PROBLEM TO BE SOLVED: To provide a small-sized power conversion device having a function capable of continuing power supply even when a power semiconductor switching element applied to a three-phase arm for power conversion fails partially.SOLUTION: This power conversion device 100A includes: a signal control unit 240 that when an arm 106a of an inverter circuit 102A is broken, detects values of current from connection points 116e, 116f to determine generation of abnormality; and a control unit 240 that sends, to a first connection unit 141, a control instruction signal for separating an arm 105a of one phase of arms 103a, 104a, 105a of three phases constituting a pulse width modulation rectification circuit 101A from a commercial power supply 110 and sends, to a second connection unit 142a, a control instruction signal to connect a separated position with a position at which a motor 120 and an arm 106a including broken MOSFETs 126c, 136c are connected. Thereby, the failed arm 106a of the circuit 102A is replaced with the arm 105a of a circuit 101A.SELECTED DRAWING: Figure 1

    【課題】電力変換用の三相のアームに適用されるパワー半導体スイッチング素子が一部故障しても電力供給を継続できる機能を持つ小型化された電力変換装置を提供する。【解決手段】この電力変換装置100Aでは、インバータ回路102Aのアーム106aが壊れると、接続点116e、116fからの電流値が信号制御部240で検出されて異常発生が判定され、制御部240によってパルス幅変調整流回路101Aを構成する三相のアーム103a、104a、105aのうちの一相のアーム105aを商用電源110から切り離す制御指令信号を第1の接続部141へ送出し、第2の接続部142aへ制御指令信号を送出して切り離された箇所と壊れたMOSFET126c、136cを含むアーム106aとモータ120とが接続されている箇所を接続するため、回路101Aのアーム105aが故障した回路102Aのアーム106aと置き換えられる。【選択図】図1


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    Title :

    POWER CONVERSION DEVICE, AND ELEVATOR DEVICE TO WHICH THE SAME IS APPLIED


    Additional title:

    電力変換装置及びそれを適用したエレベータ装置


    Contributors:
    KATO KAORU (author) / MORI KAZUHISA (author) / ONUMA NAOTO (author)

    Publication date :

    2017-11-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B66B Aufzüge , ELEVATORS / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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