US20070159279A1 - Alternating-current power supply device recovering magnetic energy - Google Patents

Alternating-current power supply device recovering magnetic energy Download PDF

Info

Publication number
US20070159279A1
US20070159279A1 US11/579,940 US57994006A US2007159279A1 US 20070159279 A1 US20070159279 A1 US 20070159279A1 US 57994006 A US57994006 A US 57994006A US 2007159279 A1 US2007159279 A1 US 2007159279A1
Authority
US
United States
Prior art keywords
current
alternating
reverse conducting
magnetic energy
semiconductor switches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/579,940
Other languages
English (en)
Inventor
Ryuichi Shimada
Hideo Sumitani
Taku Takaku
Takanori Isobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merstech Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to CIRCLE FOR THE PROMOTION OF SCIENCE AND ENGINEERING, THE reassignment CIRCLE FOR THE PROMOTION OF SCIENCE AND ENGINEERING, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISOBE, TAKANORI, SHIMADA, RYUICHI, SUMITANI, HIDEO, TAKAKU, TAKU
Assigned to MERSTECH INC. reassignment MERSTECH INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: THE CIRCLE FOR THE PROMOTION OF SCIENCE AND ENGINEERING
Publication of US20070159279A1 publication Critical patent/US20070159279A1/en
Priority to US12/490,253 priority Critical patent/US7843166B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/16—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using ac to ac converters without intermediate conversion to dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/1555—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only for the generation of a regulated current to a load whose impedance is substantially inductive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Definitions

  • the present invention relates to an alternating-current power supply device that can improve a power factor of alternating-current load. More specifically, the invention relates to the alternating-current power supply device where a bi-directional magnetic energy recovery switch is inserted in series with the alternating-current load so as to function as a phase advancing capacitor instead of a conventional phase advancing capacitor and low-cost and miniaturization are realized.
  • the improvement of the power factor by inserting the phase advancing capacitor in series is not suitable for the case where the power factor of the load changes according to an operating state or a circuit where a frequency of power source greatly changes.
  • the power factor of the load changes at the time from the start-up to the stationary operation like induction motors.
  • an inverter-converter set of AC-DC-AC link using a semiconductor switch is used, and thus a frequency and a voltage are reduced at the time of start-up and the number of revolution is controlled at the time of operation.
  • harmonics distortion occurs due to PWM control and a large electrolytic capacitor is necessary for maintaining a DC voltage, the entire size becomes large.
  • Such a conventional method of improving the power factor has a limitation, and thus an alternating-current power supply device which has a power factor improving circuit instead of using the phase advancing capacitor and realizes low cost and miniaturization is requested.
  • the present invention is devised in order to solve the above problems, and its object is to provide an alternating-current power supply device which can improve a power factor of an alternating-current load and realizes low cost and miniaturization.
  • the inventors of this application give attention to that magnetic energy remaining in a circuit in the case where a load current is cut off is absorbed by the capacitor, the energy is recovered to the load at next ON time and the current is quickly raised so that the power factor can be improved. That is to say, the magnetic energy is absorbed by the capacitor so as to be stopped at the time of cutting off the current and the magnetic energy is recovered to the load at next ON time so that the current quickly rises. For this reason, the applied current increases, and thus the higher current can be applied to the load by a lower voltage, so that the power factor of the power source is improved in the general meaning.
  • a bi-directional magnetic energy recovery switch is, therefore, used in an alternating-current circuit so as to cut off the current at arbitrary timing, the magnetic energy is absorbed by a capacitor and the current is recovered to the load in an opposite direction at the arbitrary timing.
  • alternating-current phase can be forcibly controlled.
  • the bi-directional magnetic energy recovery switch is a loss-free current switch which stores the magnetic energy remaining in the circuit in the case of cutting off the load current into the capacitor, and recovers the energy to the load at next ON time so as to quickly raise the current.
  • a patent application about this switch has been already filed by the applicants of this application (Japanese Patent Application Laid-Open No. 2000-358359).
  • the present invention relates to an alternating-current power supply device which can improve the power factor of the alternating-current load, and an object of the present invention is to provide the alternating-current power supply device which supplies the alternating current to an induction load and recovers the magnetic energy at the time of cutting off the current so as to utilizes it as an current to be supplied to the induction load.
  • the alternating-current power supply device comprises: a bridge circuit composed of four reverse conducting semiconductor switches; a capacitor that is connected between direct-current terminals of the bridge circuit and stores the magnetic energy at the time of cutting off the current; an alternating-current voltage source that is connected to the induction load in series and is inserted between alternating-current terminals of the bridge circuit; and a control circuit that gives a control signal to gates of the respective reverse conducting semiconductor switches and controls on/off states of the respective reverse conducting semiconductor switches.
  • the control circuit simultaneously controls the on/off operation of the paired reverse conducting semiconductor switches positioned on a diagonal line of the four reverse conducting semiconductor switches composing the bridge circuit, makes a control so that when one pair of the two pairs is ON, the other pair is OFF, and switches the control signal in synchronization with a voltage of the alternating-current voltage source.
  • FIG. 1 is a diagram illustrating an alternating-current power supply device according to an embodiment of the present invention
  • FIG. 2 is a diagram illustrating a simulation result of a current-voltage waveform of the alternating-current power supply device according to the present invention
  • FIG. 3 is a diagram illustrating an application example of the alternating-current power supply device to an induction motor according to the present invention
  • FIG. 4 is a diagram illustrating comparison of an actual measurement value wherein the alternating-current power supply device according to the present invention is connected (with switch) with that wherein it is not connected (without switch) with respect to a starting current of the induction motor and a starting torque of it;
  • FIG. 5 is a diagram for explaining operation principle of a bi-directional magnetic energy recovery switch in the alternating current.
  • a pulse current generating function of a bi-directional magnetic energy recovery switch inserted between an alternating-current voltage source and an induction load is used for an ON/OFF operation at timing in synchronization with the voltage source, so that a phase of the alternating current can be controlled.
  • FIG. 1 is a diagram illustrating a basic constitution of an alternating-current power supply device 10 according to the present invention.
  • a bi-directional magnetic energy recovery switch 30 (which is constituted by bridge-connecting four reverse conducting semiconductor switches 31 ) is inserted between an alternating-current voltage source 20 and an induction load 50 having an inductance, and a controller 40 controls respective gates (G1 to G4) of power MOSFET31 (one example of the reverse conducting semiconductor switches) using a signal which synchronizes with the voltage of the alternating-current voltage source 20 so that the current is turned ON/OFF.
  • the bi-directional magnetic energy recovery switch 30 contains a capacitor 32 for storing magnetic energy at the time of cutting off the current, the current which is the same as that at the time of cutting-off can be recovered by discharging by the capacitor 32 at next ON time.
  • a pulse type voltage is applied to the induction load 50 at the time of ON/OFF of the current, but the level of the voltage can be set within a withstand voltage of power MOSFET31 and the induction load 50 by selecting electrostatic capacity of the capacitor 32 .
  • a direct-current capacitor can be used differently from conventional series capacitors for improving a power factor.
  • the controller 40 controls the four gates of power MOSFET31, but a pair of the opposed gates, namely, the pair (G1 and G2) of a forward direction current or the pair (G3 and G4) in a reverse direction may be brought into ON/OFF state according to a direction to which the current is applied. It is, however, necessary to take care that the pair in the forward direction current and the pair in the reverse direction are not simultaneously brought into the ON state while the capacitor 32 has voltage.
  • the gate control is made in synchronization with the voltage of the alternating-current voltage source 20 , but in the example of the case where, for example, the power factor of the current is improved, the gates (G1 and G2) in the forward direction are brought into the ON state while the voltage is positive, and the gates (G3 and G4) in the reverse direction are brought into the ON state while the voltage is negative. As a result, the current whose direction is the completely the same as the voltage is applied. And the switch lets the capacitor 32 charge the magnetic energy at the time of cutting-off the current and discharge the energy to the opposite direction, so that the current is quickly allowed to rise and the current supplied to the load is increased.
  • a relationship between the voltage of the alternating-current voltage source 20 and the states of the gates are as shown in the following table 1. TABLE 1 AC voltage source Gate positive negative G1, G2 ON OFF G3, G4 OFF ON
  • the magnetic energy remaining in the circuit when the load current is cut off is absorbed by the capacitor, and the energy is recovered to the load at next ON time so that the current is quickly raised. As a result, the power factor can be improved.
  • FIG. 2 is a diagram illustrating an operating simulation result of the alternating-current power supply device according to the present invention.
  • the bi-directional magnetic energy recovery switch 30 it is found that the phase of the current is the same as that of the voltage and thus the current increases. This means nothing else that the power factor of the load is improved, and thus this device functions as one for improving power factor in the general meaning.
  • the phase of the gate signal When the phase of the gate signal is further advanced, the current whose phase advances flows, and when the phase of the gate signal is delayed, the current can be reduced.
  • the phase of the gate signal is delayed by 1800, the current is stopped.
  • the phase of the current can be forcibly synchronized with the phase of the power voltage source. For this reason, the power factor of the current can be improved, and thus the alternating-current power supply device whose size is smaller and whose cost is lower than conventional devices adopting the DC link system can be realized.
  • FIG. 3 is a diagram illustrating an experimental circuit for actually measuring the starting torque
  • FIG. 4 is a graph where the actual measurement value of the starting torque is compared with the starting torque in the case where the conventional alternating-current power supply is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Electrical Variables (AREA)
  • Ac-Ac Conversion (AREA)
US11/579,940 2004-05-12 2004-05-12 Alternating-current power supply device recovering magnetic energy Abandoned US20070159279A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/490,253 US7843166B2 (en) 2004-05-12 2009-06-23 Alternating-current power supply device recovering magnetic energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/006674 WO2005109619A1 (ja) 2004-05-12 2004-05-12 磁気エネルギーを回生する交流電源装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/490,253 Continuation US7843166B2 (en) 2004-05-12 2009-06-23 Alternating-current power supply device recovering magnetic energy

Publications (1)

Publication Number Publication Date
US20070159279A1 true US20070159279A1 (en) 2007-07-12

Family

ID=35320515

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/579,940 Abandoned US20070159279A1 (en) 2004-05-12 2004-05-12 Alternating-current power supply device recovering magnetic energy
US12/490,253 Expired - Fee Related US7843166B2 (en) 2004-05-12 2009-06-23 Alternating-current power supply device recovering magnetic energy

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/490,253 Expired - Fee Related US7843166B2 (en) 2004-05-12 2009-06-23 Alternating-current power supply device recovering magnetic energy

Country Status (4)

Country Link
US (2) US20070159279A1 (zh)
EP (2) EP1768242A4 (zh)
CN (1) CN1954482A (zh)
WO (1) WO2005109619A1 (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110121774A1 (en) * 2008-05-15 2011-05-26 Merstech Inc. Alternating voltage control apparatus
US20110176343A1 (en) * 2008-09-26 2011-07-21 Merstech, Inc. Power converting apparatus
US20110215651A1 (en) * 2008-12-12 2011-09-08 Mitsubishi Electric Corporation Power conversion apparatus
US20120019188A1 (en) * 2009-03-30 2012-01-26 Kazuhiko Fukutani Induction motor control device and induction motor group control system
US20120037616A1 (en) * 2008-10-27 2012-02-16 Merstech Inc. Power inverter
US20120218798A1 (en) * 2009-10-28 2012-08-30 Merstech, Inc. Power conversion device
US20130121045A1 (en) * 2010-05-28 2013-05-16 Mitsubishi Electric Corporation Power conversion apparatus
CN114123938A (zh) * 2021-10-29 2022-03-01 浙江捷昌线性驱动科技股份有限公司 可调控驱动控制电路

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112008003666B4 (de) * 2008-02-20 2012-06-14 Merstech Inc. Magnetenergie-Wiederherstellschalter mit Schutzschaltung
US20110109239A1 (en) * 2008-07-03 2011-05-12 MERSTech, Inc Illumination control device
FR2951836B1 (fr) * 2009-10-22 2015-10-30 Inst Nat Sciences Appliq Dispositif de correction du facteur de puissance
WO2013035671A1 (ja) * 2011-09-05 2013-03-14 株式会社ＭＥＲＳＴｅｃｈ 電力変換装置、制御方法、及び、プログラム
US10700597B1 (en) 2012-12-21 2020-06-30 Gridbridge, Inc. Distribution transformer power flow controller
US10116204B1 (en) 2012-12-21 2018-10-30 Gridbridge, Inc. Distribution transformer interface apparatus and methods
JP5800923B2 (ja) * 2014-01-15 2015-10-28 ファナック株式会社 ワイヤ放電加工機の加工用電源装置
CN103825435A (zh) * 2014-02-28 2014-05-28 深圳市汇川技术股份有限公司 双向可控的高频开关电路
JP6398873B2 (ja) * 2015-05-28 2018-10-03 新東工業株式会社 動特性試験装置及び動特性試験方法
US10097010B2 (en) * 2016-04-19 2018-10-09 Infineon Technologies Ag Control of freewheeling voltage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6548985B1 (en) * 2002-03-22 2003-04-15 General Motors Corporation Multiple input single-stage inductive charger

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01217887A (ja) 1988-02-23 1989-08-31 Toshiba Electric Equip Corp 放電灯点灯装置
JP3280395B2 (ja) 1991-05-15 2002-05-13 松下電工株式会社 放電灯点灯装置
JP3477986B2 (ja) * 1995-05-11 2003-12-10 富士電機ホールディングス株式会社 三相交流電力調整装置
EP0752748B1 (en) * 1995-06-07 1999-03-31 STMicroelectronics S.r.l. Multiple function battery charger, self-configuring as supply voltage regulator for battery powered apparatuses
JPH11500861A (ja) * 1995-12-08 1999-01-19 フィリップス、エレクトロニクス、ネムローゼ、フェンノートシャップ バラスト・システム
JP3373994B2 (ja) * 1996-02-14 2003-02-04 三菱電機株式会社 単相モータの制御装置並びに該単相モータの制御装置を用いたアクチュエータ
WO1997042695A1 (en) * 1996-05-03 1997-11-13 Auckland Uniservices Limited Inductively powered battery charger
JP3761010B2 (ja) * 1996-10-25 2006-03-29 富士電機ホールディングス株式会社 交流電力調整装置
US6049188A (en) 1996-11-07 2000-04-11 Smith; Otto J. M. Single-phase motor starters
US5933338A (en) * 1997-10-14 1999-08-03 Peco Ii, Inc. Dual coupled current doubler rectification circuit
JP3634982B2 (ja) 1999-06-11 2005-03-30 財団法人理工学振興会 スナバーエネルギーを回生する電流順逆両方向スイッチ
US6160374A (en) * 1999-08-02 2000-12-12 General Motors Corporation Power-factor-corrected single-stage inductive charger
US6384579B2 (en) * 2000-06-27 2002-05-07 Origin Electric Company, Limited Capacitor charging method and charging apparatus
KR100566220B1 (ko) * 2001-01-05 2006-03-29 삼성전자주식회사 무접점 배터리 충전기
US6844702B2 (en) * 2002-05-16 2005-01-18 Koninklijke Philips Electronics N.V. System, method and apparatus for contact-less battery charging with dynamic control
TW591870B (en) * 2003-02-18 2004-06-11 Delta Electronics Inc Integrated converter with three-phase power factor correction
US7135836B2 (en) * 2003-03-28 2006-11-14 Power Designers, Llc Modular and reconfigurable rapid battery charger

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6548985B1 (en) * 2002-03-22 2003-04-15 General Motors Corporation Multiple input single-stage inductive charger

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8384333B2 (en) * 2008-05-15 2013-02-26 Merstech, Inc. Alternating voltage control apparatus
US20110121774A1 (en) * 2008-05-15 2011-05-26 Merstech Inc. Alternating voltage control apparatus
US8482945B2 (en) * 2008-09-26 2013-07-09 Merstech, Inc. Power converter with magnetic recovery switch
US20110176343A1 (en) * 2008-09-26 2011-07-21 Merstech, Inc. Power converting apparatus
US20120037616A1 (en) * 2008-10-27 2012-02-16 Merstech Inc. Power inverter
US20110215651A1 (en) * 2008-12-12 2011-09-08 Mitsubishi Electric Corporation Power conversion apparatus
US8659924B2 (en) * 2008-12-12 2014-02-25 Mitsubishi Electric Corporation Power conversion apparatus
US20120019188A1 (en) * 2009-03-30 2012-01-26 Kazuhiko Fukutani Induction motor control device and induction motor group control system
US8395347B2 (en) * 2009-03-30 2013-03-12 Ryuichi Shimada Induction motor control device and induction motor group control system
US20120218798A1 (en) * 2009-10-28 2012-08-30 Merstech, Inc. Power conversion device
US20130121045A1 (en) * 2010-05-28 2013-05-16 Mitsubishi Electric Corporation Power conversion apparatus
US9276496B2 (en) * 2010-05-28 2016-03-01 Mitsubishi Electric Corporation Power conversion apparatus including an inverter-converter combination
CN114123938A (zh) * 2021-10-29 2022-03-01 浙江捷昌线性驱动科技股份有限公司 可调控驱动控制电路

Also Published As

Publication number Publication date
EP2146424A2 (en) 2010-01-20
CN1954482A (zh) 2007-04-25
US7843166B2 (en) 2010-11-30
WO2005109619A1 (ja) 2005-11-17
EP1768242A1 (en) 2007-03-28
EP1768242A4 (en) 2008-05-28
US20090251114A1 (en) 2009-10-08
EP2146424A3 (en) 2010-06-02

Similar Documents

Publication Publication Date Title
US7843166B2 (en) Alternating-current power supply device recovering magnetic energy
US20110199061A1 (en) Ac voltage control device
Park et al. A self-boost charge pump topology for a gate drive high-side power supply
US20130044519A1 (en) Bidirectional dc/dc converter
AU2009332039B2 (en) Current source power conversion circuit
EP2536017A2 (en) Snubber-circuit for internal switches of neutral-point-clamped three-level inverter
CA2305125C (en) Circuit arrangement with half-bridge
JP3735673B2 (ja) 磁気エネルギーを回生する交流電源装置
JP4051875B2 (ja) 整流回路及びその制御方法
WO2013175915A1 (ja) フルブリッジ電力変換装置
EP1643626A3 (en) Direct current power supply apparatus and control method for the same, and a compressor drive apparatus
JPWO2007069314A1 (ja) 電力変換装置
CN114301271B (zh) 功率变换系统及控制方法
CA3063351A1 (en) Improved power supply having four quadrant converter and techniques for operation
CN109936297B (zh) 用于充电站的电力电子模块及对应的充电站和加电站
CN112147427A (zh) 功率模块的故障检测方法及故障检测电路
JP2011151950A (ja) モータ制御装置、及び、モータ制御方法
US8242726B2 (en) Method and circuit arrangement for the feedback of commutation energy in three-phase current drive systems with a current intermediate circuit converter
JP4252281B2 (ja) モータ駆動装置
JP4037284B2 (ja) 静止型無効電力補償装置
JP2008136326A (ja) スイッチング素子のゲート駆動回路
RU2516450C2 (ru) Резонансный коммутатор
JP2015204723A (ja) 半導体装置及びそれを用いた電力変換装置
RU2658225C2 (ru) Электрическая схема транспортного средства, в частности рельсового транспортного средства
JP3763282B2 (ja) 誘導加熱装置の制御方法、回路方式

Legal Events

Date Code Title Description
AS Assignment

Owner name: CIRCLE FOR THE PROMOTION OF SCIENCE AND ENGINEERIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHIMADA, RYUICHI;SUMITANI, HIDEO;TAKAKU, TAKU;AND OTHERS;REEL/FRAME:018599/0965

Effective date: 20061108

AS Assignment

Owner name: MERSTECH INC., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THE CIRCLE FOR THE PROMOTION OF SCIENCE AND ENGINEERING;REEL/FRAME:019257/0244

Effective date: 20070215

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION