Class / Patent application number | Description | Number of patent applications / Date published |
363067000 | Plural rectifiers | 51 |
20080198637 | Multilevel AC/DC converter for traction applications - The present disclosure is concerned with a power supply system for railway traction applications including a multilevel AC/DC converter. The converter comprises a plurality of series-connected single-stage cycloconverters or direct AC frequency converters connected between an AC supply line and a traction transformer. The transformer is operable at a transformer nominal frequency below 3 kHz and above the AC line frequency. On the secondary side of the transformer, more than one parallel-connected secondary converter are provided and connected to a DC link. In case of failure of one of the secondary converters, the multilevel AC/DC converter may continue to operate with reduced power delivered by the remaining operating levels. | 08-21-2008 |
20080205100 | SEMICONDUCTOR CIRCUIT - A synchronous rectifying drive type semiconductor circuit wherein voltages between drains and sources of power switching elements are detected, temporarily held and compared with a reference voltage. First control signals are generated for turning on the power switching elements depending on comparison result and dead times for the power switching elements are minimized by ORing first control signals and second control signals inputted at input terminals. The first control signals cause the power switching elements to be in “on” state for a constant time until the second control signals as “on” control signals arrive at the input terminals, and then the first control signals as “on” control signals are terminated before the second control signals as “off” signals arrive at the input terminals, thereby swiftly turning off the power switching elements by the second control signals arriving at the input terminals. | 08-28-2008 |
20080298100 | CONTACTLESS POWER RECEIVING UNIT AND ELECTRONIC DEVICE EMPLOYING THE SAME - Provided is a contactless power receiving unit which has a simple configuration, and which is capable of generating constant induced electromotive force regardless of the orientation of a power receiving coil. Multiple power receiving coils are arranged to form certain relative angles to one another in a parallel magnetic field generated by a power supply unit. A rectifier circuit is connected to each power receiving coil. An adder circuit is configured to add DC power obtained, through the rectifier circuits, from the multiple power receiving coils, and to output resultant DC power of the addition. | 12-04-2008 |
20090273956 | MODULAR CONVERTER FOR CONVERTING THE ELECTRIC POWER PRODUCED BY AEROGENERATORS, AND WIND-POWER PLANT THAT USES SAID CONVERTER - A modular converter | 11-05-2009 |
20110075454 | POWER SUPPLY - A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform with substantially no ripple. The power supply may comprise a waveform generator, a level conversion stage for step up or down conversion, a rectification stage, and a combiner. The waveform generator may generate complementary waveforms, preferably identical but phase offset from each other, such that after the complementary waveforms are level-converted, rectified and additively combined their sum will be constant, thus requiring no or minimal smoothing for generation of a DC output waveform. The level conversion may be carried out using transformers or switched capacitor circuits. Feedback from the DC output waveform may be used to adjust the characteristics of the input waveforms. | 03-31-2011 |
20120195081 | SYSTEM AND METHOD FOR INCREASING DC POWER SYSTEM EFFICIENCY WITHOUT REQUIRING A LARGE BATTERY RESERVE - A system for increasing parallel rectifier DC power system efficiency. In one embodiment, the system includes: (1) a controller configured to sense and classify a load magnitude change into groups including large load transients and moderate load transients and (2) at least one rectifier coupled to the controller and configured to transition from a stand-by mode to an active mode upon an occurrence of one of a large load transient and a moderate load transient. | 08-02-2012 |
20120250377 | VOLTAGE ADJUSTING CIRCUIT AND CONTACTLESS CARD AND CONTACTLESS CARD SYSTEM WHICH INCLUDE THE SAME - A voltage adjusting circuit includes an inducing circuit configured to induce a voltage from electromagnetic waves, a first rectifying circuit configured to rectify an output signal of the inducing circuit, a second rectifying circuit configured to rectify the output signal of the inducing circuit, a first regulator configured to regulate an output signal of the first rectifying circuit, and a second regulator configured to regulate an output signal of the second rectifying circuit. | 10-04-2012 |
20130121045 | POWER CONVERSION APPARATUS - An inverter circuit is connected in series to an AC power supply, and at the subsequent stage, a smoothing capacitor is connected via a converter circuit including semiconductor switching devices. A control circuit controls the converter circuit by providing a short-circuit period for bypassing the smoothing capacitor in each cycle, and controls the inverter circuit to improve the power factor of the AC power supply by using a current instruction such that the voltage of the smoothing capacitor becomes a target voltage. When the voltage of a DC voltage source of the inverter circuit has exceeded a predetermined upper limit, the control circuit increases the current instruction to control the inverter circuit, thereby increasing the discharge amount of the DC voltage source. Thus, even if the voltage variation of the DC voltage source of the inverter circuit increases, it is possible to stably continue the control. | 05-16-2013 |
20130163298 | ELECTROMAGNETIC DEVICE FOR GENERATING ELECTRICAL CURRENT AND METHODS THEREOF - An energy harvesting device (EHD) and method including a hollow outer envelope ( | 06-27-2013 |
20130208519 | 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 - 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. | 08-15-2013 |
20130343106 | RF Energy Recovery System - An energy recovery system is provided that can be used in place of a resistive termination. The energy recovery system can simulate the behavior and performance of a resistive termination, while recovering at least some of the energy that would otherwise have been dissipated within the termination. In one embodiment, the energy recovery system includes a rectification system having a plurality of tuned rectifier circuits and an RF input network to provide input power distribution to the plurality of tuned rectifier circuits and input impedance shaping to shape the collective input impedance of the plurality of tuned rectifier circuits as seen at the RF input port of the RF input network. | 12-26-2013 |
20130343107 | Transmission-Line Resistance Compression Networks And Related Techniques - A resistance compression network uses transmission line sections having asymmetric lengths to compress the resistance range of multiple loads. In some embodiments, the characteristic impedance of the transmission line sections is related to the geometric mean of the load resistance range. The resistance compression network may be used within, for example, an energy recovery system or in any other application where a reduction in the resistance range of multiple loads is desired. | 12-26-2013 |
20140029319 | RECTIFIER MODULE FOR POWER CONVERSION CIRCUITS - A rectifier module comprises a conductive housing made of injection molded aluminum or aluminum alloy. Diodes are inserted into recesses formed in the housing. The housing is placed at an alternating input potential during operation, and transmits alternating current input power to the diode modules for conversion to direct current power. Multiple recesses may be provided for high and low side diodes, of which there may be one or many. Multiple such modules may be provided for converting multiple phases of input power to direct current power. | 01-30-2014 |
20140286062 | RECTIFYING MODULE, ELECTRICAL APPARATUS THEREOF, AND RECTIFYING METHOD THEREOF - An exemplary embodiment of the present disclosure illustrates a rectifying module, which is operable for rectifying an alternating current (AC) signal into a direct current (DC) signal. The rectifying module includes a transmission line, at least one rectifying unit, and at least one pattern. The transmission line is configured for receiving and transmitting the alternating current signal. The rectifying unit is arranged neighboring to the transmission line for operatively coupling with the transmission line to receive a part of the alternating current signal and rectifies the alternating current signal into the DC signal. The pattern is configured to be a hollow grounding structure and the pattern is disposed under the dual-line coupling areas of the rectifying unit neighboring to the transmission line. | 09-25-2014 |
20150295509 | METHOD AND ASSOCIATED TRANSMISSION SYSTEM - It is presented a method executed in a transmission system, the transmission system comprising an AC grid, a DC grid and at least two AC/DC converters connected between the AC grid and DC grid. The method comprises the steps of: obtaining set points for each one of the at least two AC/DC converters, each set point comprising a magnitude and direction of power through the respective AC/DC converter during normal operation generating, based on the set points, a virtual AC grid, the virtual AC grid corresponding to AC behaviour of the DC grid, as viewed from each AC side of the at least two AC/DC converters; and controlling the at least two AC/DC converters to mimic a behaviour in accordance with the virtual AC grid. A corresponding transmission system is also presented. | 10-15-2015 |
20160006363 | CHOPPED ELECTRICAL ENERGY CONVERTER - A chopped current input electrical energy converter includes at least one conversion module (K | 01-07-2016 |
20160049883 | Power-Balancing Circuits for Stacked Topologies - In one aspect, a method is described. The method may include operating a plurality of circuit elements, and operating a plurality of magnetically-coupled power-balancing circuits. Each individual power-balancing circuit may be electrically coupled in parallel to a respective circuit element and each individual power-balancing circuit may include a first switch and a second switch (or perhaps more than two switches). The method may include designating one power-balancing circuit of the plurality of power-balancing circuits as a primary power-balancing circuit, and alternately toggling the first switch and the second switch of the primary power-balancing circuit in accordance with a first duty cycle. | 02-18-2016 |
20160094119 | SYNCHRONIZING CIRCUITRY FOR AC-DC SWITCH MODE POWER SUPPLIES - A synchronizing circuitry for AC-DC switch mode power supplies includes a master control circuit connected to one or more slave control circuits through one or more communication interfaces. With the communication interfaces, the master control circuit and the slave control circuits can be connected using existing communication loops, so that when the master control circuit performs master-slave control on the slave control circuits, the slave control circuits have synchronous connection with the master control circuit, thereby mitigating electromagnetic interference that may happen during master-slave control, and effectively reducing noise. As a result, signal transmission is more efficient and master-slave control is more responsive. | 03-31-2016 |
363068000 | In series (e.g., series SCR's, bridge circuits, etc.) | 13 |
20080247200 | Control Method for Direct-Current Transmission by Means of a Plurality of Converters - At least three power converters in a power distribution and power transmission system can be controlled as rectifiers or inverters and are connected together by a direct current network. A measuring direct current voltage and a measuring direct current are measured on each power converter and respectively, transmitted to the respective rectifier control and/or inverter control, and a rectifier desired direct power and/or inverter desired direct power is determined for each power converter. The total of all desired direct powers is equal to zero, and a desired direct voltage is determined from each desired direct power, the smallest inverter desired direct voltage of all connected inverters is fixed as minimal direct voltage by means of a minimal direct voltage and the desired direct voltage, a desired direct current is formed from the minimal voltage and the measuring direct voltage, a differential direct voltage is formed from the minimal voltage and the differential direct current is formed from the desired direct current and the measuring direct current. The respective rectifier control of the rectifier is controlled to minimize the total of the differential direct voltage and the differential direct current, and the inverter control of the inverter is controlled to minimize the difference between the differential direct current and the differential direct voltage. | 10-09-2008 |
20090116268 | POWER CONVERTING APPARATUS - A converter controllable in regenerative running mode, which is a power converting apparatus capable of suppressing harmonics without increasing the size of a reactor, and reducing power loss and electromagnetic noise. A power converter is configured by directly connecting AC sides of single-phase sub-converters having a DC voltage lower than a DC voltage of a 3-phase main converter to AC input lines of individual phases thereof in series. The main converter is driven by one gate pulse per half recurring cycle and a voltage produced by each sub-converter at AC terminals thereof is controlled to match a difference between an AC power supply voltage and a voltage produced by the main converter at AC terminals thereof, whereby phase voltages of the power converter are generated as the sums of phase voltages of the individual converters. | 05-07-2009 |
20090168473 | CONVERTER STATION - A converter station for connecting an AC system to an HVDC transmission line. At least two converters are arranged in two separate converter valve halls. The station includes a separate control device configured to control of each converter and an auxiliary power source configured to provide auxiliary power for each converter. A separate overall control configured to control the overall operation conditions is arranged for each converter making each converter self supporting. The converter valve halls are separated by a substantial space. | 07-02-2009 |
20100020578 | ADAPTER POWER SUPPLY - An advantage of the present invention is to provide an adapter power supply which varies a link voltage of DC power serving an input power of a DC/DC converter according to variation of a load current estimated by measuring a secondary current using a lossless current measurement technique at a primary terminal of a transformer of the DC/DC converter and thus presuming a load current of an output power. | 01-28-2010 |
20120206946 | ON/OFF MODULATION OF A VERY HIGH FREQUENCY SWITCHING CELLBASED POWER CONVERTER - A method of on/off modulation of a very high frequency switching cell-based power converter includes receiving an input voltage signal to be applied to a plurality of series stacked very high frequency power converter cells for producing an output voltage and/or current, and controlling a portion of the plurality of series stacked high frequency power converter cells through on/off modulation of at least one of the plurality of series stacked high frequency power converter cells to control the output current and/or the output voltage. | 08-16-2012 |
20130070493 | VOLTAGE RECTIFIER WITH SPECIFIC DIODE ARRANGEMENT - The invention is directed to a voltage rectifier ( | 03-21-2013 |
20130148392 | Power Conversion Device - 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. | 06-13-2013 |
20130223115 | Power Conversion Device - A power conversion device includes: a plurality of cascade-connection type single-phase power converters; and a central control unit that controls the plurality of the single-phase power converters, wherein each of the plurality of single-phase power converters has a single-phase power converter control unit, and the central control unit and the plurality of the single-phase power converter control units are connected via a communication means having a daisy-chain configuration, wherein the single-phase power converter control unit transmits and receives a control signal via the communication means having the daisy-chain configuration, as well as a specific pattern signal, other than a control signal frame, which can be distinguished from the control signal frame, and determines a communication error due to not receiving the specific pattern signal at the single-phase power converter control unit, or an inconsistency between the received signal and the specific pattern signal. | 08-29-2013 |
20140078796 | Power Conversion Apparatus and Control Method Thereof - In the present invention, provided is a power conversion apparatus in which at least one energy storage element and at least one switching element are included, a plurality of series circuits of a transformer winding and an arm in which one or a plurality of at least two-terminal unit converters which depend on ON/OFF of the switching element and supply a zero voltage or a voltage depending on a voltage of the energy storage element are connected in series are connected in parallel, and a multi-phase power source or a multi-phase load is connected to another winding of the transformer, and the parallel-connection point is set as a DC terminal, and which includes means for controlling a current flowing through each of the arms to have a phase and amplitude different from each other. | 03-20-2014 |
20140340950 | Composite AC-to-DC Power Converter with Boosting Capabilities Using T Configuration - A boosting AC-to-DC converter An AC-to-DC converter may include a main rectifier, a first auxiliary rectifier, a second auxiliary rectifiers and a transformer assembly. The transformer assembly may include a set of primary windings arranged in a first multiphase configuration and connected to the main rectifier, a first set of secondary windings arranged in a second multiphase relationship and connected to the first auxiliary rectifier and a second set of secondary windings arranged in a third multiphase configuration and connected to the second auxiliary rectifier. The second multiphase configuration of the first set of secondary windings and the third multiphase configuration of the second set of secondary windings may be in phase shifting relationships relative to the first multiphase configuration of the set of primary windings. | 11-20-2014 |
20140369096 | POWER CONVERSION APPARATUS - A power conversion apparatus including a three-phase transformer interconnected to a three-phase power system, the three-phase transformer including a primary winding group that receives three-phase electric power of the three-phase electric power system, a first secondary winding group and a second secondary winding group that receive electric power transferred from the primary winding group, and a first converter group and a second converter group connected to the first and second secondary winding groups, respectively, the power conversion apparatus further including a DC output terminal group connected to at least one of other ends of the first to third converter arms provided in the first converter group, and connected to at least one of other ends of the fourth to sixth converter arms provided in the second converter group. | 12-18-2014 |
20160056727 | POWER CONVERSION DEVICE - A power conversion device includes: a DC current calculation unit for calculating a circulating current component for each phase which circulates between the phases through first arms and/or second arms not via an AC power supply and a DC power supply; and a circulating current control unit for controlling the circulating current component for each phase so as to follow a predetermined circulating current command value, thereby reliably suppressing variation in voltages of DC capacitors of unit cells among the phases even in such a case where an impedance is additionally inserted in a DC circuit. | 02-25-2016 |
20160181943 | SUB-SEA POWER SUPPLY AND METHOD OF USE | 06-23-2016 |
363069000 | In parallel | 20 |
20090073730 | AC-DC Power Converter - An AC-DC power converter is composed of AC input, a first rectifying circuit, a second rectifying circuit, a DC-DC converter and a DC output. The DC-DC converter has a DC input. The first rectifying circuit and the second rectifying circuit are connected in parallel between the AC input and the DC input of the DC-DC converter. At least one of the rectifying circuits comprises a phase shifting element that provides a phase shift at the AC line frequency. | 03-19-2009 |
20090109714 | POWER SUPPLY MODULE ADAPTED TO POWER A CONTROL CIRCUIT OF A SWITCHING MODE POWER SUPPLY - A power supply module to power the control circuit of a switching mode power supply is provided. Based on the determination of whether the switching mode power supply is under a light or open load condition, the power supply module can dynamically provide the power to the control circuit of the switching mode power supply. Therefore, the performance of the power supply can be increased and the power loss can be decreased when the switching mode power supply is under a light or open load. | 04-30-2009 |
20100067267 | CONTROLLER AND METHOD FOR CONTROLLING CONVERTERS OF DISPARATE TYPE - A converter controller and a method of controlling converters. In one embodiment, the converter controller includes: (1) a converter efficiency database configured to store data pertaining to efficiencies of converters, (2) a power requirement assessor configured to compare ratings of online ones of the converters to an output power requirement of a given output power bus and (3) a controller mode selector coupled to the power requirement assessor and configured to retrieve online and standby converter efficiencies from the converter efficiency database, assess efficiencies of alternative converter combinations appropriate for the output power requirement and place one of the alternative converter combinations online. | 03-18-2010 |
20110141777 | DIRECT CONVERTING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND CONTROL SIGNAL GENERATION DEVICE - In a direct converting apparatus including a converter and a plurality of inverters, substantial carrier frequencies of the plurality of inverters are made different from each other while performing an operation in synchronization with the converter. An original carrier has a carrier frequency twice as high as a carrier frequency of a first carrier used for controlling one of the inverters. A waveform of the original carrier is magnified twice with a value serving as the center thereof, so that a second carrier used for controlling the other of the inverters is obtained. | 06-16-2011 |
20120026764 | CONTROL SYSTEM FOR HIGH-EFFICIENCY OPERATION IN PARALLEL INVERTER INSTALLATIONS - A control system for parallel connected inverter legs energized by a power source and configured for servicing a load is disclosed. The invention facilitates the number of running inverter legs to adaptively react to changes in the load by dynamically switching various inverter legs “on” or “off” in response to variations in load demand, while continuing magnetization of an output transformer connected with an “off” inverter leg via a back-feed from another output transformer of an “on” inverter leg, greatly improving the dynamic response to load changes. This design enables a fast reaction to load changes with “off” inverter legs transitioning to on-line operation instantaneously. | 02-02-2012 |
20120155131 | Control Methods for the Synchronisation of Parallel-Connected Power Converters Operating in Accordance with a Pulse Width Modulation (PWM) Strategy - A method is described for controlling a plurality of parallel-connected power converters | 06-21-2012 |
20120176823 | POWER CONVERTER WITH AUTOMATIC MODE SWITCHING - A power converter is provided that has an alternating-current (AC) to direct-current (DC) switched-mode power converter circuit that converts alternating-current power into direct-current power for powering an attached electronic device. Power can be conserved by automatically placing the power converter circuit in a low-power standby mode of operation whenever the electronic device is detached from the power converter. A monitoring circuit can be powered by a capacitor or other energy storage element while the power converter is operating in the standby mode. If the monitoring circuit detects an output voltage change that is indicative of attachment of the electronic device or if the storage element needs to be replenished, the monitoring circuit can place the power converter circuit in an active mode of operation. | 07-12-2012 |
20120243274 | Control Methods for Parallel-Connected Power Converters - A method is described for controlling a plurality of power converters | 09-27-2012 |
20130215654 | THREE-PHASE AC-DC CONVERTER CIRCUIT AND CONVERSION METHOD AND CONTROL SYSTEM THEREOF - The embodiment of present invention provides a three-phase AC (Alternating Current)-DC (Direct Current) converter circuit, conversion method and the control system thereof. The converter circuit includes a three-phase AC power source having a first output terminal, a second output terminal and a third output terminal; a first AC-DC conversion module, a second AC-DC conversion module and a third AC-DC conversion module electrically connected to the first output terminal, the second output terminal and the third output terminal of the three-phase AC power respectively, and respectively have N | 08-22-2013 |
20140254218 | Voltage Adaptor for AC-DC Power Supply Modules - A circuit for connecting lower AC voltage-rated AC-DC power supplies with higher voltage power sources. A power line matching transformer connecting the source to the power supplies needs only to support the self-dissipation and output current mismatch between supplies. The circuit can also protect the line matching transformer from overheating in various fault scenarios. | 09-11-2014 |
20140268947 | Reducing Phase Current Imbalances In Single Phase Redundant Power Supply Systems With Unbalanced Loads - A system includes first and second pluralities of single phase AC/DC power supplies each having an input for coupling to first and second phase voltages, respectively, in a polyphase power distribution system. The outputs of the power supplies are electrically connected in parallel for supplying DC current to a load at a substantially constant voltage. The system further includes a controller coupled to at least the first plurality of power supplies and configured to increase the DC current supplied to the load by at least one of the first plurality of power supplies in response to another one of the first plurality of power supplies shutting down. Various other systems, power supplies, controllers and methods are also disclosed. | 09-18-2014 |
20150078046 | HIGH VOLTAGE DC POWER CONVERSION SYSTEM AND METHOD OF OPERATING THE SAME - A fraction rated conversion system for coupling a plurality of high voltage direct current (HVDC) power strings in parallel to an HVDC transmission system includes at least one fraction rated power converter coupled to the plurality of HVDC power strings and at least one capacitive device coupled to the at least one fraction rated power converter. The at least one fraction rated power converter and the at least one capacitive device regulate a differential voltage across each HVDC power string of the plurality of HVDC power strings to be substantially similar to each other. | 03-19-2015 |
20160020705 | MULTI-LEVEL POWER CONVERTER - A power converter including one or more converter legs is provided. Each converter leg includes a first string including a plurality of switches coupled to each other in series. The one or more converter legs also include a second string operatively coupled to the first string at a first node and a second node in a parallel configuration, where the second string includes a plurality of switching units, and where a second string of one converter leg of the one or more converter legs is operatively coupled to second strings corresponding to other converter legs in the one or more converter legs. | 01-21-2016 |
363070000 | Including semiconductor device | 7 |
20080205101 | Multi-Pulse Rectifier for AC Drive Systems Having Separate DC Bus Per Output Phase - An 18n-pulse rectifier for AC drive systems having a separate DC bus for each output phase is described, where n=any positive integer. The rectifier uses three separate phase rectifiers, one for each output phase of a transformer, each comprised of n six-pulse diode bridges connected in series or parallel. Each phase rectifier may be supplied with n unique sets of phase inputs from a transformer secondary winding. In some configurations, the n sets of inputs provided to each rectifier are separated by 60/n degrees of phase (when n is greater than 1), while the corresponding inputs to neighboring rectifiers are separated by 20/n degrees of phase. In a 36-pulse example, the phase offsets for the inputs provided to the rectifiers may be −25° and +5° from the transformer primary winding (for the first rectifier), −15° and +15° from the primary winding (for the second rectifier) and −5° and +25° from the primary winding (for the third rectifier). Each set of inputs may include three lines of in-phase current, and may be coupled to one of the six-pulse diode bridges. | 08-28-2008 |
20090040799 | Universal Energy Supply System - A universal energy supply system for at least one electrical consumer comprises at least one AC voltage source and a cable connection connecting the source with the electrical consumer, wherein an AC/DC converting means is assigned to the AC voltage source for converting the AC voltage into DC voltage which DC voltage can be supplied to the electrical consumer via the cable connection. To improve such a universal energy supply system in that with small constructional efforts and with low costs, the energy supply to an electrical consumer is guaranteed also over great distances and the corresponding voltage supply is stabilized, the efficiency being relatively high at the same time and the system being redundant, the AC/DC conversion means comprises a number of AC/DC converting units which are connected in parallel with the AC voltage source on the input side and are serially connected to the electric consumer on the output side, each converting unit being constructed as a blocked switch mode power supply. | 02-12-2009 |
20110242861 | ELECTRONIC DEVICE AND SEMICONDUCTOR DEVICE - The present invention provides a method of improving efficiency in a full load region in a PFC power source of an active filter method by controlling a switch circuit of the PFC power source in association with an output power of the PFC power source. A pair of two switches controlling charging/discharging an inductor is provided. A MOSFET switch having a small current capacity is used as one of the switches, and an IGBT switch of a large current capacity is used as the other switch. When an output of a voltage dividing circuit for dividing voltage of an output terminal of the PFC power source is smaller than a threshold voltage, only the MOSFET switch is operated. When the output exceeds a threshold voltage, the IGBT switch is also operated. | 10-06-2011 |
20130088899 | MULTI-PHASE CONVERTER - A multi-phase converter of one of the embodiments includes: a plurality of AC/DC converters which are connected in parallel to each other, wherein each of the plurality of AC/DC converters includes a power factor correction circuit and a DC/DC converter that is connected in series to the power factor correction circuit and that receives an output from the power factor correction circuit, and the power factor correction circuit includes an output voltage adjusting circuit that adjusts an output voltage from the power factor correction circuit. | 04-11-2013 |
20130301320 | COMPACT HIGH-POWER DIODE/THYRISTOR RECTIFIER ARCHITECTURE - A Graëtz-bridge converter-rectifier in which at least one rectifier arm situated between a single AC terminal and a single DC terminal includes multiple unidirectional electronic components connected in parallel and connected on one side to the DC terminal by means of a conductive component set and on the other side to the AC terminal. The invention is characterized in that the component set for at least one rectifier arm includes a plurality of separate component busbars each having at least one end connected to the DC terminal, the unidirectional components being divided between the component busbars into as many component sets connected in parallel as there are component busbars. | 11-14-2013 |
20140063877 | POWER CONVERSION APPARATUS - A power conversion apparatus according to the present invention includes a plurality of PWM converters ( | 03-06-2014 |
20140119074 | OPERATION OF MULTICHANNEL ACTIVE RECTIFIER - An active rectifier system that rectifies power supplied to an electrical device includes a load detector to determine an electrical load applied on the active rectifier system by the electrical device. A plurality of active rectifier modules are configured to convert an input alternating current (AC) power into an output direct current (DC) power. Each active rectifier module is operable according to a respective switching signal. A control module is configured to selectively output the switching signal to at least one selected active rectifier module among the plurality of active rectifier modules based on the electrical load. | 05-01-2014 |