교류 전력을 직류 전력으로 변환하는 전력 변환 장치로서, 복수의 스위칭 소자가 브릿지 접속되어 구성되는 주회로(1)와, 주회로(1)의 전압 지령치를 생성하는 전압 지령 생성부(2)와, 주회로(1)의 출력 전류 중 적어도 1개를 검출하는 전류 검출부(3)와, 출력 전류 및 전압 지령치에 기초하여 역률을 연산하는 역률 연산부(4)와, 역률에 따른 주파수의 캐리어 신호를 생성하는 캐리어 신호 생성부(5)와, 전압 지령치와 캐리어 신호를 비교하여, 스위칭 소자를 스위칭 제어하는 PWM 신호를 생성하는 PWM 신호 생성부(6)를 구비한다. In the power conversion apparatus performing the power conversion by the two-arm PWM modulation control, a limitation on the power factor can be relaxed, and a power conversion apparatus with high versatility can be obtained which can effectively utilize the power without depending on the power factor. Phase alternating-current power to direct-current power by two-arm PWM modulation control. The power converting apparatus includes a main circuit 1 in which a plurality of switching elements are bridge-connected and a main circuit 1 which generates a voltage command value of main circuit 1 A voltage command generation section 2, a current detection section 3 that detects at least one of the output currents of the main circuit 1, a power factor calculation section 4 that calculates a power factor based on the output current and voltage command value, A carrier signal generator 5 for generating a carrier signal having a frequency according to the power factor and a PWM signal generator 6 for comparing the voltage command value and the carrier signal to generate a PWM signal for switching control of the switching element.

Pwm power converter

내용 없음. No content.

Resonant converter with switching frequency automatic phase tuning width-pulse adjustment method

FIELD: electrical equipment. SUBSTANCE: invention relates to the field of electrical equipment and can be used in one level direct current into the different level direct current conversion devices, in particular in power supply sources. Method of pulse-width adjustment of the output voltage of a resonant converter is that a predetermined voltage level is maintained on the load of the resonant converter, for which purpose the voltage value is measured on the load of the resonant converter and a constant voltage signal proportional to the load value is formed. Setting the setpoint voltage proportional to the supported voltage level on the load, and generating the difference signal (DS) using the proportional-integral-differentiating controller. AC signal proportional to the loop current is formed, it is converted into an AC voltage signal (ACVS) and the instant of the AC voltage signal transition through zero is monitored. Depending on the DS size, setting the PWM controller generation frequency, clocked by the voltage controlled oscillator (VCO), using which generating the certain width pulses. Pulses are supplied to the inverter key elements control electrodes, at that, providing the pulse width phase self-tuning, setting the filling factor so, at which the signal front VCO formation instant coincides in time with the instant of transition through the ACVS zero. EFFECT: technical result consists in the pulse width phase auto-tuning by the loop current feedback introduction to provide the zero phase offset between the circulating in the loop current and control signals. 1 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 661 495 C1 (51) МПК H02M 7/523 (2006.01) H02M 7/527 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02M 7/523 (2006.01); H02M 7/527 (2006.01) (21)(22) Заявка: 2017128140, 08.08.2017 (24) Дата начала отсчета срока действия патента: Дата регистрации: 17.07.2018 (45) Опубликовано: 17.07.2018 ...

Self-excited inverter

Изобретение относитс  к преобразовательной технике и м,б. использовано в качестве источника питани  установок индукционного нагрева, уль-. тразвука и др. Целью  вл етс  повьше- ние надежности за счет стабилизации напр жени  на элементах в расширенном диапазоне возможных изменений параметров нагрузки. Устр-во содержит мест на . тиристорах 14 с коммутиру- кнцим конденсатором 5 и коммутирующим дросселем 6. Нагрузка 9 включена последовательно с разделительным конденсатором 7 и защитным дросселем 8. . Индуктивный элемент (ИЭ) 10 выполнен с убывающей генри-амперной характеристикой в диапазоне токов, превьша- ющих номинальный ток. Такое вьтолне- ние ИЭ 10 разгружает инвертор, снижает добротность работающих контуров при изменении параметров нагрузки и предотвращает раскачку напр жени  на элементах. 2 ил. С S (Л The invention relates to a converter technique and m, b. used as a power source for induction heating installations, ul. trasonic sound, etc. The goal is to increase reliability by stabilizing the voltage on the elements in an extended range of possible variations in load parameters. The device contains seats on. thyristors 14 with switching capacitor 5 and switching choke 6. Load 9 is connected in series with coupling capacitor 7 and protective choke 8.. The inductive element (IE) 10 is made with a decreasing Henry-ampere characteristic in the range of currents that exceed the rated current. Such an implementation of the IE 10 unloads the inverter, reduces the quality of the working circuits when the load parameters change, and prevents the buildup of the voltage on the elements. 2 Il. With S (L

Pulse voltage generating circuit for electrostatic precipitator employing micro-pulse concept method

PURPOSE: A pulse voltage generating circuit for an electrostatic precipitator employing MPC(Micro-Pulse Concept) method is provided to control the pulse period of peak value by using an inverter of low frequency. CONSTITUTION: An inverter(1) receives DC(Direct Current) voltage and generates a high pressure pulse. A thyristor diode module(2) is connected in serial to the inverter(1) and interrupts high voltages of both ends by means of the on/off operation. A resonance capacitor(3) is connected in serial to the thyristor diode module(2) and raises an LC resonance. A variable DC voltage generating unit(5) applies the DC voltage to a resonance inductor(4) and a precipitator(6). A peak value of pulse voltage and a size of pulse width applied to the precipitator(6) control the output voltage of the inverter(1). The values of the resonance capacitor(3) and the resonance inductor(4) are varied.

Method of controlling thyristor d.c.voltage-to-d.c.voltage converter

In order to energize a load with an output current generally conforming to a control voltage, trains of firing pulses are alternately applied during respective conduction intervals of a recurrence period to a pair of main thyristors connected to opposite terminals of a balanced power supply which may be a DC source. The main thyristors are quenched, at the ends of their respective conduction intervals, by ancillary thyristors which lie in series with a resonant circuit including a commutating capacitor and alternately receive firing pulses in continuous succession in order to keep that capacitor operatively connected at all times to one or the other terminal of the power supply. The transmission of firing pulses to the several thyristors is timed by a logic circuit under the control of a comparator to which the control voltage is fed together with a sawtooth voltage establishing the aforementioned recurrence period.

Sensing Device for output current of inverter

인버터의 출력전류 검출 장치가 개시된다. 본 발명의 인버터의 출력전류 검출 장치는 직류링크의 캐패시터 출력단에 연결된 션트 저항; 상기 션트 저항에 연결되어 출력전류를 검출하는 검출부; 및 상기 검출부의 전류 샘플링 시점을 조절하는 제어부;를 포함한다. An apparatus for detecting an output current of an inverter is disclosed. An output current detecting apparatus of an inverter of the present invention includes: a shunt resistor connected to a capacitor output terminal of a DC link; A detector connected to the shunt resistor and detecting an output current; And a controller for adjusting a current sampling time of the detector.

Method and circuit arrangement for the regulation of a two-dimensional load vector by a digital actuator with limited commutation frequency

The invention relates to a method and a circuit arrangement (32) for controlling a two-dimensional vector (us) of a path (10, 12), by means of a discrete-value actuating element (8) having a limited switching frequency (fs). According to the invention, a control variable desired value (ip*) is initially selected which is produced from the desired values (us*, is*) of this two-dimensional vector (Us) of the control path (10, 12), these control variable actual values (ipn, ipn+1, ipn+2) are alternated during one switching period (Tges) in a prescribed sequence and with prescribed dwell durations (Tm, Tm+1, Tm+2) such that the time mean value of the first vector (us) is equal to its desired value (us*) over one revolution of a formed desired trajectory (TR*), and the next vector (ipn+1, ipn+2, ipn) of the selected control variable vector triple is then driven precisely when the separation between the vector (us) and the next corner point (uso) of the location curve (TR*) is minimal. Thus, with a given, limited switching frequency (fs) a minimum deviation from the desired value is obtained, the time mean value corresponding to the desired value, and a control-response time which is as short as possible is obtained at the same time. <IMAGE>

Frequency multiplier current inverter

FIELD: electrical engineering. SUBSTANCE: invention is a current inverter with frequency multiplication, relates to the field of electrical engineering and metallurgy, namely to power supplies based on semiconductor frequency converters for induction heating and melting of metals. The current inverter consists of a single-phase valve bridge, the DC clamps of which are connected through a filter choke to a DC voltage source, and the AC clamps are connected to the heater inductor through an L-shaped capacitive voltage divider, consisting of a parallel capacitor and connected to one of its plates of a series capacitor. The new is that the current inverter is equipped with additional series capacitors connected in series with the inductor and connected to the second plate of the parallel capacitor, and the outputs of the inductor are connected through the contacts of the power contactor with the opposite plates of the parallel capacitor and power two-pole contactors, which, when switched on, switch the initially connected in series with the inductor, the capacitors are parallel to the input capacitor, and in the off position of the contactors, all the capacitors of the oscillatory circuit are connected in series and the voltage from the inverter is applied to the input capacitor of the circuit. EFFECT: proposed current inverter allows switching the operating mode from one operating frequency to the operating frequency multiplication mode and vice versa while maintaining the matching of the parameters of the inverter and the load, which ensures the optimization of the operating modes of the induction heater at different stages of heating and melting metals. 1 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 768 380 C1 (51) МПК H05B 6/06 (2006.01) H02M 7/521 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H05B 6/06 (2022.02); H02M 7/521 (2022.02) (21)(22) Заявка: 2021124320, 17.08.2021 (24) Дата начала отсчета ...

Autonomous voltage inverter control method

FIELD: electrical engineering. SUBSTANCE: invention can be used to control autonomous voltage inverters (AVI), it may be used in electrical installations for controlling single-phase and three-phase bridge autonomous voltage inverters. Method for controlling the autonomous voltage inverter is based on integrating the difference signal between the reference signal for the phase voltage of the autonomous voltage inverter and the corresponding pulse feedback signal of the phase voltage of the autonomous voltage inverter, comparing the integrated difference signal with two threshold levels, resulting in the formation of a forward and an inverse pulse train key management of half-bridge of the autonomous voltage inverter; a third harmonic signal with an amplitude equal to 1/4.5 of the amplitude of the sinusoidal reference signal for the phase voltage of the autonomous voltage inverter is preliminarily inputted into the sinusoidal reference signal for the phase voltage of the autonomous voltage inverter. EFFECT: technical result consists in expanding the linear range of the amplitude control of the first harmonic of the phase voltage of the autonomous voltage inverter. 1 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 654 295 C1 (51) МПК H02M 7/497 (2007.01) H02M 7/521 (2006.01) H02M 7/527 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02M 7/497 (2006.01); H02M 7/521 (2006.01); H02M 7/527 (2006.01) (21)(22) Заявка: 2016145982, 23.11.2016 (24) Дата начала отсчета срока действия патента: 18.05.2018 Приоритет(ы): (22) Дата подачи заявки: 23.11.2016 (45) Опубликовано: 18.05.2018 Бюл. № 14 2 6 5 4 2 9 5 R U (56) Список документов, цитированных в отчете о поиске: RU 2558722 C1, 10.08.2015. RU 2389128 С1, 10.05.2010. RU 2556874 С1, 20.07.2015. SU 902201 A1, 30.01.1982. GB 2377095 A, 31.12.2002. DE 112005000586 T5, 01.02.2007. US 4700288 A1, 13.10.1987. US 20130051103 A1, 28.02.2013. WO 9001826 A1, 22.02.1990. (54) ...