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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 7785. Отображено 100.
26-01-2012 дата публикации

Compact, low noise power supply for advanced electronics applications, and x-ray analyzer applications thereof

Номер: US20120020463A1
Автор: Daniel Dunham, Ernest Cooley, Igor Ponomarev, Paul Quantock, Robert C. Tatar, Sony Cheriyan
Принадлежит: X Ray Optical Systems Inc

A shielded, low-noise, high-voltage power supply having a plurality of voltage multipliers, each having a toroidal transformer, and collectively producing a high DC output voltage from an AC voltage. A main conductor carries the AC voltage, and is positioned proximate each toroidal transformer of the plurality of voltage multipliers. A conductive shell is conductively connected to the main conductor, and substantially encloses the plurality of voltage multipliers and the main conductor, the conductive shell providing a return path for the AC voltage in the main conductor and providing EMI shielding of the voltage multipliers and the main conductor. Other features are provided, including an intermediate transformer for conditioning/isolating the AC voltages.

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Номер записи: 1
02-02-2012 дата публикации

Adaptive current limiter and dimmer system including the same

Номер: US20120026761A1
Автор: James Roy Young
Принадлежит: Individual

In an embodiment, an adaptive current limiter includes a sense element, a current pass element, and a controller. The sense element includes a first sense terminal coupled to a power supply terminal and a second sense terminal. The sense element generates a sense voltage in response to a feedback current. The current pass element includes a first terminal for receiving the feedback current, a second terminal coupled to the second sense terminal, and a control terminal. The controller is coupled to the sense element and to the control terminal for adjusting the feedback current conducted by the current pass element based on the sense voltage and a time-varying voltage signal.

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Номер записи: 2
14-06-2012 дата публикации

A D.C. Charged Particle Accelerator, A Method of Accelerating Charged Particles Using D.C. Voltages and a High Voltage Power Supply Apparatus for use Therewith

Номер: US20120146554A1
Автор: Geoffrey Ryding, Ronald Horner, Theodore H. Smick, William H. Park
Принадлежит: Twin Creeks Technologies Inc

A d. c. charged particle accelerator comprises accelerator electrodes separated by insulating spacers defining acceleration gaps between adjacent pairs of electrodes. Individually regulated gap voltages are applied across each adjacent pair of accelerator electrodes. In embodiments, the individually regulated gap voltages are generated by electrically isolated alternators mounted on a common rotor shaft driven by an electric motor. Alternating power outputs from the alternators provide inputs to individual regulated d. c. power supplies to generate the gap voltages. The power supplies are electrically isolated and have outputs connected in series across successive pairs of accelerator electrodes. The described embodiment enables an ion beam to be accelerated to high energies and high beam currents, with good accelerator stability.

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Номер записи: 3
18-10-2012 дата публикации

Power supply with integrated linear high voltage multiplier and capacitors therefor

Номер: US20120262959A1
Автор: Gary Hanington
Принадлежит: Individual

A high voltage power supply for use in small diameter spaces such as in oil well logging devices includes an AC voltage source which provides an AC voltage to a voltage multiplier circuit that converts the AC voltage to a high DC voltage. A parallel or combination parallel-series multiplication circuit is used, rather than a series multiplication circuit, to reduce the reverse voltage across each semiconductor rectifier in the multiplication circuit. A plurality of parallel capacitors is constructed using an elongate common capacitor electrode with individual capacitors formed from individual capacitor electrodes spaced along and separated from the common electrode by a layer of dielectric material. The layer of dielectric material can be tapered along the common electrode, and additional dielectric material can be positioned between edges of adjacent individual electrodes. A high voltage end individual electrode can be made wider to increase its capacitance.

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Номер записи: 4
15-11-2012 дата публикации

Reverse recovery current prevention device and motor driving apparatus

Номер: US20120286708A1
Автор: Motonobu Ikeda, Satoshi Yagi, Sumio Kagimura
Принадлежит: Daikin Industries Ltd

A reverse recovery current prevention device includes a full wave rectifier having a plurality of diodes, first and second diodes, a switch part and a switch control unit. The full wave rectifier rectifies a power source voltage from an alternating current power source inputted into first and second input terminals. The first and second diodes have anode terminals connected to the first and second input terminals, respectively. The switch part opens or shorts an electrical circuit between a negative-side output terminal of the full wave rectifier and each cathode terminal of the first and second diodes. The switch control unit prohibits the switch part from shorting the electrical circuit between the negative-side output terminal and each of the cathode terminals when a voltage between the negative-side output terminal and each of the cathode terminals is at or above a threshold.

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Номер записи: 5
17-01-2013 дата публикации

Ac/dc converter device

Номер: US20130016538A1
Автор: Takayuki Fujita
Принадлежит: Daikin Industries Ltd

A command value is a current command value with a triangular-like waveform having a cycle that is ⅓ of a cycle of a three-phase voltage. A carrier has a triangular-like waveform having a cycle shorter than the cycle of the command value. Comparison result signals are pulse signals indicating a result of the comparison between the carrier and the command value. In a region of a phase of 30 to 90 degrees, a portion of the comparison result signal present in this region is employed as a gate signal. In a region of a phase of 270 to 330 degrees, a portion of the comparison result signal present in this region is employed as the gate signal.

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Номер записи: 6
09-05-2013 дата публикации

High-voltage power source

Номер: US20130114970A1
Автор: Taro Minobe
Принадлежит: Canon Inc

A high-voltage power source includes a switching unit configured to be driven according to a frequency signal, a voltage resonance unit configured to generate a voltage according to driving of the switching unit, a rectification unit configured to rectify and amplify the voltage generated by the voltage resonance unit, a separation unit configured to separate an alternating current generated by the voltage resonance unit and a direct current generated by the rectification unit from each other, and a current detection unit configured to detect the current generated by the voltage resonance unit.

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Номер записи: 7
23-05-2013 дата публикации

SWITCH CONTROLLER, SWITCH CONTROL METHOD, AND POWER SUPPLY DEVICE COMPRISING THE SWITCH CONTROLLER

Номер: US20130128640A1
Автор: CHO Gye-Hyun, JANG Ji-Hoon, Lee Jae-Yong, LEE Young-Je
Принадлежит: FAIRCHILD KOREA SEMICONDUCTOR LTD.

The present invention relates to a switch controller, a switch control method, and a power supply including the switch controller. An exemplary embodiment of the present invention detects an on-time of a power switch of the power supply and decreases a frequency of a clock signal according to a period during which the detected on-time is shorter than or equal to the minimum on-time. According to the exemplary embodiment, switching of the power switch is controlled according to a clock signal, and the minimum on-time is an on period of the power switch that cannot be shortened. 1. A switch controller controlling switching operation of a power switch , comprisinga control means detecting an on-time of the power switch and decreasing a frequency of a clock signal according to a period during which the detected on-time is shorter than or equal to the minimum on-time, anda switching control unit controlling switching of the power switch according to the clock signal,wherein the minimum on-time is an on period of the turn-on power switch and cannot be shortened.2. The switch controller of claim 1 , wherein the control means comprises:an on-time detector detecting the on-time using a switching control signal for switching control, generated from the switching control unit;a frequency controller controlling frequency decrease of a clock signal according to a period during which the detected on-time is shorter than the minimum on-time; andan oscillator generating the clock signal according to control of the frequency controller.3. The switch controller of claim 2 , wherein the on-time detector generates a ramp voltage corresponding to the on-time using the switching control signal and generates a detection signal according to a result of comparison between a threshold voltage corresponding to the minimum on-time and the ramp voltage.4. The switch controller of claim 3 , wherein the on-time detector comprises:a switching transistor performing switching according to the ...

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Номер записи: 8
13-06-2013 дата публикации

Power Conversion Device

Номер: US20130148392A1
Автор: INOUE Shigenori, Katoh Shuji
Принадлежит: Hitachi, Ltd.

A power conversion device includes at least two legs connected in parallel each of which includes at least two unit converters connected in series, wherein at least one of the legs is formed using at least two kinds of unit converters including a first type unit converter capable of outputting a unipolar voltage and a second type unit converter capable of outputting a bipolar voltage. 1. A power conversion device comprising: wherein a first location of the leg is set to an AC side connection location, and a second location of the leg is set to a DC side connection location, and', 'wherein at least one of the legs is formed using at least two kinds of unit converters including a first type unit converter capable of outputting a unipolar voltage and a second type unit converter capable of outputting a bipolar voltage., 'at least two legs connected in parallel, each of which includes at least two unit converters connected in series,'}2. A power conversion device comprising:at least two legs connected in parallel, each of which includes a first reactor, a first arm having at least two unit converters connected in series, a second arm having at least two unit converters connected in series, and a second reactor, which are connected in series,wherein a connection point between the first and second arms is set to an AC terminal, and a parallel connection point between at least two legs connected in series is set to a DC terminal, andwherein the first and second arms are formed using at least two kinds of unit converters including a first type unit converter capable of outputting a unipolar voltage and a second type unit converter capable of outputting a bipolar voltage.3. The power conversion device according to claim 1 , wherein a sum of the maximum output voltages of the second type unit converters is equal to or larger than an output voltage of the first type unit converter.4. The power conversion device according to claim 1 , wherein the AC terminal is linked to an AC ...

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Номер записи: 9
04-07-2013 дата публикации

Systems And Methods For Providing AC/DC Boost Converters For Energy Harvesting

Номер: US20130170264A1
Автор: Divan Deepakraj M., Lambert Franklin C., Moghe Rohit
Принадлежит: GEORGIA TECH RESEARCH CORPORATION

The present invention describes systems and methods for harvesting energy from an alternating magnetic field. An exemplary embodiment can include a flux concentrator having an open core coil wherein a first current with a first voltage is induced in the flux concentrator when placed proximate an alternating magnetic field. Additionally, the system can include a transformer, having a first and second winding, connected to the flux concentrator and inducing a second current in the second winding, wherein the second current has a second voltage higher than the first voltage and a threshold voltage of a first and second diode. Furthermore, the system can include a converter, connected to the secondary winding for charging the leakage inductance of the secondary winding by creating a short circuit between the secondary winding and the converter; and the diodes connected to the secondary winding and the converter for discharging the leakage inductance. 1. A system for harvesting energy from an alternating magnetic field comprising:a flux concentrator having an open core coil wherein a first current with a first voltage can be induced in the flux concentrator when placed proximate an alternating magnetic field;a transformer, having a first winding and a second winding, connected to the flux concentrator and enabled to induce a second current in the second winding, wherein the second current has a second voltage higher than the first voltage and higher than a threshold voltage of a first diode and a second diode;a converter configured to selectively connect a short circuit between the secondary winding and the converter to charge the leakage inductance of the secondary winding; andthe first diode and the second diode connected to the secondary winding and the converter for discharging the leakage inductance.2. The system of claim 1 , wherein the flux concentrator further comprises:a ferromagnetic core having a midsection and at least two ends, wherein a cross-sectional area ...

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Номер записи: 10
08-08-2013 дата публикации

POWER SUPPLY APPARATUS OF HOME APPLIANCE

Номер: US20130200829A1
Автор: LIM Tae Hoon, WON Jong Hun
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A power supply apparatus of a home appliance which meets standby power regulation of 0.5 watts using one SMPS. As compared with a general circuit which meets the standby power regulation using two or more SMPSs, it may be possible to curtail expenses required for addition of a separate standby only SMPS and miniaturize a PCB, resulting in a reduction in cost. Further, in a washing machine employing a motor, a circuit is provided to bypass a back EMF generated in the motor even if AC power is not supplied to the washing machine due to occurrence of a power failure or unplugging of the washing machine. Therefore, it may be possible to prevent a PCBA from being damaged due to the back EMF. 1. A power supply apparatus of a home appliance , comprising:a power line to supply alternating current (AC) power from an AC power source;first and second rectifiers, each of the first and second rectifiers rectifying the supplied AC power;a main relay connected to an input of the first rectifier to switch the AC power to the first rectifier;a switching mode power supply (SMPS) connected to an output of the second rectifier to generate a direct current (DC) voltage for driving the home appliance based on a rectified voltage from the second rectifier; anda load switch connected to an output of the SMPS to switch the DC voltage from the SMPS.2. The power supply apparatus according to claim 1 , further comprising a filter connected to the power line to remove a noise component of the AC power supplied through the power line.3. The power supply apparatus according to claim 1 , further comprising an inverter connected to an output of the first rectifier to convert a rectified voltage from the first rectifier into a 3-phase AC voltage and supply the converted 3-phase AC voltage to a motor claim 1 ,wherein the first rectifier is connected between the AC power source and the inverter to rectify and smooth the AC power supplied through the power line to output a motor driving voltage.4. The ...

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Номер записи: 11
08-08-2013 дата публикации

AC-DC CONVERTER WITH ADAPTIVE CURRENT SUPPLY MINIMISING POWER CONSUMPTION

Номер: US20130201735A1
Автор: Bourne Paul, Murfett David, Tracy Philip
Принадлежит: HENDON SEMICONDUCTORS PTY LTD

A circuit arrangement with standby mode minimising power and/or current consumption having a mains AC power supply terminals and an active circuit capable of converting said mains AC power to lower voltage DC levels for operating in an active mode or in a standby mode as required by an appliance such that the selection of the current sensing resistor value for said current sensing resistor limits the maximum peak current through the FET so that the current sensing resistor arrangement is capable of providing significant increases in a steeper rise time of the current at around mains AC power supply zero crossing, so that current is pulled high while the mains AC power supply voltage is low. 1. A circuit arrangement with standby mode minimising power and/or current consumption having a mains AC power supply terminals and an active circuit capable of converting said mains AC power to lower voltage DC levels for operating in an active mode or in a standby mode as required by an appliance , said circuit including;one or more rectifying diodes to provide a rectified AC output from the mains AC supply;a main voltage detection arrangement in communication with said rectified AC signal and in series with an AC mains supply rated resistor, wherein said resistor supplies output to a first bandgap circuitry that with a selected defined voltage level provides a regulatable current path;said regulated current path including a gate to a field effect transistor (FET) controlled electronic switch with the drain of the FET connected to the rectified AC signal and the source of the FET connected to a load circuit, said load circuit having at least a capacitor and a load;said mains voltage detection arrangement also including a second bandgap circuit providing a low DC voltage detector to detect when a selectable voltage has been achieved across a load so that once the selectable voltage has been achieved this communicates with the first band gap circuit to lower the mains detection ...

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Номер записи: 12
15-08-2013 дата публикации

Switching Element, Power Converter, Direct Current Transmission System, Current Control Device, Method of Controlling Power Converter, and Method of Controlling Current in Voltage Source Converter

Номер: US20130208519A1
Автор: Bando Akira, EGUCHI Yoshio, Ichinose Masaya, INOUE Shigenori, ITO Tomomichi, Katoh Shuji, SAKUCHI Osamu, YAMAMOTO Takayoshi, YAMASHITA Keiichi, YOSHIHARA Toru
Принадлежит: Hitachi, Ltd.

A switching element of a power converter generates a low voltage, using a current flowing in the power converter, and supplies a power to drive itself. A switching element of a power converter for conversion from direct current into alternate current or from alternate current into direct current includes: a terminal and a terminal which are used in building the switching element itself in the power converter; a capacitor, a high-side controllable switch and a low-side controllable switch enabling outputting the voltage of the capacitor, the voltage being output between the terminal and the terminal, and a self-supply power source for supplying a power to drive the bi-directional chopper switching element itself, using a current flowing in the capacitor. 1. A switching element , comprising:a first terminal and a second terminal which are used in configuring a serial switching element group by being built in a power converter for electrically converting a grid current, the grid current being an alternate current, into a direct current or electrically converting a direct current into an alternate current;an energy accumulation unit;a plurality of controllable switches that enable outputting accumulated energy source accumulated by the energy accumulation unit, the accumulated energy source being output between the first terminal and the second terminal; andan internal power source for supplying power to the switching element itself, using a current flowing in a portion of the power converter.2. The switching element according to claim 1 , wherein the internal power source supplies the power to the switching element itself using the accumulated energy source.3. The switching element according to claim 1 ,wherein the energy accumulation unit is a capacitor,wherein the plurality of controllable switches enables outputting a voltage of the capacitor between the first terminal and the second terminal, andwherein the internal power source supplies the power to the switching ...

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Номер записи: 13
29-08-2013 дата публикации

POWER SUPPLY, IMAGE FORMING DEVICE, AND POWER SUPPLY METHOD

Номер: US20130223867A1
Автор: ASO Yutaka, KAWANABE Motohiro, MIYADERA Tatsuya, Miyazaki Susumu, NAKAMURA Akinobu, Tsuchiya Fuminori, Yoshikawa Keita
Принадлежит:

Disclosed is a power supply including a first voltage generating unit that generates a first voltage from an external power supply; a second voltage generating unit that generates a first predetermined voltage and supplies the generated first predetermined voltage to the load; a third voltage generating unit that generates the first predetermined voltage and supplies the generated first predetermined voltage to the load; and a controller that causes the first voltage to be greater than or equal to a second voltage during a first mode, and causes the first voltage to be less than the second voltage during a second mode. During the first mode, the power is supplied from the second voltage generating unit and the third voltage generating unit to the load, and during the second mode, the power is supplied from the third voltage generating unit to the load. 1. A power supply configured to supply power to a load during a first mode and a second mode , the power supply comprising:a first voltage generating unit configured to generate a first voltage from an external power supply;a second voltage generating unit configured to generate a first predetermined voltage and configured to supply the generated first predetermined voltage to the load, wherein the second voltage generating unit is coupled to the first voltage generating unit, and the second voltage generating unit is configured to operate when the first voltage is greater than or equal to a second voltage;a third voltage generating unit configured to generate the first predetermined voltage from the first voltage and configured to supply the generated first predetermined voltage to the load, the third voltage generating unit being coupled to the first voltage generating unit; anda controller configured to cause the first voltage generated by the first voltage generating unit to be greater than or equal to the second voltage during the first mode, and configured to cause the first voltage generated by the first ...

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Номер записи: 14
19-09-2013 дата публикации

Monolithic high voltage multiplier

Номер: US20130242627A1
Автор: Bahman Hekmatshoartabari, Davood Shahrjerdi, Devendra K. Sadana, Ghavam G. Shahidi, Stephen W. Bedell
Принадлежит: International Business Machines Corp

High voltage diode-connected gallium nitride high electron mobility transistor structures or Schottky diodes are employed in a network including high-k dielectric capacitors in a solid state, monolithic voltage multiplier. A superjunction formed by vertical p/n junctions in gallium nitride facilitates operation of the high electron mobility transistor structures and Schottky diodes. A design structure for designing, testing or manufacturing an integrated circuit is tangibly embodied in a machine-readable medium and includes elements of a solid state voltage multiplier.

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Номер записи: 15
03-10-2013 дата публикации

Switching Power Source Device and Illuminating Apparatus

Номер: US20130257304A1
Автор: Hirokazu Otake, Noriyuki Kitamura, Toshio Tsuji, Yuji Takahashi
Принадлежит: Toshiba Lighting and Technology Corp

A switching power source device includes: a direct power source; and a chopper circuit including a pair of input terminals connected to the direct power source and a pair of output terminals connected to a load, the chopper circuit including a first inductor, a second inductor magnetically coupled to the first inductor, a third inductor connected to the first inductor, a switching element causing an augmented current to flow from the direct power source to the first and third inductors while turned on, a constant current element connected to the switching element in series, a rectifier element causing a reduced current to flow through the first and third inductors while the switching element is turned off, and a drive circuit controlling and turning off a gate voltage of the switching element after the switching element is turned on and the augmented current reaches a constant current element saturated state.

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Номер записи: 16
17-10-2013 дата публикации

ELECTRIC DEVICE AND A METHOD FOR A WAVE POWER PLANT

Номер: US20130270831A1
Автор: Bostrom Cecilia, Eriksson Mikael, Leijon Mats
Принадлежит: SEABASED AB

The invention relates to an electric device with a winding () and means for inducing a current in the winding. A bridge circuit () electrically connects the winding () to a load (). According to the invention the bridge circuit () includes capacitor means (), which is adapted for obtaining resonance with the impedance of the winding () 1. An electric device including a winding , means for inducing a current in the winding and an electrical bridge circuit , wherein the electrical bridge circuit includes capacitor means having a capacitance adapted for obtaining resonance with the impedance of the winding.2100500. The electric device according to claim 1 , wherein the bridge circuit (-) further includes semiconductor means having one or more semiconductors.3. The electric device according to claim 2 , wherein the semiconductor means includes one or more diodes.4. The electric device according to claim 2 , wherein the semiconductor means includes one or more thyristors.5. The electric device according to claim 2 , wherein the semiconductor means includes one or more insulated gate bipolar transistors (IGBTs).6200206207208132062011320720820220320420512207202203208204205. The electric device according to claim 1 , wherein the bridge circuit () includes a first () claim 1 , a second () and a third () branch connected to an electric load () claim 1 , the first branch () having a capacitor () in parallel to an electric load () claim 1 , the second () and third () branch each having two semiconductors ( claim 1 , ; claim 1 ,) claim 1 , and the winding () being connected to the second branch () between the two semiconductors ( claim 1 , ) and to the third branch () between the two semiconductors ( claim 1 , ) claim 1 , respectively.740040740813407401403408402404124074014034084024044014041340540340213406. The electric device according to claim 1 , wherein the bridge circuit () includes a first () and a second () branch connected to an electric load () claim 1 , the first ...

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Номер записи: 17
31-10-2013 дата публикации

Controller for an inverter circuit, inverter, and method for operating an inverter

Номер: US20130286695A1
Автор: Christian Bachmann, Dominik Bergmann, Georg Bachmaier, Guillaume Pais, Matthias Gerlich, Mirjam Mantel
Принадлежит: SIEMENS AG

Damage to an inverter due to an excessively high start-up current, when using space vector control without a voltage sensor in conjunction with small connection inductances, can be prevented with a method for controlling the inverter, and with a corresponding controller, wherein the controller is configured to transmit in a start-up phase of an inverter circuit a control signal to a control input of the inverter circuit, wherein the control signal simultaneously switches three first semiconductor switches, which are connected to a first DC voltage terminal of the inverter circuit, temporarily into a conducting state.

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Номер записи: 18
21-11-2013 дата публикации

INPUT RELAY ARCHITECTURE FOR RECTIFYING POWER CONVERTERS AND SUITABLE FOR AC OR DC SOURCE POWER

Номер: US20130308356A1
Автор: Lin Gary, Reddy Raghothama, Subramanium Palanivel
Принадлежит: GENERAL ELECTRIC COMPANY

Power converter circuitry for converting power from a power source of any one of a number of power source types, and in which arcing at relays in the event of a shutdown is avoided. A shunt circuit is provided in inrush and protection circuitry of the power converter, the circuit including a power field-effect transistor and optionally a series-connected relay. The shunt circuit is controlled to divert current from the main relay in the event of a rectifier fault, allowing the main relay to be opened under reduced or zero current. The field-effect transistor of the shunt circuit can then be safely opened, allowing its series relay to be opened under zero current conditions. 1. A power converter , comprising:a rectifier;a protection circuit comprising a first relay, the first relay having a contact path coupled between an input of the power converter via a first node and the rectifier;a shunt circuit connected to the first node, and comprising a transistor with a conduction path coupled to the first node; andshunt control circuitry having an output connected to a control terminal of the transistor, the shunt control circuitry set up to turn on the transistor responsive to a fault condition at the rectifier.2. The power converter of claim 1 , wherein the shunt circuit further comprises:an auxiliary relay having a contact path connected in series with the conduction path of the transistor, and controlled by the shunt control circuitry.3. The power converter of claim 1 , wherein the power converter has first and second input terminals adapted to receive power from a power source claim 1 , the first input terminal coupled to the first node;wherein the shunt circuit is connected between the first node and a second node coupled to the second input terminal of the power converter;wherein the rectifier has first and second rectifier input nodes coupled to the first and second input terminals, the first rectifier input node coupled to the first input terminal via the ...

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Номер записи: 19
28-11-2013 дата публикации

CONVERSION SYSTEM FOR MULTI DIRECT CURRENT VOLTAGE

Номер: US20130314955A1
Автор: GAO ZHI-YONG, LIU YU-LIN, WU TING-TING
Принадлежит:

A conversion system includes a transformer, a rectifier element, a filter circuit, a voltage regulator circuit, and a divider circuit. The voltage regulator circuit includes a first option switch, a first regulator, and a second regulator. The transformer outputs an AC voltage, and the rectifier element converts the AC voltage to a pulsating DC voltage. The filter circuit converts the pulsating DC voltage to a ripple DC voltage. The divider circuit outputs a first DC voltage of a constant positive value when the first option switch connects to the first regulator, and the divider circuit connects to the first regulator to control value of the first DC voltage value. The divider circuit outputs a second DC voltage of a constant negative value when the first option switch connects the second regulator, and the divider circuit is connected to the second regulator to control value of the second DC voltage. 1. A conversion system comprising:a transformer;a rectifier element;a filter circuit;a voltage regulator circuit comprising a first option switch, a first regulator, and a second regulator; anda divider circuit comprising a divider resistance module and a second option switch, the divider resistance module comprising a plurality of divider resistances;wherein the transformer outputs an AC voltage to the rectifier element, the rectifier element converts the AC voltage to a pulsating DC voltage and outputs the pulsating DC voltage to the filter circuit, and the filter circuit converts the pulsating DC voltage to a ripple DC voltage and outputs the ripple DC voltage to the first option switch; the divider circuit outputs a first DC voltage of a constant positive value when the first option switch is connected to the first regulator, the second option switch is connected to the plurality of divider resistances to control value of the first DC voltage; the divider circuit outputs a second DC voltage of a constant negative value when the first option switch is connected to ...

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Номер записи: 20
19-12-2013 дата публикации

POWER CONVERSION APPARATUS AND METHOD OF CONTROLLING THE SAME

Номер: US20130335041A1
Автор: BAEK Jei-hoon, HAN Kyu-bum, KIM Hyun-Bae, KIM Jong-soo
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A power conversion apparatus including a current source converter configured to convert Alternate Current (AC) power to Direct Current (DC) power; a power controller configured to set a d-axis current command and a q-axis current command, which correspond to the AC power to the current source converter, by reflecting a difference between a measurement DC link voltage measured at an output terminal of the current source converter and a DC link voltage set by a DC link voltage command; and a phase angle controller configured to adjust a phase angle of the current source converter and transmit the adjusted phase angle to the current source converter, in response to the d-axis current command and the q-axis current command. 1. A power conversion apparatus comprising:a current source converter configured to convert Alternate Current (AC) power to Direct Current (DC) power;a power controller configured to set a d-axis current command and a q-axis current command, which correspond to the AC power to the current source converter, by reflecting a difference between a measurement DC link voltage measured at an output terminal of the current source converter and a reference DC link voltage set by a DC link voltage command; anda phase angle controller configured to adjust a phase angle of the current source converter and transmit the adjusted phase angle to the current source converter, in response to the d-axis current command and the q-axis current command.2. The power conversion apparatus of claim 1 , wherein the current source converter is a thyristor converter.3. The power conversion apparatus of claim 1 , wherein the power controller comprises:a vector rotator configured to convert a phase voltage of the AC power to a DC d-axis voltage vector and a DC q-axis voltage vector;a proportional-integral controller configured to generate a power command by integrating the difference between the measurement DC link voltage and the reference DC link voltage;a differentiator ...

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Номер записи: 21
26-12-2013 дата публикации

Power converting device, motor driving device, and refrigerating and air-conditioning apparatus

Номер: US20130342139A1
Автор: Koichi Arisawa, Takashi Yamakawa, Takuya Shimomugi, Yosuke Shinomoto
Принадлежит: Mitsubishi Electric Corp

A power converting device includes a rectifying circuit that rectifies voltage of an alternating-current power supply; smoothing means that smoothes output voltage from the rectifying circuit; short-circuiting means that is disposed more closely to the alternating-current power supply than the smoothing means and that short-circuits the alternating-current power supply and controls at least one of electric current and voltage; a reactor that is disposed more closely to the alternating-current power supply than the short-circuiting means; one or more backflow preventing elements that prevent electric current from flowing backward from a load side toward the alternating-current power supply; commutating means for performing a commutation operation for causing electric current to flow toward a different path that is connected in parallel with the one or more backflow preventing elements; malfunction detecting means for detecting a malfunction of the commutating means; and switching control means that performs operation control of the commutating means in accordance with detection by the malfunction detecting means.

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Номер записи: 22
02-01-2014 дата публикации

Rectifierarrangement having schottky diodes

Номер: US20140001927A2
Автор: Alfred Goerlach
Принадлежит: ROBERT BOSCH GMBH

A rectifier system having press-in diodes that contain a Schottky diode as semiconductor element. The Schottky diodes are operated in an operating range in which the diode losses increase as the temperature increases.

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Номер записи: 23
09-01-2014 дата публикации

Inductor current detection circuit and led driver

Номер: US20140009080A1
Автор: Xiaoru Xu
Принадлежит: Hangzhou Silergy Semiconductor Technology LTD

The present invention pertains to an inductor current detection circuit in a switching mode power supply, and a light-emitting diode (LED) driver thereof. In one embodiment, an inductor current detection circuit configured in a switching mode power supply under discontinuous conduction mode, can include: (i) a voltage detection circuit configured to generate a sampling voltage based on a drain-source voltage of a power switch in the switching mode power supply; (ii) a voltage holding circuit configured to receive the sampling voltage, and to generate a holding voltage through a sampling and holding operation; and (iii) a comparison circuit configured to compare the sampling voltage against the holding voltage, and to generate a zero-crossing signal when the sampling voltage is less than the holding voltage, where the zero-crossing signal is configured to represent an inductor current ending time of the switching mode power supply.

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Номер записи: 24
09-01-2014 дата публикации

Power conversion circuits

Номер: US20140009986A1
Автор: James Nanut, Pia Nanut
Принадлежит: James Nanut, Pia Nanut

According to one embodiment, an AC power system includes a first AC/DC converter to be coupled to a direct current (DC) load and a multi-phase AC power supply. The system further includes a second AC/DC converter coupled in parallel with the first AC/DC converter via an interphase transformer to the DC load and the multi-phase AC power supply. The system further includes a controller coupled to the first and second AC/DC converters, where the controller is configured to generate a gate trigger signal for firing each of the rectifiers for the first and second AC/DC converters. During a first power cycle, a rectifier of the first AC/DC converter is fired at a firing angle advanced to a firing angle of a corresponding rectifier of the second DC/DC converter. During a second power cycle, the rectifier of the first AC/DC converter is fired at a firing angle lagging to a firing angle of the corresponding rectifier of the second AC/DC converter.

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Номер записи: 25
20-02-2014 дата публикации

Power device

Номер: US20140049176A1
Автор: Brian Santee, Michael H. Freeman, Mitchael C. Freeman, Robert Dieter, W. J. "Jim" Weaver, JR.
Принадлежит: Individual

An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.

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Номер записи: 26
06-03-2014 дата публикации

Power conversion apparatus

Номер: US20140063877A1
Автор: Satoshi Taira
Принадлежит: Mitsubishi Electric Corp

A power conversion apparatus according to the present invention includes a plurality of PWM converters ( 2 and 3 ) that are connected in parallel and convert power supplied from a common three-phase AC power supply ( 1 ) into DC power and, and supply the DC power to a common load ( 6 ) and a plurality of short-circuit prevention reactors ( 10 and 11 ) that are connected to an output side of a part or all of the PWM converters ( 2 and 3 ) and, when a deviation occurs in operation timings of switching elements of a same phase in the respective PWM converters, reduce a short-circuit current flowing between PWM converters with mismatched operation timings.

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Номер записи: 27
06-03-2014 дата публикации

High voltage driving device for x-ray tube

Номер: US20140064455A1
Автор: Jong Lae Park, Ki Bong Sung
Принадлежит: Poskom Co Ltd

The present invention relate to an X-ray photographing apparatus, and more particularly, to a high voltage driving circuit for X-ray tube, in which a first voltage multiplying rectifier unit and a second voltage multiplying rectifier unit are in series connected to each other based on a high voltage generation unit to stably convert a high voltage power generated from the high voltage generation unit into a drive power for an X-ray tube with high energy efficiency, and in which a plurality of isolation transformers or high voltage transformers is in series connected to each other in the high voltage generation unit to divide a voltage of the second voltage multiplying rectifier unit into a withstanding voltage of the isolation transformers or the high voltage transformers, thereby ensuring excellent insulation properties.

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Номер записи: 28
07-01-2021 дата публикации

MVDC LINK-POWERED BATTERY CHARGERS AND OPERATION THEREOF

Номер: US20210006085A1
Автор: Berggren Bertil, Dijkhuizen Frans, Majumder Ritwik, Saers Robert
Принадлежит:

One embodiment is a system comprising a medium voltage direct current (MVDC) link electrically coupling a first AC-DC converter and a second AC-DC converter. The first AC-DC converter is electrically coupled with a first alternating current (AC) feeder. The second AC-DC converter electrically coupled with a second AC feeder. A battery charger electrically coupled with the MVDC link via a converterless connection. A first electronic controller is operatively coupled with the first AC-DC converter. A second electronic controller is operatively coupled with the second AC-DC converter. During operation of the battery charger to charge a battery the first electronic controller is configured to control power flow between the first AC feeder and the second AC feeder and the second electronic controller is configured to control the voltage of the MVDC link. 1. A system comprising:a medium voltage direct current (MVDC) link electrically coupling a first AC-DC converter and a second AC-DC converter, the first AC-DC converter coupled with first distribution voltage alternating current (DVAC) power system circuitry, the second AC-DC converter coupled with second DVAC power system circuitry;a battery charger providing a converterless electrical connection between the MVDC link and a battery connector;a first electronic controller operatively coupled with the first AC-DC converter; anda second electronic controller operatively coupled with the second AC-DC converter;wherein during operation of the battery charger to charge a battery electrically coupled with the battery charger the first electronic controller is configured to control active power flow between the first DVAC power system circuitry and the second DVAC power system circuitry and the second electronic controller is configured to control voltage of the MVDC link to charge the battery.2. The system of wherein the first electronic controller and the second electronic controller operate concurrently and independently ...

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Номер записи: 29
02-01-2020 дата публикации

POWER CONVERSION SYSTEM AND METHOD FOR PRE-CHARGING DC-BUS CAPACITORS THEREIN

Номер: US20200006970A1
Автор: Chen Xin, HAO Shiqiang, LIU Hongyao, Zhang Weiqiang
Принадлежит:

The present invention discloses a power conversion system and a method for pre-charging DC-Bus capacitors therein. The power conversion system comprises a plurality of power modules, each including a power input end; a charging input end; a power output end; at least one power conversion unit, each of the power conversion unit including at least one DC-Bus capacitor and being electrically connected to the power input end and the power output end; and a pre-charging unit electrically connected to the charging input end for receiving direct current and electrically connected to the DC-Bus capacitor for pre-charging the DC-Bus capacitor. The power input ends of the plurality of power modules are connected in series and then electrically connected to an AC power source, and the power output ends of the plurality of power modules are connected in parallel. 1. A power conversion system , comprising: a power input end;', 'a charging input end;', 'a power output end;', 'at least one power conversion unit, each of the power conversion unit including at least one DC-Bus capacitor and being electrically connected to the power input end and the power output end; and', 'a pre-charging unit electrically connected to the charging input end for receiving direct current and electrically connected to the DC-Bus capacitor for pre-charging the DC-Bus capacitor,', 'wherein, the power input ends of the plurality of power modules are connected in series and then electrically connected to an AC power source, and', 'the power output ends of the plurality of power modules are connected in parallel., 'a plurality of power modules, each including2. The power conversion system according to claim 1 , wherein the pre-charging unit includes a pre-charging isolation unit which includes a plurality of secondary circuits.3. The power conversion system according to claim 2 , wherein each of the power conversion unit includes a plurality of the DC-Bus capacitors connected in series claim 2 , and the ...

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Номер записи: 30
07-01-2021 дата публикации

Load Control Device Having an Overcurrent Protection Circuit

Номер: US20210007197A1
Автор: Moorthy Dinesh Sundara, Steiner James P.
Принадлежит: Lutron Technology Company LLC

A load control device for controlling power delivered from an alternating-current power source to an electrical load may comprise a controllably conductive device, a control circuit, and an overcurrent protection circuit that is configured to be disabled when the controllably conductive device is non-conductive. The control circuit may be configured to control the controllably conductive device to be non-conductive at the beginning of each half-cycle of the AC power source and to render the controllably conductive device conductive at a firing time during each half-cycle (e.g., using a forward phase-control dimming technique). The overcurrent protection circuit may be configured to render the controllably conductive device non-conductive in the event of an overcurrent condition in the controllably conductive device. The overcurrent protection circuit may be disabled when the controllably conductive device is non-conductive and enabled after the firing time when the controllably conductive device is rendered conductive during each half-cycle. 1. A load control device for controlling power delivered from an alternating-current (AC) power source to an electrical load , the load control device comprising:a controllably conductive device adapted to be coupled between the AC power source and the electrical load for conducting a load current through the electrical load to control the power delivered to the electrical load;a control circuit configured to control the controllably conductive device to be non-conductive at the beginning of each half-cycle of the AC power source and to render the controllably conductive device conductive at a firing time during each half-cycle; andan overcurrent protection circuit coupled to the controllably conductive device and configured to render the controllably conductive device non-conductive in the event of an overcurrent condition in the controllably conductive device;wherein the control circuit is configured to generate an enable ...

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Номер записи: 31
12-01-2017 дата публикации

SWITCHING POWER SUPPLY CIRCUIT

Номер: US20170012548A1
Автор: ITOH Hiroshi, OKA Toshiyuki, SAKUNO KEIICHI
Принадлежит: SHARP KABUSHIKI KAISHA

In a switching power supply circuit (A) of the invention, a low-voltage node capacitor () is connected between a primary-side low-voltage stable potential node (LN) and a secondary-side low-voltage stable potential node (LN), and a high-voltage node capacitor () is connected between a primary-side high-voltage stable potential node (HN) and an anode of a rectifier element (). Thereby, it is possible to provide the switching power supply circuit which achieves, with a simple configuration, both of noise reduction and potential stabilization of stable potential nodes. 1. A switching power supply circuit , comprising: a transformer in which a primary side and a secondary side are insulated and separated and power is transmitted to the secondary side; a switching field effect transistor which performs switching of power in the primary side of the transformer; and a rectifier element which rectifies power in the secondary side of the transformer , whereinone end of a primary-side terminal of the transformer is connected to a primary-side high-voltage stable potential node,the other end of the primary-side terminal of the transformer is connected to a drain of the switching field effect transistor,a source of the switching field effect transistor is connected to a primary-side low-voltage stable potential node,one end of a secondary-side terminal of the transformer is connected to an anode of the rectifier element,a cathode of the rectifier element is connected to a secondary-side high-voltage stable potential node,the other end of the secondary-side terminal of the transformer is connected to a secondary-side low-voltage stable potential node,a low-voltage node capacitor is connected between the primary-side low-voltage stable potential node and the secondary-side low-voltage stable potential node, anda high-voltage node capacitor is connected between the primary-side high-voltage stable potential node and the anode of the rectifier element.2. The switching power supply ...

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Номер записи: 32
12-01-2017 дата публикации

FIVE-LEVEL CONVERTING DEVICE

Номер: US20170012552A1
Автор: Gan Hong-Jian, Pu Bo-Yu, Wang Ming
Принадлежит:

A five-level converting device includes a first switch module, a second switch module and a third switch modules each connects to a neutral point, a positive terminal and a negative terminal of a bus capacitor module. A first switch module includes a plurality of bidirectional switching circuits cascaded to each other, and each bidirectional switching circuit includes two first switching units reversely connected in series. Second switch module includes a plurality of second switching units connected in series. Third switch module includes a plurality of third switching units connected in series. A first flying capacitor unit is connected across the first switching module and a second switch module, and a second flying capacitor unit is connected across the first switching module and a third switching module. The first flying capacitor unit and the second flying capacitor unit are connected to different connection points between the first switch units respectively. 1. A five-level converting device , comprising:an alternating current (AC) terminal;a bus capacitor module, having a positive terminal, a negative terminal and a neutral point;a first switch module, having two terminals connected to the neutral point of the bus capacitor module and the AC terminal respectively, wherein the first switch module comprises a plurality of bidirectional switching circuits cascaded to each other, each of the bidirectional switching circuits comprises two first switching units reversely connected in series;a second switch module, having two terminals connected to the positive terminal of the bus capacitor module and the AC terminal respectively, wherein the second switch module comprises a plurality of second switching units connected in series;a third switch module, having two terminals connected to the negative terminal of the bus capacitor module and the AC terminal respectively, wherein the third switch module comprises a plurality of third switching units connected in series ...

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Номер записи: 33
12-01-2017 дата публикации

FIVE-LEVEL CONVERTING DEVICE

Номер: US20170012554A1
Автор: Pu Bo-Yu, Wang Ming
Принадлежит:

A five-level converting device includes an AC terminal, a bus capacitor module having a positive terminal, a negative terminal and a neutral terminal, a first switch module and a second switch module. The first switch module includes a bidirectional switching circuit, and the bidirectional switching circuit includes two first switching units reversely connected in series. The second switch module includes two second switching units, two third switching units, two fourth switching units, and two fifth switching units. The two second switching units are cascaded and connected to the two fourth switching units in parallel. The third, the fourth and the fifth switching units are cascaded and are connected to the bus capacitor module in parallel. Two different connection points of the first switch module are connected to the third switching units and fifth switching units through two flying capacitor modules respectively. 1. A five-level converting device , comprising:an AC terminal;a bus capacitor module, having a positive terminal, a negative terminal and a neutral terminal;a first switch module, having a bidirectional switching circuit, wherein the bidirectional switching circuit comprises two first switching units reversely connected in series, a terminal of one of the two first switching units connects to the neutral terminal of the bus capacitor module;a second switch module, having two second switching units, two third switching units, two fourth switching units and two fifth switching units, wherein the two second switching unit are cascaded to each other, the two third switching units, the two fourth switching units and the two fifth switching units are cascaded and are connected to the bus capacitor module in parallel, wherein the two third switching units are connected to the positive terminal of the bus capacitor module, the two fifth switching units are connected to the negative terminal of the bus capacitor module, the two fourth switching units and the two ...

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Номер записи: 34
14-01-2016 дата публикации

Converter Station With Diode Rectifier

Номер: US20160013732A1
Автор: DORN JOERG, ERGIN DOMINIK, Hammer Thomas, KNAAK HANS-JOACHIM, MENKE PETER, SCHUSTER ROLAND
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A converter station for the transmission of electrical power has a diode rectifier with a DC terminal and an AC terminal. At least one transformer is connected to the AC terminal. In order to render the converter station as compact as possible, the diode rectifier is arranged in an insulating material. 115-. (canceled)16. A converter station for the transmission of electrical power , the converter station comprising:a converter having a DC-voltage connection and an AC-voltage connection;at least one transformer connected to said AC-voltage connection of said converter;at least one common encapsulation housing having at least a part of said converter and at least a part of said transformer disposed therein in common; andinsulating material encasing said part of said transformer and said part of said converter, said common encapsulation housing being filled with said insulating material.17. The converter station according to claim 16 , which further comprises at least one smoothing inductor connected to said DC-voltage connection of said converter.18. The converter station according to claim 17 , wherein at least a part of said smoothing inductor is arranged in said common encapsulation housing.19. The converter station according to claim 16 , wherein said insulating material is a protective gas or an insulating liquid.20. The converter station according to claim 16 , wherein said converter is a thyristor rectifier or a diode rectifier.21. The converter station according to claim 16 , wherein said converter comprises a plurality of partial converters connected in series on a DC voltage side.22. The converter station according to claim 21 , wherein each said partial converter is connected on an AC voltage side to a partial transformer claim 21 , and wherein said partial converter and said partial transformer are arranged in a common partial encapsulation housing.23. The converter station according to claim 22 , which comprises a partial smoothing inductor arranged in ...

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Номер записи: 35
15-01-2015 дата публикации

METHOD FOR PROVIDING LOW VOLTAGE DC POWER FROM AC MAINS POWER

Номер: US20150016158A1
Автор: Paik Namwook
Принадлежит: SCHNEIDER ELECTRIC IT CORPORATION

According to one aspect, embodiments of the invention provide a power supply system comprising an input line configured to receive input AC power, a first capacitor coupled to the input line, a second capacitor, a controller, a rectifier having an input coupled to the first capacitor and an output coupled to the second capacitor, the second capacitor further coupled to the controller, and a switch selectively coupled across the first capacitor, and configured to selectively bypass the first capacitor, wherein the controller is configured to detect a voltage across the second capacitor, operate the switch to charge the second capacitor at a first rate if the voltage is above a predetermined threshold, and operate the switch to charge the second capacitor at a second rate if the voltage is below a predetermined threshold. 2. The power supply system of claim 1 , wherein operate the switch to charge the second capacitor at a first rate includes opening the switch to couple the first capacitor in series with the second capacitor.3. The power supply system of claim 2 , wherein operate the switch to charge the second capacitor at a second rate includes closing the switch to bypass the first resistor.4. The power supply of claim 3 , wherein the first rate is less than the second rate.6. The power supply system of claim 1 , further comprising a resistor having a resistance value of about 7.2 kΩ coupled between the input line and the switch.7. The power supply system of claim 1 , wherein the first capacitor has a value in the range of 1-4.7 nF.8. The power supply system of claim 1 , further comprising an AC coil coupled between the input and the first capacitor.9. The power supply system of claim 8 , wherein the controller is further configured to open the switch upon detection that a voltage across the AC coil is at a predetermined level.10. The power supply system of claim 1 , wherein the controller is further configured to close the switch to provide a path to power a load ...

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Номер записи: 36
15-01-2015 дата публикации

Gated thyristor power device

Номер: US20150016165A1
Автор: David Schie
Принадлежит: Individual

An improved gated thyristor that utilizes less silicon area than IGBT, BIPOLARs or MOSFETs sized for the same application is provided. Embodiments of the inventive thyristor have a lower gate charge, and a lower forward drop for a given current density. Embodiments of the thyristor once triggered have a latch structure that does not have the same Cgd or Ccb capacitor that must be charged from the gate, and therefore the gated thyristor is cheaper to produce, and requires a smaller gate driver, and takes up less space than standard solutions. Embodiments of the inventive thyristor provide a faster turn off speed than the typical >600 ns using a modified MCT structure which results in the improved tail current turn off profile (<250 ns). Additionally, series resistance of the device is reduced without comprising voltage blocking ability is achieved. Finally, a positive only gate drive means is taught as is a method to module the saturation current using the gate terminal.

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Номер записи: 37
09-01-2020 дата публикации

DAMAGE PREDICTING DEVICE AND DAMAGE PREDICTING METHOD FOR POWER SEMICONDUCTOR SWITCHING ELEMENT, AC-DC CONVERTER, AND DC-DC CONVERTER

Номер: US20200014295A1
Автор: Ikeda Hidetoshi, TOGAWA Takashi
Принадлежит:

A damage predicting device of a power semiconductor switching element includes a resistor connected to a gate of the power semiconductor switching element, and control circuitry. The control circuitry compares a detection voltage matching a voltage generated between two ends of the resistor and a reference voltage, and predicts that predetermined damage has been accumulated in a gate insulating layer in the power semiconductor switching element when the detection voltage exceeds the reference voltage. 112-. (canceled)13. A damage predicting device of a power semiconductor switching element , the damage predicting device comprising:a resistor connected to a gate of the power semiconductor switching element; andcontrol circuitry; wherein compares, when a predetermined voltage is applied to the gate of the power semiconductor switching element, a detection voltage matching a voltage generated between two ends of the resistor and a reference voltage; and', 'predicts, when the detection voltage exceeds the reference voltage, that predetermined damage has been accumulated in a gate insulating layer in the power semiconductor switching element., 'the control circuitry14. The damage predicting device according to claim 13 , wherein the control circuitry outputs a signal indicating that predetermined damage has been accumulated in the gate insulating layer in the power semiconductor switching element claim 13 , according to a result of the prediction performed by the control circuitry.15. The damage predicting device according to claim 13 , further comprising potential difference detecting circuitry to which a first potential and a second potential that are generated at the two ends of the resistor claim 13 , one potential at each of the two ends claim 13 , are input claim 13 , the potential difference detecting circuitry outputting the detection voltage according to the first potential and the second potential.16. The damage predicting device according to claim 15 , wherein ...

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Номер записи: 38
09-01-2020 дата публикации

Control circuit and control method for outputting pulse width modulation control signal with zero-crossing detection

Номер: US20200014296A1
Автор: Hongbao Wang, Hongyuan Jin, Kang GUO
Принадлежит: Delta Electronics Shanghai Co Ltd

The present disclosure provides a control circuit, where the control circuit includes: a signal detection unit, a zero-crossing detection (ZCD) signal acquisition unit, a pulse width modulation (PWM) control signal generation unit, and a signal processing unit; where the signal detection unit, the ZCD signal acquisition unit, the PWM control signal generation unit and the signal processing unit are connected in cascade. The control circuit provided in the present disclosure reduces processing delay of a ZCD signal and improve signal a processing accuracy of a power factor correction (PFC) system.

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Номер записи: 39
03-02-2022 дата публикации

Semiconductor device and electronic device

Номер: US20220037475A1
Автор: Hideki Uochi, Kouhei Toyotaka
Принадлежит: Semiconductor Energy Laboratory Co Ltd

A semiconductor device and the like with low power consumption are provided. In a semiconductor device including an electrostatic actuator group, an OS transistor and a capacitor are provided in each electrostatic actuator, and a power supply voltage supplied from the outside is boosted in each electrostatic actuator. The use of the OS transistor can retain the boosted voltage for a long period even after the supply of the power supply voltage is stopped. The use of the OS transistor can miniaturize the capacitor.

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Номер записи: 40
19-01-2017 дата публикации

Control of power converters

Номер: US20170019031A1
Автор: Anthony SAGNERI, Milovan Kovacevic, Ranko SREDOJEVIC, Victor Sinow
Принадлежит: FINsix Corp

Control techniques and circuits for resonant power converters and other power converters are described. Control of power converters based on more than one control parameter can provide improved efficiency over a wide operating range. A resonant power converter may have its switching frequency controlled within a narrow band to improve efficiency.

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Номер записи: 41
17-04-2014 дата публикации

Two-wire dimmer switch for low-power loads

Номер: US20140103827A1
Автор: Chris J. Salvestrini, Matthew V. Harte, Robert C. Newman, Jr.
Принадлежит: Lutron Electronics Co Inc

A two-wire load control device (such as, a dimmer switch) for controlling the amount of power delivered from an AC power source to an electrical load (such as, a high-efficiency lighting load) includes a thyristor coupled between the source and the load, a gate coupling circuit coupled between a first main load terminal and the gate of the thyristor, and a control circuit coupled to a control input of the gate coupling circuit. The control circuit generates a drive voltage for causing the gate coupling circuit to conduct a gate current to thus render the thyristor conductive at a firing time during a half cycle of the AC power source, and to allow the gate coupling circuit to conduct the gate current at any time from the firing time through approximately the remainder of the half cycle, where the gate coupling circuit conducts approximately no net average current to render and maintain the thyristor conductive.

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Номер записи: 42
18-01-2018 дата публикации

X-RAY SOURCE, HIGH-VOLTAGE GENERATOR, ELECTRON BEAM GUN, ROTARY TARGET ASSEMBLY, ROTARY TARGET, AND ROTARY VACUUM SEAL

Номер: US20180019092A1
Автор: HADLAND Roger
Принадлежит:

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode. 1. An electron beam apparatus , comprising:a vacuum enclosure; andan electron beam generator, mounted in the vacuum enclosure,the electron beam generator comprising a high-voltage electrode and an electron emission source mounted at the high-voltage electrode to produce an electron beam, wherein:the electron beam generator further comprises a control module mounted within the electron beam generator;the electron beam apparatus further comprises a remote module mounted relative to a wall ...

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Номер записи: 43
18-01-2018 дата публикации

X-RAY SOURCE, HIGH-VOLTAGE GENERATOR, ELECTRON BEAM GUN, ROTARY TARGET ASSEMBLY, ROTARY TARGET, AND ROTARY VACUUM SEAL

Номер: US20180019093A1
Автор: HADLAND Roger
Принадлежит:

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode. 1. A rotary vacuum seal for a rotating shaft , the seal comprising:a bore for accommodating the shaft and having a terminal aperture at each of high pressure and low pressure ends;a chamber surrounding and circumferentially adjoining the bore at a position intermediate between the high pressure and low pressure ends; anda flow path extending from the chamber to a port suitable for connection to a vacuum pump,{'sup': −5', '−3, 'wherein the bore and shaft are dimensioned such that a ...

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Номер записи: 44
03-02-2022 дата публикации

POWER REGULATING UNIT AND TRANSPORT REFRIGERATION DEVICE USING THE POWER REGULATING UNIT

Номер: US20220038023A1
Автор: Chen Jack Linhui, Wen Yiming
Принадлежит:

The present disclosure relates to a power regulating unit and a transport refrigeration device using the same, and belongs to the technical field of power supplies. The power regulating unit of the present disclosure comprises: a rectifier module configured to perform a rectification operation on an AC input to obtain a first DC signal; a controller configured to control the rectification operation of the rectifier module based on corresponding parameter information for reflecting fluctuations of the AC input to prevent the first DC signal obtained from being affected by the fluctuations; a first output port configured to output the first DC signal; a first DC-DC conversion module configured to convert the first DC signal into a second DC signal; and a second output port configured to output the second DC signal. The power regulating unit of the present disclosure can provide multi-mode DC outputs and the DC outputs are stable. 1. A power regulating unit for converting an AC input to a DC output , comprising:a rectifier module configured to perform a rectification operation on the AC input to obtain a first DC signal;a controller configured to control the rectification operation of the rectifier module based on corresponding parameter information for reflecting fluctuations of the AC input to prevent the first DC signal obtained from being affected by the fluctuations;a first output port configured to output the first DC signal;a first DC-DC conversion module configured to convert the first DC signal into a second DC signal; anda second output port configured to output the second DC signal.2. The power regulating unit according to claim 1 , further comprising:a second DC-DC conversion module configured to convert the first DC signal into a third DC signal; anda third output port configured to output the third DC signal.3. The power regulating unit according to claim 1 , wherein the first DC-DC conversion module is configured as a DC charging output device capable of ...

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Номер записи: 45
17-04-2014 дата публикации

REDUCTION OF ELECTROSTATIC DISCHARGE EFFECTS IN CHARGE-PUMP ELEVATOR LADDER

Номер: US20140104903A1
Автор: Aebischer Daniel
Принадлежит: SEMTECH CORPORATION

The final cell or cells in a cascade or ladder of voltage elevator cells may be exposed to significant overvoltages from electrostatic discharge originating in off-chip loads. In such conditions, the final cell or cells may be damaged or destroyed by such overvoltages. Protective circuitry may be added to one or more of the final voltage elevator cells to reduce or eliminate such damage or destruction by distributing the overvoltage among two or more cells. Such protective circuitry may include a capacitor coupled in parallel with the input and output node of one or more of the final voltage elevator cells. The protective circuitry may also include a resistor coupled in series between the final voltage elevator cell and the load. 1. A voltage multiplier cell comprising ,an input node electrically coupled to a voltage multiplier circuit within the cell and configured to receive an input voltage;an output node electrically coupled to the circuit and configured to output an output voltage;a capacitor electrically coupled to the input node and the output node in parallel with the circuit and configured so as to distribute to the input node a portion of an electrostatic pulse received at the output node.2. The cell of claim 1 , wherein the capacitor has a capacitance between 10 pF and 20 pF.3. The cell of claim 1 , further comprising claim 1 ,a resistor electrically coupled to the output node in series between the output node and an output of the cell configured for connection to a load.4. The cell of claim 3 , wherein the resistance of the resistor is between 5 kOhm and 10 kOhm.5. The cell of claim 1 , wherein the capacitor is formed using metal-metal or MOS fabrication.7. The voltage multiplier of claim 6 , wherein the plurality of voltage multiplier cells comprises at least three voltage multiplier cells.8. The voltage multiplier of claim 6 , further comprising claim 6 ,a resistor electrically coupled to the output node of the last cell in series between the output ...

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Номер записи: 46
22-01-2015 дата публикации

POWER DIMMER

Номер: US20150023078A1
Автор: Gonthier Laurent, Renard Benoit
Принадлежит:

A control circuit varies the power of a load powered by an alternating voltage, comprising: a first thyristor and a first diode connected in antiparallel between first and second nodes, the cathode of the first diode being on the side of the first node; a second thyristor and a second diode connected in antiparallel between the second node and a third node, the cathode of the second diode being on the side of the third node; third and fourth diodes connected in antiseries between the first and third nodes, the cathodes of the third and fourth diodes being connected to a fourth node; a transistor between the second and fourth nodes; and a control unit for controlling the first and second thyristors and the transistor. 1. A circuit for controlling a power variation of a load when powered with an A.C. voltage comprising:a first thyristor and a first diode electrically coupled between first and second nodes, the first diode having a cathode electrically coupled to the first node and an anode electrically coupled to the second node, the first thyristor having an anode electrically coupled to the first node and cathode electrically coupled to the second node;a second thyristor and a second diode electrically coupled between the second node and a third node, the second diode having a cathode electrically coupled to the third node and an anode electrically coupled to the second node, the second thyristor having an anode electrically coupled to the third node and a cathode electrically coupled to the second node;third and fourth diodes electrically coupled between the first and third nodes, the third and fourth diodes having respective cathodes electrically coupled to a fourth node and respective anodes electrically coupled to the first and third nodes, respectively;a transistor electrically coupled between the second and fourth nodes; anda control unit configured to control the first and second thyristors and the transistor.2. The circuit of claim 1 , wherein the control ...

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Номер записи: 47
16-01-2020 дата публикации

SELECTABLE POWER SCAVENGING SYSTEMS AND METHODS

Номер: US20200020480A1
Автор: COQUINCO Bernard
Принадлежит:

Methods and systems are presented for configuring a rectifier across a secondary side of a current transformer; configuring circuitry to harvest energy across one or more loads coupled across an output of the rectifier selectively in response to an indication that a variable line current at a primary side of the current transformer is small enough; configuring circuitry to shunt at least a first load of the one or more loads coupled across the output of the rectifier selectively in response to an indication that a line current at the primary side is large enough; and configuring circuitry to harvest energy across the first load of the one or more loads coupled across the output of the rectifier again selectively in response to an indication that a line current at the primary side is again small enough. 1. A power scavenging system comprising:at least one rectifier across a secondary side of a current transformer;circuitry configured to harvest energy across one or more selectively switchable loads coupled across an output of said rectifier selectively in response to an indication that a variable line current at a primary side of said current transformer is small enough;circuitry configured to shunt at least a first selectively switchable load of said one or more selectively switchable loads coupled across said output of said rectifier selectively in response to an indication that a line current at said primary side is large enough; andcircuitry configured to harvest energy across said first selectively switchable load of said one or more selectively switchable loads coupled across said output of said rectifier again selectively in response to an indication that a line current at said primary side is again small enough.2. The power scavenging system of claim 1 , wherein said indications that said variable line current at said primary side is small enough claim 1 , that said line current at said primary side is large enough claim 1 , and that said line current at said ...

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Номер записи: 48
21-01-2021 дата публикации

POWER CONVERSION APPARATUS AND CONTROL METHOD OF THE SAME

Номер: US20210021205A1
Автор: Horikoshi Shinichi, Sakai Koujirou
Принадлежит:

A power conversion apparatus includes: a converter converting AC voltage supplied from an AC power supply via a switch unit, into DC voltage; a smoothing capacitor smoothing the DC voltage output from the converter; a resistor suppressing electric current flowing into the smoothing capacitor; a switch short-circuiting the both ends of the resistor; a filter including reactors and capacitors and that removes noise; and a control unit controlling opening and closing of the switch unit and the switch. The control unit changes the switch unit from the open state to the closed state with the switch in an open state if the voltage across the smoothing capacitor is lower than a voltage threshold, and changes the switch unit from the open state to the closed state with the switch in an closed state if the voltage across the smoothing capacitor is equal to or greater than the voltage threshold. 1. A power conversion apparatus , comprising:a converter configured to convert alternate-current voltage supplied from an alternate-current power supply via a switch unit, into direct-current voltage;a smoothing capacitor configured to smooth the direct-current voltage output from the converter;a resistor disposed between the converter and the smoothing capacitor, and configured to suppress electric current flowing into the smoothing capacitor;a switch connected in parallel with the resistor and configured to short-circuit both ends of the resistor;a filter including reactors and capacitors, and disposed between the switch unit and the converter, the filter being configured to remove noise; anda control unit configured to control opening and closing of the switch unit and the switch,wherein the control unit is configured to change the switch unit from an open state to a closed state with the switch being in an open state if a voltage across the smoothing capacitor is lower than a voltage threshold, and is configured to change the switch unit from the open state to the closed state ...

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Номер записи: 49
21-01-2021 дата публикации

Control device and power control system

Номер: US20210021210A1
Автор: Kazuyori TAHATA, Masashi SHIGEMITSU, Shota MIDORIKAWA, Shuhei Fujiwara, Yoshiyuki Kono
Принадлежит: Mitsubishi Electric Corp

A control device for controlling a power source connected to an alternating-current (AC) power system includes: a frequency control unit that controls a frequency of the power source operating in a constant-voltage constant-frequency control scheme; a power calculation unit that calculates, when the frequency control unit varies a frequency of the power source, a variation of an effective power output from the power source; an arithmetic unit that calculates a frequency characteristics constant of the AC power system, based on a variation of the frequency of the power source and the variation of the effective power output from the power source; and a selection unit that selects a control scheme for the power source, based on the frequency characteristics constant of the AC power system.

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Номер записи: 50
29-01-2015 дата публикации

Four-terminal circuit element with photonic core

Номер: US20150028674A1
Автор: Stephen Sampayan
Принадлежит: Lawrence Livermore National Security LLC

A four-terminal circuit element is described that includes a photonic core inside of the circuit element that uses a wide bandgap semiconductor material that exhibits photoconductivity and allows current flow through the material in response to the light that is incident on the wide bandgap material. The four-terminal circuit element can be configured based on various hardware structures using a single piece or multiple pieces or layers of a wide bandgap semiconductor material to achieve various designed electrical properties such as high switching voltages by using the photoconductive feature beyond the breakdown voltages of semiconductor devices or circuits operated based on electrical bias or control designs. The photonic core aspect of the four-terminal circuit element provides unique features that enable versatile circuit applications to either replace the semiconductor transistor-based circuit elements or semiconductor diode-based circuit elements.

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Номер записи: 51
25-01-2018 дата публикации

EXCITATION SYSTEM

Номер: US20180026434A1
Автор: KELLER Tobias, Knapp Wolfgang
Принадлежит:

A excitation system and a generator arrangement with the excitation system is proposed. The excitation system comprises a converter adapted for converting an AC current to a DC current, a switching device for short circuiting an AC input of the converter, and an arc detection device for detecting an arc fault in the excitation system and for actuating the switching device upon detecting the arc fault. Therein, the switching device comprises an irreversible switch adapted for short circuiting the AC input such that the arc fault is quenched. This provide a comprehensive protection against arc faults. 1. A excitation system , comprising:a converter adapted for converting an AC current to a DC current;a switching device for short circuiting an AC input of the converter, the AC input comprising multiple phases; andan arc detection device for detecting an arc fault in the excitation system and for actuating the switching device upon detecting the arc fault;wherein the switching device comprises an irreversible switch adapted for short circuiting the AC input such that the arc fault is quenched, the irreversible switch is actuateable by the arc detection device and which is adapted for short circuiting the multiple phases with each other.2. The excitation system according to claim 1 ,wherein the switching device comprises a propellant adapted for actuating the irreversible switch.3. The excitation system according to claim 1 ,wherein the irreversible switch of the switching device is actuateable within an actuation time below 10 ms.4. The excitation system according to claim 1 ,wherein the switching device comprises at least one thyristor adapted for providing a conduction path, when actuated by the arc detection device.5. The excitation system according to claim 1 ,wherein the irreversible switch of the switching device is further adapted for grounding the AC input of the converter, when actuated by the arc detection device.6. The excitation system according to claim 1 , ...

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Номер записи: 52
29-01-2015 дата публикации

ISOLATING MINIMAL SWITCHED POWER SUPPLY

Номер: US20150028758A1
Автор: Diesing Hans-Wolfgang
Принадлежит:

Conventional linear or switched power supplies do not sufficiently meet increased requirements for the lowest possible standby losses in idle current mode or ready mode, or for maintaining the charge in storage capacitors or rechargeable batteries even when said supplies have significantly increased circuit complexity. The proposed schematic diagram provides a solution which, in comparison to prior art, can produce a large-scale reduction in said standby losses using a breakover voltage diode, such as e.g. DIAC, SIDAC, TRISIL, or a glow lamp, which, once the respective breakover voltage or triggering voltage has been reached, repeatedly discharges a high-voltage charging capacitor via the primary winding of a pulse transformer, said capacitor in limiting the alternating current with zero-loss and being continuously re-charged by means of a high-voltage input charging capacitor in the surge and ebb supply voltage phases. The pulse bursts of the pulse transformer are rectified on the secondary side and smoothed by means of a buffer capacitor. As the output voltage is clearly dependent on a variable load impedance, a linear fixed voltage regulator with minimal power losses can be connected downstream to stabilise the voltage, without appreciably affecting the energy balance. Sensors that have been decentrally installed can thus be supplied, or a minimal voltage supply for load monitoring and prompt readiness can thus be provided, even for larger switched power supplies and load parts. 1. An isolating minimal switched power supply according to appended circuit diagram , is hereby characterizedin that a pulse transformer inductively transforms the nearly loss-free discharge pulses of a high-voltage storage capacitor that are limited by a high-voltage input capacitor at the AC power supply during startup (power on) of the supply half-phase via a DIAC four-layer diode onto the secondary circuit with rectifier and buffer capacitor for smoothing the output voltage.2. An ...

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Номер записи: 53
25-01-2018 дата публикации

POWER CONVERSION DEVICE

Номер: US20180026546A1
Автор: Iisaka Atsushi, ISHIGURO Tetsuya
Принадлежит:

A power conversion device includes an input current sensor, an input voltage sensor, a power converter, an output voltage sensor for detecting an output voltage from the power converter, an output current sensor for detecting an output current value from the power converter, and a controller for controlling the power converter. The controller obtains an allowable current value that can be accepted from an external alternating current power source, and, controls the power converter so that the input current value does not exceed the allowable current value based on an input current value detected by the input current sensor. The controller detects an abnormality in the power conversion device based on the input current value, the input voltage, the output current value, the output voltage, and power conversion efficiency of the power converter. 1. A power conversion device for converting alternating current power into direct current power to supply the direct current power to a load , the power conversion device comprising:an input current sensor that detects an input current value of the alternating current power;an input voltage sensor that detects an input voltage value of the alternating current power;a power converter that converts the input alternating current power into the direct current power;an output current sensor that detects an output current value from the power converter;an output voltage sensor that detects an output voltage value from the power converter; anda controller that obtains an allowable current value of the alternating current power that can be accepted, and controls the power converter so that the input current value does not exceed the allowable current value, based on the input current value detected by the input current sensor,wherein the controller detects an abnormality in the power conversion device based on the input current value, the input voltage value, the output current value, the output voltage value, and power conversion ...

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Номер записи: 54
10-02-2022 дата публикации

HYBRID MULTI-LEVEL INVERTER SYSTEM FOR SWITCHED SERIES/PARALLEL SOURCES

Номер: US20220045621A1
Автор: Bassi Hussain Mohammad, Salam Zainal
Принадлежит: KING ABDULAZIZ UNIVERSITY

A single-phase hybrid multilevel inverter capable of producing a higher number of output voltage levels using fewer power switches and DC voltage sources compared to existing multilevel inverters. The levels are synthesized by switching the DC voltage sources in series/parallel combinations. An auxiliary circuit is introduced to double the number of levels by creating an intermediate step in between two levels. In addition, a zero level is introduced to overcome the inherent absence of this level in the original circuit. To improve the total harmonic distortion, a hybrid modulation technique is utilized. A 300 W, a thirteen level multilevel inverter (including the zero level) was designed and constructed. The circuit was tested with a no-load, resistive load and resistive-inductive load. The experimental results closely match simulated and mathematical analyses. 115-. (canceled)16. A hybrid multilevel inverter system for voltage level generation in a switched series/parallel sources (SSPS) , comprising:{'sub': 'dc', 'a level generation module having k voltage generation cells, k+1 DC voltage sources, V, and 3k unidirectional switches;'}{'sub': 'a', 'an auxiliary module in series with the level generation module, the auxiliary module having two unidirectional switches and an auxiliary DC voltage source, V;'}a polarity changing unit in series with the level generation module and the auxiliary module, the polarity changing unit having four unidirectional switches and two load terminals arranged in an H-bridge configuration having a 0.5 μs dead time; anda controller having circuitry operatively connected to the 3k unidirectional switches located in the level generation module, the two unidirectional switches in the auxiliary module and the four unidirectional switches in the polarity changing unit; apply a first set of k square wave modulation pulses having a first frequency and first bandwidth to each unidirectional switch in the level generation module, and generate a ...

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Номер записи: 55
28-01-2021 дата публикации

CONTROL APPARATUS FOR POWER CONVERTER

Номер: US20210028717A1
Автор: HANDA Yuichi, HAYASHI Yuji, IYASU Seiji
Принадлежит: Denso Corporation

In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and an alternating-current voltage obtainer obtains an alternating-current voltage. A drive signal outputting unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command. The drive signal outputting unit performs peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command. A delay unit delays, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage. The drive signal defines the off-switching timing of the switch. 1. A control apparatus applicable to a power converter that includes an inductor and a drive switch , and that converts one of an alternating-current voltage and a direct-current voltage input thereto into the other of the alternating-current voltage and the direct-current voltage , the control apparatus comprising:a current obtainer configured to obtain a current flowing through the inductor as an inductor current;an alternating-current voltage obtainer configured to obtain the alternating-current voltage; generate, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command; and', 'perform peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command; and, 'a drive signal outputting unit configured toa delay unit configured to delay, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage, the drive signal defining the off-switching timing of the switch.2. The control apparatus according to claim 1 , wherein:the power converter is configured to convert the ...

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Номер записи: 56
28-01-2021 дата публикации

Power conversion apparatus and control method of the same

Номер: US20210028720A1
Автор: Koujirou SAKAI
Принадлежит: FANUC Corp

A power conversion apparatus includes: a converter including switching elements and configured to convert an AC voltage supplied from an AC power supply through a switch unit into a DC voltage; a filter provided between the switch unit and the converter and including reactors and capacitors, the filter being configured to remove noise; and a control unit configured to discharge electric charge stored in the capacitors by setting the switching elements into an ON state after opening the switch unit.

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Номер записи: 57
05-02-2015 дата публикации

Power conversion system and method

Номер: US20150035284A1
Автор: Hongwu She, Rajendra Naik, Shivkumar Venkatraman Iyer, Wenqiang Yang
Принадлежит: General Electric Co

An exemplary power conversion system includes a first power conversion module, a second power conversion module, and a controller. The first power conversion module includes a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the second load side converter. The second power conversion module includes a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter. The controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module. The switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage and a second DC link voltage.

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Номер записи: 58
02-02-2017 дата публикации

DC SIDE FAULT ISOLATOR FOR HIGH VOLTAGE DC CONVERTORS

Номер: US20170033708A1
Автор: ABDEL-KHALIK AYMAN, AHMED SHEHAB, ELSEROUGI Ahmed, MASSOUD AHMED
Принадлежит:

The direct current (DC) side fault isolator for high voltage direct current (HVDC) converters () includes a first set of double thyristor switches () connected across the line-to-line voltage terminals between first and second phases of alternating current (AC) terminals of a HVDC converter (), and a second set of double thyristor switches () connected across the line-to-line voltage between the second phase and a third phase of the AC terminals of the HVDC converter (). In use, the first and second sets of double thyristor switches () separate the HVDC converter () from an external power grid () during direct current (DC) side faults by turning on these thyristors (). 1. A direct current side fault isolator for high voltage direct current converters , comprising:a first set of double thyristor switches connected across line-to-line voltage terminals, between first and second phases of alternating current terminals of a high voltage direct current converter; anda second set of double thyristor switches connected across the line-to-line voltage terminals, between the second phase and a third phase of the alternating current terminals of the high voltage direct current converter, whereby said first and second sets of double thyristor switches separate the high voltage direct current converter from an external power grid during direct current side faults.2. The direct current side fault isolator for high voltage direct current converters as recited in claim 1 , wherein the high voltage direct current converter is a two-level voltage-source converter claim 1 , said first and second sets of double thyristor switches each comprising three double thyristor switches.3. The direct current side fault isolator for high voltage direct current converters as recited in claim 2 , wherein each said double thyristor switch comprises a pair of thyristors connected in inverse-parallel.4. The direct current side fault isolator for high voltage direct current converters as recited in ...

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Номер записи: 59
05-02-2015 дата публикации

Lossless Snubber Circuit And Operation Method Thereof

Номер: US20150036253A1
Автор: Meng Wang
Принадлежит: Emerson Network Power Co Ltd

The present invention discloses a lossless snubber circuit and an operation method thereof. The lossless snubber circuit includes a first snubber circuit. The first snubber circuit includes a first diode (D 7 ) and a capacitor (C 3 ). The capacitance of the capacitor (C 3 ) is big enough so that a voltage spike generated at the moment when a switch transistor (Q 1 ) is turned off is depressed by charging the capacitor (C 3 ). When the switch transistor (Q 1 ) is on, the electric charges released by the capacitor (C 3 ) are directed to a first capacitor (C 1 ) in a three-phase Vienna structure, so as to avoid the problem of voltage stress difference caused by the large quantity of electric charges released by the capacitor (C 3 ) flowing back to the switch transistor (Q 1 ).

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Номер записи: 60
01-02-2018 дата публикации

X-RAY SOURCE, HIGH-VOLTAGE GENERATOR, ELECTRON BEAM GUN, ROTARY TARGET ASSEMBLY, ROTARY TARGET, AND ROTARY VACUUM SEAL

Номер: US20180033579A1
Автор: HADLAND Roger
Принадлежит:

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode. 1. A rotary x-ray emission target for generating x-ray radiation under electron beam irradiation , comprising:a support hub defining a predetermined axis of rotation of the target;a plurality of target plates, each comprising a target material, supported on the hub, wherein the plates are arranged on the hub to provide an annular target region about the axis of rotation; anda plurality of shield elements supported on the hub and arranged to overlie portions of the target region at which ...

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Номер записи: 61
01-02-2018 дата публикации

X-RAY SOURCE, HIGH-VOLTAGE GENERATOR, ELECTRON BEAM GUN, ROTARY TARGET ASSEMBLY, ROTARY TARGET, AND ROTARY VACUUM SEAL

Номер: US20180033580A1
Автор: HADLAND Roger
Принадлежит:

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode. 1. A rotary target assembly for an x-ray source , the assembly comprising:an x-ray emission target;a vacuum housing;a shaft mounting the target and traversing a wall of the vacuum housing;a bearing rotatably supporting the shaft; anda bearing housing supporting the bearing and mounted on the wall of the vacuum housing,wherein the bearing housing is mounted on the wall of the vacuum housing by a torque-limiter such that when the torque between the bearing housing and the vacuum housing ...

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Номер записи: 62
01-02-2018 дата публикации

X-ray source, high-voltage generator, electron beam gun, rotary target assembly, rotary target, and rotary vacuum seal

Номер: US20180033581A1
Автор: Roger Hadland
Принадлежит: NIKON METROLOGY NV

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode.

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Номер записи: 63
01-02-2018 дата публикации

X-RAY SOURCE, HIGH-VOLTAGE GENERATOR, ELECTRON BEAM GUN, ROTARY TARGET ASSEMBLY, ROTARY TARGET, AND ROTARY VACUUM SEAL

Номер: US20180033582A1
Автор: HADLAND Roger
Принадлежит:

Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode. 1. A rotary x-ray emission target for generating x-ray radiation under electron beam irradiation , comprising:a support hub defining a predetermined axis of rotation of the target, anda plurality of target plates, each comprising target material, supported on the hub, wherein the plates are arranged on the hub to provide an annular target region about the axis of rotation, wherein:the hub has a first radially inner region of reduced thickness and a second radially outward region of ...

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Номер записи: 64
01-02-2018 дата публикации

SEMICONDUCTOR DEVICE FOR CONTROLLING POWER SOURCE

Номер: US20180034373A1
Автор: MATSUDA Hiroki, Murata Yukio
Принадлежит:

A semiconductor device for power supply control includes an on/off control signal generation circuit which generates a control signal for turning on or off a switching element, a high-voltage input start terminal, a power supply terminal, a switching unit, a power supply voltage control circuit which monitors voltage of the power supply terminal and turns on the switching unit when the voltage is at most a first voltage value that is predetermined, and turns off the switching unit when the voltage of the power supply terminal has reached a second voltage value higher than the first voltage value, a state control circuit which turns on or off the switching unit so that the voltage of the power supply terminal is in a narrower range than a voltage range from the first voltage value to the second voltage value, and an auxiliary winding wire short-circuiting detection circuit. 1. A semiconductor device for power supply control that generates and outputs a driving pulse for turning on or off a switching element , which intermittently supplies current to a primary-side winding wire of a transformer for voltage conversion , by an input of voltage in proportion to the current flowing in the primary-side winding wire of the transformer and an output voltage detection signal from a secondary side of the transformer , the semiconductor device comprising:an on/off control signal generation circuit which generates a control signal for turning on or off the switching element;a high-voltage input start terminal to which voltage of AC input is input;a power supply terminal to which voltage induced by an auxiliary winding wire of the transformer is input;a switching unit provided between the high-voltage input start terminal and the power supply terminal;a power supply voltage control circuit which monitors voltage of the power supply terminal and turns on the switching unit when the voltage is at most a first voltage value that is predetermined, and turns off the switching unit ...

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Номер записи: 65
09-02-2017 дата публикации

ELECTRIC VEHICLE CONTROL DEVICE

Номер: US20170036549A1
Автор: Sugahara Tetsuo
Принадлежит: Mitsubishi Electric Corporation

An electric vehicle control device includes: a main transformer to convert AC voltage input to an input winding thereof from an AC power source, and output converted AC voltage from each of a plurality of output windings; a plurality of converter main circuits, each connected to one of a plurality of secondary windings included in the output windings, to convert AC voltage output from connected secondary windings into DC voltage; and a plurality of converter controllers, each targeting for control one of the converter main circuits, to control by pulse width modulation the control-target converter main circuit, by comparing a signal wave and carrier wave. Each of the converter controllers determines a phase angle correction amount of the signal wave and/or the carrier wave, in response to operating state of a load supplied power through a predetermined output winding among the output windings. 1. An electric vehicle control device comprising:a main transformer to convert an input AC voltage, input to an input winding from an AC power supply, and to output an output AC voltage converted thereby from each of a plurality of output windings;a plurality of converter main circuits, each connected to one of a plurality of secondary windings included in the plurality of output windings, to convert the output AC voltage, output from the secondary winding connected to the converter main circuit, into a DC voltage; anda plurality of converter controllers, each to control as a control target one of the plurality of converter main circuits, by pulse width modulation control by comparison between a signal wave and a carrier wave, whereineach of the plurality of converter controllers is further to determine a correction amount of a phase angle of at least one of the signal wave and the carrier wave, in response to an operating state of a load that is supplied power through a predetermined output winding among the plurality of output windings.2. The electric vehicle control device ...

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Номер записи: 66
31-01-2019 дата публикации

SWITCHING POWER SUPPLY DEVICE

Номер: US20190036462A1
Автор: ARAI SHIGENORI, ICHIKI RYO, KATO SHINTA, TAZAKI Shintaro
Принадлежит:

A switching power supply device includes: a plurality of power supply circuits which include a first power supply circuit and a second power supply circuit and respectively correspond to a plurality of phases of a multiphase AC power supply; a switching circuit; an inrush current prevention (ICP) circuit; and a control circuit. The control circuit causes the switching circuit to switch a phase to be connected to the second power supply circuit to a phase corresponding to the first power supply circuit, and causes the ICP circuit to function so that initial charge of electrolyte capacitors included in the respective power supply circuits is performed. After the initial charge is completed, the control circuit causes the switching circuit to switch the phase to be connected to the second power supply circuit to the phase corresponding to the second power supply circuit, and causes the ICP circuit to turn off. 1. A switching power supply device comprising:a plurality of power supply circuits including a first power supply circuit and a second power supply circuit, the plurality of power supply circuits respectively corresponding to a plurality of phases of a multiphase alternating-current (AC) power supply, the plurality of power supply circuits being connected with each other at a connection point, and the plurality of power supply circuits including capacitors, respectively;a switching circuit that switches a phase to be connected to the second power supply circuit between a phase corresponding to the first power supply circuit and a phase corresponding to the second power supply circuit;an inrush current prevention circuit that prevents inrush current and is disposed on a negative power supply line of the multiphase AC power supply, at a position closer to the multiphase AC power supply than the connection point is, anda control circuit that controls the switching circuit and the inrush current prevention circuit,wherein the control circuit causes the switching ...

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Номер записи: 67
30-01-2020 дата публикации

IMPROVEMENTS IN OR RELATING TO LINE COMMUTATED CONVERTERS

Номер: US20200036281A1
Автор: Barker Carl David, WHITEHOUSE Robert Stephen
Принадлежит:

In the field of line commutated converters, for use in high voltage direct current (HVDC) power transmission, a line commutated converter () comprises 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 () which are separated by an AC terminal (A, B, C). 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 () that is configured to turn on and conduct current when it is forward biased and it receives a turn on signal and to naturally turn off and no longer conduct current when it is reverse biased and the current flowing through it falls to zero. The converter () also includes a control unit () which is programmed to, in use, control successive switching of the switching elements () whereby a first switching element () in the first limb portion group () and a second switching element () in the second limb portion group () and a different converter limb (B, C) to the first switching element () connect two corresponding AC terminals (A, C in series between the first and second DC terminals (). The control unit () is further programmed to send a third switching element () in the first limb portion group () a turn on signal whereby the third switching element () turns on and begins to conduct current while the current flowing through the first switching element () begins to fall to zero and the first switching element () prepares to naturally turn off, and to subsequently send a fourth switching element () in the second limb portion group () and a different converter limb (A, C) to the third switching element () a turn on signal whereby the fourth switching element turns () on and begins to conduct current while the current flowing through the second switching element () begins to fall to zero and the ...

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Номер записи: 68
30-01-2020 дата публикации

Ac power adapter having a switchable capacitor

Номер: US20200036307A1
Автор: Pradeep M. Pant
Принадлежит: Black and Decker Inc

A power adapter is provided to supply electric power from an alternating current from an alternating current (AC) power supply to a powered apparatus. It includes a switchable capacitor circuit housed within a housing and including: a first switch path associated with a positive half cycle of the alternating current and a second switch path associated with a negative half cycle of the alternating current, both coupled across the AC power supply. Each switch path includes a switchable capacitor in series with a switch.

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Номер записи: 69
30-01-2020 дата публикации

AC POWER ADAPTER HAVING A SWITCHABLE CAPACITOR

Номер: US20200036308A1
Автор: Pant Pradeep M.
Принадлежит:

A power adapter is provided to supply electric power from an alternating current from an alternating current (AC) power supply to a powered apparatus. It includes a switchable capacitor circuit housed within a housing and including a switchable capacitor switchably coupled across the AC power supply and a H-bridge circuit including four switches. An OFF-state of the four switches creates a charging path for the switchable capacitor, an ON-state of a first pair of the four switches creates a discharge path for the switchable capacitor during a positive half cycle of the alternating current, and an ON-state of a second pair of the four switches creates a discharge path for the switchable capacitor during a negative half cycle of the alternating current. 1. A power system configured to receive an alternating current from an alternating current (AC) power supply , the power tool system comprising:an electric motor;a switching circuit having a plurality of motor switches connected electrically between the AC power supply and the electric motor to regulate supply of power to the electric motor; anda switchable capacitor circuit comprising a switchable capacitor switchably coupled across the AC power supply and a H-bridge circuit including four switches, wherein an OFF-state of the four switches creates a charging path for the switchable capacitor, an ON-state of a first pair of the four switches creates a discharge path for the switchable capacitor during a positive half cycle of the alternating current, and an ON-state of a second pair of the four switches creates a discharge path for the switchable capacitor during a negative half cycle of the alternating current.2. The power system of claim 1 , further comprising a rectifier arranged between the AC power supply and the switching circuit to output a rectified signal on a DC power bus line.3. The power system of claim 2 , further comprising a DC bus capacitor electrically coupled in parallel with the rectifier and ...

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Номер записи: 70
04-02-2021 дата публикации

Battery charging circuit and battery charging method

Номер: US20210036612A1
Автор: Chen Zhao, Jian Deng, Qiukai Huang
Принадлежит: Hangzhou Silergy Semiconductor Technology LTD

A battery charging circuit can include: a primary rectifier circuit configured to rectify an input AC voltage into a rectified voltage signal; a DC-DC converter configured to generate a charging current according to the rectified voltage signal, in order to charge a battery; a control circuit configured to adjust the charging current by controlling an operation state of the DC-DC converter according to a charging requirement, in order to make an average value of the charging current meet the charging requirement; and where the charging current is controlled to be zero when an absolute value of the input AC voltage is lower than a predetermined threshold.

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Номер записи: 71
04-02-2021 дата публикации

System and Method for Exciting Low-Impedance Machines Using a Current Source Converter

Номер: US20210036627A1
Автор: David Allan Torrey, Yuntao Xu
Принадлежит: General Electric Co

An energy conversion system includes a low-impedance generator having at least one armature winding set. The armature winding set includes a plurality of single-phase coils. The system also includes a current source converter assembly electrically coupled to an armature of the generator. The current source converter assembly includes at least one current source converter that includes a current source rectifier coupled to a current source inverter via a DC link and at least one capacitor across the plurality of single-phase armature coils. The capacitor(s) of the current source converter(s) is configured to absorb high frequency components of current pulses generated by the current source converter so as to minimize current ripple in a current applied to the plurality of single-phase coils.

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Номер записи: 72
04-02-2021 дата публикации

FOUR-MODE TAP-SWITCHING TRANSFORMER RECTIFIER

Номер: US20210036629A1
Автор: Joyce Thomas P.
Принадлежит:

Systems and methods for operating a transistor rectifier unit are provided. Aspects include providing a first transformer output and a second transformer output, providing a plurality of rectifier circuits, wherein the plurality of rectifier circuits comprises a first rectifier coupled to the first transformer output and a second rectifier coupled to the second transformer output, and wherein the first rectifier comprises a first output voltage and the second rectifier comprises a second output voltage, operating a plurality of switches based on a plurality of operational modes, wherein the plurality of operational modes comprises a first mode, a second mode, and a third mode, and wherein the plurality of switches comprises a first switch, a second switch, and a third switch. 1. A system comprising:a transformer comprising a first transformer output and a second transformer output;a plurality of rectifier circuits, wherein the plurality of rectifier circuits comprises a first rectifier coupled to the first transformer output and a second rectifier coupled to the second transformer output, andwherein the first rectifier comprises a first output voltage and the second rectifier comprises a second output voltage;a plurality of switches, wherein the plurality of switches comprises a first switch, a second switch, and a third switch; and determining the first output voltage is less than a low threshold voltage; and', 'based on determining the first output voltage is less than the low threshold voltage, causing the logic circuit to:', 'operate the first switch in a closed state,', 'operate the second switch in a closed state, and', 'operate the third switch in an open state., 'a logic circuit configured to operate the plurality switches based on a plurality of operational modes, wherein the plurality of operational modes comprises a first mode, a second mode, and a third mode; and wherein operating the plurality of switches based on the first mode comprises2. (canceled)3. ...

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Номер записи: 73
04-02-2021 дата публикации

AC-DC CONVERTER AND AC-DC RECTIFIER

Номер: US20210036631A1
Автор: Deng Jian, YAO KAIWEI
Принадлежит:

An AC-DC converter can include: a rectifying circuit configured to convert an AC input voltage into a DC voltage, where at least one active switching device is included in one conductive rectifying loop of the rectifying circuit; a control circuit configured to control switching states of the active switching devices according to an output voltage of the AC-DC converter and the AC input voltage, in order to decrease an error between the DC voltage and the output voltage of the AC-DC converter; and a DC-DC converter configured to convert the DC voltage into the output voltage of the AC-DC converter. 1. An AC-DC converter , comprising:a) a rectifying circuit configured to convert an AC input voltage into a DC voltage, wherein at least one active switching device is included in one conductive rectifying loop of the rectifying circuit;b) a control circuit configured to control switching states of the active switching devices according to an output voltage of the AC-DC converter and the AC input voltage, in order to decrease an error between the DC voltage and the output voltage of the AC-DC converter; andc) a DC-DC converter configured to convert the DC voltage into the output voltage of the AC-DC converter.2. The AC-DC converter of claim 1 , wherein the control circuit is configured to adjust the DC voltage to decrease a ratio of the output voltage to the DC voltage.3. The AC-DC converter of claim 2 , further comprising an input capacitor coupled between the rectifying circuit and DC-DC converter.4. The AC-DC converter of claim 1 , wherein the rectifying circuit is a single-phase bridge rectifying circuit.5. The AC-DC converter of claim 4 , wherein rectifying devices in at least one bridge arm of the single-phase bridge rectifying circuit are active switching devices.6. The AC-DC converter of claim 4 , wherein at least one of the rectifying devices connected with one terminal of an output port of the rectifying circuit are active switching devices.7. The AC-DC ...

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Номер записи: 74
04-02-2021 дата публикации

UNINTERRUPTIBLE POWER SUPPLY APPARATUS

Номер: US20210036632A1
Автор: HAYASHI Yousuke
Принадлежит: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION

In the present uninterruptible power supply apparatus (U), in a power failure of a commercial AC power supply (), a switch () is turned off to electrically cut off the commercial AC power supply () from an AC input filter (), and when DC voltage (ΔE=Ep−En) that is the difference between terminal-to-terminal voltages (Ep, En) of first and second capacitors (C C) exceeds a threshold voltage (ETH), first and second IGBT devices (Q Q) or third and fourth IGBT devices (Q Q) included in the converter () are turned on and off to reduce DC voltage (ΔE). 1. An uninterruptible power supply apparatus comprising:first to third DC lines;a first capacitor connected between the first and second DC lines;a second capacitor connected between the second and third DC lines;a neutral line connected to a neutral terminal of a three-phase four-wire AC power supply, the second DC line, and a neutral terminal of a three-phase four-wire load;a switch disposed corresponding to each phase of the AC power supply, having one terminal receiving AC voltage of a corresponding phase supplied from the AC power supply, turned on in a sound state of the AC power supply, and turned off in a power failure of the AC power supply;an AC input filter including a third capacitor connected between the other terminal of the switch and the neutral line, and a reactor having one terminal connected to the other terminal of the switch;a converter connected between the other terminal of the reactor and the first to third DC lines, and including a first multi-level circuit that converts AC voltage and first to third DC voltages to each other, the converter being configured to convert AC power from the AC power supply to DC power and supply the DC power to the first to third DC lines in a sound state of the AC power supply;a DC voltage converter connected between a DC power supply source and the first to third DC lines, and including a second multi-level circuit that converts a fourth DC voltage supplied from the DC ...

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Номер записи: 75
12-02-2015 дата публикации

Power conversion device

Номер: US20150043253A1
Автор: Kazutoshi AWANE
Принадлежит: Mitsubishi Electric Corp

A power conversion device 300 includes: an AC/DC converter section 10 which has an initial charging circuit 36 that initially charges a smoothing capacitor 22 provided at an output portion, and converts alternating current power into direct current power; a DC/DC converter section 11 which performs voltage conversion of direct current power supplied from the smoothing capacitor 22 ; and a control unit 5 which controls output of the AC/DC converter section 10 and output supplied from the DC/DC converter section 11 . The control unit 5 performs a predetermined charging from the initial charging circuit 36 to the smoothing capacitor 22 at start-up of the AC/DC converter section 10 , and starts the operation of the DC/DC converter section 11 after completion of charging, whereby the circuit can be protected from an inrush current at start-up.

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Номер записи: 76
11-02-2016 дата публикации

POWER-TYPE VOLTAGE-MULTIPLYING DRIVING CIRCUIT AND ELECTRIC NAIL GUN USING POWER-TYPE VOLTAGE-MULTIPLYING DRIVING CIRCUIT

Номер: US20160043656A1
Автор: Fan Yue, FENG Zezhou, LIAO Zhiwen
Принадлежит: BEIJING DAFENG TECHNOLOGY LTD.

With respect to a defect that a large-size capacitor is required to implement voltage multiplication in the prior art, the present invention provides a power-type voltage-multiplying driving circuit capable of overcoming the defect. An alternating current power supply J a unidirectional conducting element D and a charge storing element C are connected in series to form a charging circuit for charging the charge storing element C. A parallel circuit formed by the charge storing element C and the unidirectional conducting element D is connected in series to the alternating current power supply J a load R, and a switch element SCR to form a load driving circuit for performing voltage multiplication driving on the load R. A control unit KZ detects the voltage of the alternating current power supply J and controls, based on the detected voltage, ON and OFF of the switch element SCR, so as to perform voltage multiplication driving on the load R by means of the mutual cooperation between the control unit KZ, the alternating current power supply J the charge storing element C, and the switch element SCR after the unidirectional conducting element D charges the charge storing element C, the voltage driving the load R being adjusted between 1 and 2 times of the peak voltage of the alternating current power supply J 1. A power-type voltage-multiplying driving circuit , comprising:{'b': 1', '1, 'a charging circuit, formed by connecting an AC power supply J, a unidirectional conducting element D, and a charge storing element C connected in series, and configured to charge the charge storing element C;'}{'b': 1', '3, 'a load driving circuit, formed by connecting a parallel circuit with the AC power supply J, a load R, and a switching element SCR in series, configured to drive the load R by voltage-multiplication, wherein the parallel circuit including the charge storing element C and a unidirectional conducting element D connected in parallel; and'}{'b': 1', '1', '1', '1, 'a ...

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Номер записи: 77
24-02-2022 дата публикации

Method for calculating maximum output current of multiple thyristor converters connected in parallel

Номер: US20220060106A1
Автор: Liansheng Huang, Peng Fu, Shiying HE, Tao Chen, Tianbai DENG, Xiaojiao CHEN, Xiuqing Zhang, Zhenshang WANG, Zhongma WANG
Принадлежит: Hefei Institutes of Physical Science of CAS

A method for calculating a maximum output current of multiple thyristor converters connected in parallel, step 1 : setting an operating time t; step 2 : assuming a trigger angle; step 3 : calculating a maximum output current of a single converter according to an output current model for the single converter; step 4 : equally dividing a total output DC current into a plurality of parts according to a working duration of six converter bridge arms, thereby obtaining a pulse operating current of a single bridge arm; step 5 : checking whether a present junction temperature of a thyristor is below a limiting temperature based on a thermal resistance model for the thyristor, if no, correcting the trigger angle, and repeating step 2 to step 5 until the condition is met; step 6 : giving a present trigger angle; and step 7 : giving a maximum output current of multiple converters connected in parallel.

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Номер записи: 78
19-02-2015 дата публикации

DEVICE AND METHOD FOR HARVESTING, COLLECTING OR CAPTURING AND STORING AMBIENT ENERGY

Номер: US20150048682A1
Автор: Murley Alan Joseph
Принадлежит: RAFFE Technologies, Inc.

An ambient energy collector for use in AC/DC applications is described. The ambient energy collector has at least one ambient energy collecting antenna system and a master control unit for operational control of the at least one ambient energy collecting antenna system. The ambient energy collector has a DC voltage boosting circuit for increasing an input voltage, a DC primer power source for powering up the voltage boosting circuit via the input voltage, at least one antenna system for collecting ambient energy, an energy collection circuit for converting and amplifying an AC voltage collected by the antenna of the at least one antenna system into a DC voltage, and an output circuit for providing a load with the DC voltage. 1. A device for collecting ambient energy comprising:{'b': '10', 'claim-text': [{'b': '11', 'at least one antenna () for collecting ambient energy,'}, {'b': '12', 'a primary start-up boost circuit (PSUBC) () for increasing an input voltage,'}, {'b': 15', '12, 'at least one DC primer source () for powering up the primary start-up boost circuit () via the input voltage, and'}, {'b': 14', '11, 'an energy collection circuit (ECC) () for converting and amplifying an AC voltage collected by the antenna (),'}], 'at least one antenna system () comprising{'b': 20', '10, 'a master controller unit () for operational control of the at least one antenna system (), and'}{'b': '30', 'an output for providing a load () with an output voltage.'}2101311. The device according to claim 1 , wherein the antenna system () further comprises an RF frequency sensor circuit (RFFSC) () for determining an optimum frequency for the at least one antenna () to collect ambient energy.310212014. The device according to claim 1 , wherein the antenna system () further comprises a regulator recovery circuit () for recovering an excess capacitance energy and via the micro controller unit () provides the excess capacitance energy to the energy collection circuit ().41021201314. The ...

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Номер записи: 79
19-02-2015 дата публикации

Ups systems and methods using current-controlling low-loss modes

Номер: US20150048691A1
Автор: George Arthur Navarro
Принадлежит: Eaton Corp

Some embodiments provide a UPS including a non-current-commutated solid-state bypass switch. The bypass switch may include at least one transistor configured to control current to the load. Further embodiments provide a UPS including a converter including a first half-bridge circuit having an input port configured to be coupled to an AC source and an output port coupled to first and second buses and a second half-bridge circuit having an output port configured to be coupled to a load and an input port coupled to the first and second buses. The UPS further includes a control circuit configured to control the converter to provide a first mode wherein the first bridge circuit and the second bridge circuit operate as a rectifier and an inverter, respectively, and a second mode wherein the first and second bridge circuits operate as a pass-through switch from the AC source to the load.

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Номер записи: 80
07-02-2019 дата публикации

POWER SUPPLY APPARATUS

Номер: US20190044439A1
Автор: Ohshima Shunzou
Принадлежит:

A full-wave rectifier-circuit () supplies a pulsating-DC-voltage (Vdc) obtained by rectifying an AC voltage (Vac). A switching element (T) consisting of a power supply apparatus () is turned on during a fixed on-period Mon and turned off during a fixed off-period Moff (=M−Mon) in each fixed control period M. When the switching element (T) is turned on, a current (I) caused by electric charge accumulated in a capacitor (C) flows through a path formed by an inductor (L) and the switching element (T). When the switching element (T) is turned off, a flywheel current (I) caused by electromagnetic energy accumulated in the inductor (L) flows through a path formed by a diode (D) and a parallel circuit consisting of a capacitor (C) and a load (), and a current (I) is supplied from the full-wave rectifier circuit () to the capacitor (C) via an inductor (L). A power supply apparatus () is configured such that the current (I) continues to flow through the capacitor (C) while the switching element (T) is off. 1. A power supply apparatus comprising:a first DC power source that generates a DC voltage obtained by rectifying an AC voltage between a positive, electrode and a negative electrode,a power supply circuit that is arranged between the first DC power source and a load, anda control circuit that controls the power supply circuit,wherein:the power supply circuit includes a first capacitor, a second capacitor, a first inductor, a second inductor, a diode, and a first switching element,the first capacitor is electrically connected in parallel with the load,a first series circuit comprises the second inductor and the second capacitor, the first series circuit being electrically connected between the positive electrode and the negative electrode of the first DC power source,a second series circuit comprises the first inductor, a parallel circuit, which comprises the first capacitor and the load, and the first switching element, the second series circuit being electrically ...

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Номер записи: 81
16-02-2017 дата публикации

Power Quality Enhancement

Номер: US20170047859A1
Автор: Laurence P. Sadwick
Принадлежит: Individual

A power supply includes an alternating current input, a rectifier operable to generate a rectified signal based on the alternating current input, a voltage multiplier configured to generate a multiplied voltage based on the alternating current input, and an output configured to yield an electrical current based on the rectified signal from the rectifier and on the multiplied voltage from the voltage multiplier. Current is drawn from the alternating current input only during a fraction of each half-cycle of a waveform at the alternating current input.

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Номер записи: 82
08-05-2014 дата публикации

START-UP CIRCUIT AND METHOD WITH SOFT-START SCHEME FOR AC-DC CONVERTERS

Номер: US20140126254A1
Автор: AL-SHYOUKH Mohammad, NEYRA Percy
Принадлежит: Taiwan Semiconductor Manufacturing Company, Ltd.

An AC-DC power converter includes a rectifying unit, an output stage, a controller and a soft-start circuit. The rectifying unit is configured to rectify an AC voltage to a rectified voltage. The output stage is coupled to the rectifying unit and configured to convert the rectified voltage into a DC voltage for a load. The controller is coupled to the output stage and configured to control the output stage. The soft-start circuit is coupled to the rectifying unit to receive the rectified voltage. The soft-start circuit is configured to detect whether the rectified voltage is at or below a predetermined level, and to enable the controller if the rectified voltage is detected to be at or below the predetermined level. 1. An AC-DC power converter , comprising:a rectifying unit configured to rectify an AC voltage to a rectified voltage;an output stage coupled to the rectifying unit and configured to convert the rectified voltage into a DC voltage for a load;a controller coupled to the output stage and configured to control the output stage; anda soft-start circuit coupled to the rectifying unit to receive the rectified voltage, the soft-start circuit configured to detect whether the rectified voltage is at or below a predetermined level and to enable the controller if the rectified voltage is detected to be at or below the predetermined level.2. The AC-DC power converter of claim 1 , wherein the soft-start circuit is configured to enable the controller if the rectified voltage decreases from the predetermined level.3. The AC-DC power converter of claim 1 , wherein the predetermined level is equal to or less than 10% of a maximum voltage level of the rectified voltage.4. The AC-DC power converter of claim 1 , wherein the predetermined level is 15-20V.5. The AC-DC power converter of claim 1 , wherein the soft-start circuit comprises:a voltage detector configured to detect whether the rectified voltage is at or below the predetermined level and to generate a soft-start ...

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Номер записи: 83
08-05-2014 дата публикации

Two-wire load control device for low-power loads

Номер: US20140126261A1
Автор: Daniel F. Carmen, Robert C. Newman, Jr.
Принадлежит: Lutron Electronics Co Inc

A load control device for controlling the power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting a gate current through a gate of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct the gate current through a first current path to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct the gate current through the first current path again after the firing time, but the gate current is not able to be conducted through the gate from a transition time before the end of the half-cycle until approximately the end of the half-cycle. The load current is able to be conducted through a second current path to the electrical load after the transition time until approximately the end of the half-cycle.

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Номер записи: 84
03-03-2022 дата публикации

SYSTEMS, METHODS, AND DEVICES FOR FIRE CONTROL SYSTEM POWER SWITCHING

Номер: US20220068100A1
Автор: Gordon Arkady, Xu Xiaoka
Принадлежит:

Systems, methods, and devices for fire control system power switching are described herein. One embodiment includes an alternating current (AC) power source, a battery, a notification component, and a control circuit, comprising an LLC circuit comprising an LLC controller component, a transformer component, a rectifier and feedback component, and an opto-coupler component. The LLC circuit can be configured to reduce an LLC output voltage from a first LLC voltage to a second LLC voltage while the notification component is using power supplied by the battery. The control circuit can include a battery-plane voltage transfer component configured to disconnect the battery from a plane voltage of the control circuit and an AC/DC-plane transfer component configured to connect the second LLC output voltage to the plane voltage to supply power from the AC power source. 1. A fire control system , comprising;an alternating current (AC) power source;a battery;a notification component; an LLC circuit comprising an LLC controller component, a transformer component, a rectifier and feedback component, and an opto-coupler component, wherein the LLC circuit is configured to reduce an LLC output voltage from a first LLC voltage to a second LLC voltage while the notification component is using power supplied by the battery;', 'a battery-plane voltage transfer component configured to disconnect the battery from a plane voltage of the control circuit;', 'an AC/DC-plane transfer component configured to connect the second LLC output voltage to the plane voltage to supply power from the AC power source., 'a control circuit, comprising2. The system of claim 1 , further comprising a controlled load component claim 1 , wherein:when the AC power source is off and the battery is on, the controlled load component is configured to be connected to the control circuit.3. The system of claim 1 , wherein the controlled load component includes a resistor and a N-MOSFET.4. The system of claim 3 , ...

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Номер записи: 85
25-02-2016 дата публикации

Power supply apparatus with controllable multiple input rectification

Номер: US20160056632A1
Автор: Anders Hansson, Jonas HALLSTRÖM
Принадлежит: Flexenclosure (publ) AB

A power supply apparatus for providing electrical power to a power consuming device or a power conversion device from at least one of a first AC power source and a second AC power source. The power supply apparatus comprises controllable rectifier devices associated with each of the first and second AC power sources. The controllable rectifier devices are controllable to simultaneously rectify and control the power provided by the first and second AC power sources.

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Номер записи: 86
10-03-2022 дата публикации

Charging device and method of control of the same

Номер: US20220072963A1
Автор: Toshihiko Minamii
Принадлежит: Toyota Motor Corp

If sensed a connector as being connected to an inlet, an ECU performs pre-charging of a capacitor. When pre-charging of the capacitor is completed, the ECU closes a relay, and controls a U-phase boost chopper circuit to boost a voltage of the capacitor. The ECU closes relays if the voltage is boosted to a second target voltage.

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Номер записи: 87
13-02-2020 дата публикации

Control device of rotary electric machine

Номер: US20200052577A1
Автор: Takeo Saito, Yasuhiko Kondo
Принадлежит: Honda Motor Co Ltd

A control device of a rotary electric machine capable of preventing occurrence of electrical resonance when a conversion operation abnormality of a DC voltage converter occurs is provided. In a case that the DC voltage converter stops a conversion operation and the conversion operation abnormality that input/output voltages become equal occurs, when a vehicle speed proportional to an electric motor rotation number exceeds a torque limit start vehicle speed, i.e., when the electric motor rotation number exceeds a torque limit start rotation number, a torque limit control for limiting an output torque of the electric motor is executed. The torque limit start vehicle speed is set to a vehicle speed corresponding to a lower limit frequency of a predetermined frequency range where there is a high likelihood of an electrical resonance occurring in the DC voltage converter when the conversion operation abnormality occurs.

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Номер записи: 88
13-02-2020 дата публикации

SWITCHING POWER SUPPLY DEVICE

Номер: US20200052606A1
Автор: Mochizuki Kento, TAZAKI Shintaro
Принадлежит:

The switching power supply device is provided with: a plurality of power supply circuits corresponding to phases of a multi-phase AC power supply; a switching circuit that is capable of switching a phase connected to a power supply circuit not corresponding to one discretionary phase of the multi-phase AC power supply between the one discretionary phase and a phase to which the power supply circuit corresponds; an inrush current prevention circuit for preventing inrush current that is provided on a negative-electrode-side power supply line of the multi-phase AC power supply and at a position further toward the multi-phase AC power supply than is a connection point to which each of the plurality of power supply circuits are connected; and a filter circuit that is provided between the multi-phase AC power supply and the inrush current prevention circuit and has all lines of the plurality of phases magnetically coupled thereto. 1. A switched-mode power supply device provided with a plurality of power supply circuits that correspond to phases of a polyphase alternator , the switched-mode power supply device comprising:a switching circuit that allows switching of a phase connected to one of the plurality of power supply circuits not corresponding to a certain phase of the polyphase alternator, the switching being done between the certain phase and a phase to which the power supply circuit corresponds;an inrush current prevention circuit that is disposed on a power supply line on a negative electrode side of the polyphase alternator and is disposed at a position closer to the polyphase alternator than a connection point at which the plurality of power supply circuits are connected is to the polyphase alternator, the inrush current prevention circuit being configured to prevent an inrush current; anda filter circuit disposed at a position closer to the polyphase alternator than the switching circuit and the inrush current prevention circuit are to the polyphase alternator, ...

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Номер записи: 89
05-03-2015 дата публикации

Power factor correction circuit

Номер: US20150062986A1
Автор: Chan Gi Park, Ho Sang Jin, Jae Ho Lee
Принадлежит: LSIS Co Ltd

Provided is a power factor correction circuit correcting a power factor of AC voltage. The power factor correction circuit includes: a rectifying unit stopping rectifying the AC voltage in a transient state and generating an rectified voltage by rectifying the AC voltage in a steady state; a power factor correction unit generating a power-factor-corrected voltage by correcting the rectified voltage; a smoothing unit generating a smoothed voltage by smoothing the power-factor-corrected voltage; and an inrush current limiting unit providing a limited current by limiting an inrush current generated by the AC voltage in the transient state and stopping providing a current to the smoothing unit.

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Номер записи: 90
21-02-2019 дата публикации

Converter and power conversion device using same

Номер: US20190058414A1
Автор: Kazunori Sanada, Keisuke Ohnishi, Shoichi Abe
Принадлежит: Toshiba Mitsubishi Electric Industrial Systems Corp

A converter includes a first diode having an anode and a cathode connected respectively to an input terminal and a first output terminal, a second diode having an anode and a cathode connected respectively to a second output terminal and the input terminal, a first transistor connected between the first output terminal and the input terminal, a second transistor connected between the input terminal and the second output terminal, and a bidirectional switch connected between the input terminal and a third output terminal and including third to sixth diodes and a third transistor. Each of the first diode, the second diode, and the third transistor is made of a wide bandgap semiconductor. Each of the first and second transistors and the third to sixth diodes is made of a semiconductor other than the wide bandgap semiconductor.

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Номер записи: 91
22-05-2014 дата публикации

Monolithic AC/DC Converter for Generating DC Supply Voltage

Номер: US20140140115A1
Автор: Balakrishnan Balu, Kung David
Принадлежит: POWER INTEGRATIONS, INC.

An integrated circuit (IC) comprises a rectifier/regulator circuit coupled to receive an ac source voltage and output a regulated dc voltage. The rectifier/regulator circuit includes first and second switching elements that provide charging current when enabled. The first and second switching elements do not provide charging current when disabled. A sensor circuit is coupled to sense the regulated dc voltage and generate a feedback control signal coupled to the rectifier/regulator circuit that enables the first and second switching elements when the regulated do voltage is above a target voltage, and disables the first and second switching elements when the regulated do voltage is below the target voltage. 115-. (canceled)16. An integrated circuit (IC) comprising:a regulator circuit coupled to receive an ac source line voltage of between 85 to 265 V AC across first and second input terminals and output a regulated dc supply voltage across first and a second output terminals, the regulator circuit including first and second high-voltage switching elements that selectively provide charging current when enabled, the first and second high-voltage switching elements capable of supporting a voltage difference between the ac line voltage and the regulated dc supply voltage; anda sensor circuit coupled to sense the regulated dc supply voltage and generate a feedback signal to control the first and second high-voltage switching elements, wherein the feedback signal turns off the first and second switching elements when the regulated dc voltage is above a target voltage, and turns on the first and second switching elements when the regulated dc voltage is below the target voltage.17. The IC of wherein the first and second switching elements are respectively coupled to first and second input terminals.18. The IC of wherein the sensor circuit includes a supply capacitor coupled between the first and second output terminals claim 16 ,19. The IC of wherein the sensor circuit ...

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Номер записи: 92
03-03-2016 дата публикации

System and Method for a Switch Having a Normally-on Transistor and a Normally-off Transistor

Номер: US20160065064A1
Автор: Bernhard Zojer
Принадлежит: INFINEON TECHNOLOGIES AUSTRIA AG

In accordance with an embodiment, a circuit includes a first driver having a first output configured to be coupled to a control node of a normally-off transistor. The first driver is configured to drive a first switching signal at the first output in a cascode mode and configured to drive a first constant voltage at the first output in a direct drive mode. The circuit further includes a second driver having a second output configured to be coupled to a control node of a normally-on transistor that has a second load path terminal coupled to a first load path terminal of the normally-off transistor. The second driver is configured to drive a second switching signal at the second output in the direct drive mode.

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Номер записи: 93
01-03-2018 дата публикации

Power conversion device

Номер: US20180062498A1
Автор: Akihiro Matsuda, Hisanori Taguchi, Kaho MUKUNOKI, Ryosuke UDA, Taichiro Tsuchiya, Takushi Jimichi, Toshiyuki Fujii
Принадлежит: Mitsubishi Electric Corp, Toshiba Mitsubishi Electric Industrial Systems Corp

When switching operations of converter cells are stopped due to temporary voltage reduction in an AC system, a voltage determination unit performs determination regarding a voltage of each DC capacitor after a predetermined period has passed, and a charge control unit transmits a charging gate signal, via a gate control unit, to select a converter cell at a voltage level at which a self-feeding circuit of the converter cell is operable. Thus, a DC capacitor of a converter cell whose voltage is lower than the voltage level at which a self-feeding circuit is operable is charged, thereby enabling switching operations of all the converter cells.

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Номер записи: 94
01-03-2018 дата публикации

STATOR DEVICE FOR A LINEAR MOTOR, LINEAR DRIVE SYSTEM, AND METHOD FOR OPERATING A STATOR DEVICE

Номер: US20180062535A1
Автор: Kaulmann Tim, Pruessmeier Uwe, Vorbohle Thomas
Принадлежит:

A linear motor comprises a stator, the stator comprising multiple drive coils and an intermediate circuit electrically conductively connected to each drive coil, the intermediate circuit being configured to exchange energy with each drive coil. The drive coils are arranged along the running rail, where at least one slide comprising a magnet acting as a rotor of the linear motor is movably arranged on the running rail. A controller is configured to independently control each drive coil, so that electrical energy is fed from the intermediate circuit into the drive coils, if a measured intermediate circuit voltage is greater or equal to a predetermined intermediate circuit voltage threshold value, where those drive coils are excluded from the feed-in of the electrical energy which are instantaneously being used for driving or braking the at least one slide and/or have a thermal load which exceeds a predetermined thermal load threshold value. 1. A stator device for a linear motor , comprising:multiple drive coils, each drive coil being configured to be independently impressed by a direct current so as to generate a magnetic field which is suitable to interact with a magnetic field of a magnetic rotor thereby to drive or to brake the magnetic rotor;multiple DC voltage converters, each connected to a respective drive coil;an intermediate circuit electrically conductively connected to each drive coil via the respective DC voltage converter, the intermediate circuit being configured to exchange energy with each drive coil via the respective DC voltage converter;a voltage measuring device being configured to measure an intermediate circuit voltage; anda control device connected to the voltage measuring device and to the multiple DC voltage converters, the control device being configured to independently control each DC voltage converter, in such a way that electrical energy is fed from the intermediate circuit into the drive coil corresponding to the controlled DC voltage ...

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Номер записи: 95
12-03-2015 дата публикации

DEVICE FOR TRANSFERING POWER FROM A FIRST CIRCUIT TO A SECOND CIRCUIT

Номер: US20150070949A1
Автор: Morgan Mark W., Mukhopadhyay Rajarshi
Принадлежит:

A power transfer system for transferring power from a first circuit to a second circuit by a differential signal generated in the first circuit includes a first isolation element for transmitting a first component of the differential signal between the first and second circuits. The system also includes a second isolation element for transmitting a second component of the differential signal between the first and second circuits. A digital rectifier is coupled to the first and second isolation elements for generating a rectified voltage in response to the first and second components of the differential signal. The system includes circuitry for monitoring the rectified voltage and generating a signal representative of the rectified voltage. The system also includes a controller for changing the rectified voltage in response to the signal representative of the rectified voltage. 1. A system for transferring power from a first circuit to a second circuit by a differential signal generated in the first circuit , the system comprising:a first isolation element for transmitting a first component of the differential signal between the first and second circuits;a second isolation element for transmitting a second component of the differential signal between the first and second circuits, the second component being a complement of the first component;a digital rectifier coupled to the first and second isolation elements for generating a rectified voltage in response to the first and second components of the differential signal;circuitry for monitoring the rectified voltage and generating a signal representative of the rectified voltage; anda controller for changing the rectified voltage in response to the signal representative of the rectified voltage.2. The system of wherein the first and second isolation elements are capacitors.3. The system of further comprising a variable resistance coupled to the Output of the digital rectifier claim 1 , wherein the controller controls ...

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Номер записи: 96
17-03-2022 дата публикации

Converter device, motor drive device and air conditioner

Номер: US20220085730A1
Автор: Keisuke Uemura, Kenji Iwazaki, Koichi Arisawa, Satoru Ichiki, Takuya Shimomugi
Принадлежит: Mitsubishi Electric Corp

A converter device includes: a power conversion circuit including a reactor and a switching element, rectifying a voltage of alternating-current power supplied from an alternating-current power supply to a direct-current voltage, and boosting and outputting the direct-current voltage; a current detector detecting a current flowing in the reactor; a filter circuit filtering a first signal detected by the current detector; and a control unit generating a control signal on the basis of a carrier and a second signal generated by the filter circuit and controlling, on the basis of the control signal and with a first period, the switching element, the first period being a period of the carrier. The filter circuit cuts off a repetition frequency component in the first period and passes a repetition frequency component in a second period, the second period being longer than the first period.

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Номер записи: 97
17-03-2022 дата публикации

Converter Cell with Crowbar

Номер: US20220085731A1
Автор: MOHANAVEERAMANI Aravind, NAMI Alireza, Svensson Jan
Принадлежит:

The present disclosure relates to a converter cell () for a power converter. The cell comprises a plurality of semiconductor devices (T) forming a half-bridge or full-bridge topology in the cell. The cell also comprises an energy storage () connected across the at least one switch leg (). The cell also comprises a crowbar leg () connected across the at least one switch leg, comprising a plurality of series connected semiconductor crowbar switches (C) arranged to short-circuit the energy storage (). The cell also comprises first and second AC terminals (A, B), wherein at least one of said AC terminals is connected to one of the at least one switch leg, between two of the plurality of series connected semiconductor devices of said switch leg, and connected to the crowbar leg, between two of the plurality of series connected crowbar switches of said crowbar leg. 141. A converter cell () for a power converter () , the cell comprising:{'b': '6', '#text': 'a plurality of semiconductor devices (T) forming a half-bridge or full-bridge topology in the cell with at least one switch leg () comprising a plurality of the semiconductor devices connected in series, each semiconductor device comprising a switch (S) and an anti-parallel diode (D);'}{'b': ['5', '6'], '#text': 'an energy storage () connected across the at least one switch leg ();'}{'b': ['7', '6', '5'], '#text': 'a crowbar leg () connected across the at least one switch leg (), said crowbar leg comprising a plurality of series connected semiconductor crowbar switches (C) arranged to short-circuit the energy storage () when the crowbar switches are switched to conducting; and'}{'b': ['6', '7', '2'], '#text': 'first and second AC terminals (A, B), wherein at least one of said AC terminals is connected to one of the at least one switch leg (), between two of the plurality of series connected semiconductor devices (T) of said switch leg, and connected to the crowbar leg (), between two of the plurality of series connected ...

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Номер записи: 98
08-03-2018 дата публикации

POWER CONVERTER

Номер: US20180069404A1
Автор: Eckerle John, Flum Dominik, Schlegel Christian, Schult Matthias
Принадлежит:

A method is provided for connecting a main converter, e.g. for use in a power plant for regenerative energy having a generator, to a power grid. The method includes providing energy from the pre-charge unit to at least one of at least two converter paths. The at least one converter path is pre-charged using the energy provided from the pre-charge unit. At least one further converter path of the at least two converter paths is pre-charged using the energy provided from the pre-charge unit via the at least one converter path through the grid side converter of the at least one converter path and the grid side converter of the at least one further converter path. The main converter is connected to the power grid by closing the grid breaker. 1. A method for connecting a main converter to a power grid , the main converter comprising a grid breaker provided at a power grid side of the main converter , and at least two converter paths comprising each a central DC link , a grid side converter and a generator side converter , both connected to the DC link , and a pre-charge unit connected to the power grid and to at least one of the at least two converter paths , comprising the steps of:providing energy from the pre-charge unit to at least one of the at least two converter paths,pre-charging the at least one converter path using the energy provided from the pre-charge unit,pre-charging at least one further converter path of the at least two converter paths using the energy provided from the pre-charge unit via the at least one converter path through the grid side converter of the at least one converter path and the grid side converter of the at least one further converter path, andconnecting the main converter to the power grid by closing the grid breaker.2. A main converter connected to a power grid , the main converter comprising a grid breaker provided at a power grid side of the main converter , and at least two converter paths comprising each a central DC link , a grid ...

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Номер записи: 99
09-03-2017 дата публикации

LOAD CONTROL DEVICE FOR HIGH-EFFICIENCY LOADS

Номер: US20170070161A1
Автор: MacAdam Russell L., Parent Joseph T., Weightman Russell
Принадлежит: LUTRON ELECTRONICS CO., INC.

A load control device for controlling power delivered from an AC power source to an electrical load may comprise a thyristor, a gate current path, and a control circuit. The control circuit may be configured to control the gate current path to conduct a pulse of gate current through a gate terminal of the thyristor to render the thyristor conductive at a firing time during a half-cycle of the AC power source. The control circuit may operate in a first gate drive mode in which the control circuit renders the gate current path non-conductive after a pulse time period from the firing time. The control circuit may operate in a second gate drive mode in which the control circuit maintains the gate current path conductive after the pulse time period during the half-cycle. 1. A load control device for controlling power delivered from an AC power source to an electrical load , the load control device comprising:a thyristor adapted to be electrically coupled between the AC power source and the electrical load, the thyristor comprising a first main terminal, a second main terminal, and a gate terminal, the first and second main terminals configured to conduct current to energize the electrical load, the gate terminal configured to conduct current to render the thyristor conductive;a gate current path connected to the gate terminal, the gate current path comprising a gate coupling circuit and configured to conduct current through the gate terminal of the thyristor; anda control circuit electrically coupled to the gate coupling circuit to control the gate current path, the control circuit configured to control the gate current path to conduct a pulse of the current through the gate terminal of the thyristor to render the thyristor conductive at a firing time during a half-cycle of the AC power source, the control circuit further configured to operate in a first gate drive mode and a second gate drive mode,wherein, in the first gate drive mode, the control circuit renders the ...

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Номер записи: 100