PROBLEM TO BE SOLVED: To provide a power converter for a railway car having a step-up chopper circuit that prevents an overvoltage of an output voltage at a time of reattaching a line after a detachment and continues a stable operation of the power converter for a railway car.SOLUTION: The power converter for a railway car can be connected to a DC overhead wire via a current collector, and includes an insulation type DC/DC converter having a step-up chopper for boosting DC power supplied via the current collector. A detachment detection unit detects that the current collector is in a state detached from the DC overhead wire. A control unit suppresses an increase in a conduction ratio of the step-up chopper so as to suppress a rise in an output voltage of the power converter for the railway car from the detection of the detachment to the reattachment line.SELECTED DRAWING: Figure 2

    【課題】昇圧チョッパ回路を有する鉄道車両用電力変換装置において、離線後の再着線時に出力電圧の過電圧を防止して鉄道車両用電力変換装置の安定動作を継続させる。【解決手段】実施形態の鉄道車両用電力変換装置は、直流架線に集電器を介して接続可能であり、前記集電器を介して供給された直流電力の昇圧を行う昇圧チョッパを有する絶縁型DC/DCコンバータを備えた鉄道車両用電力変換装置である。そして、離線検出部は、集電器が直流架線から離線した状態にあることを検出する。制御部は、離線を検出してから再着線に至るまでに、当該鉄道車両用電力変換装置の出力電圧の上昇を抑制すべく昇圧チョッパの通流率の上昇を抑制する。【選択図】図2


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    Title :

    POWER CONVERTER FOR RAILWAY CAR


    Additional title:

    鉄道車両用電力変換装置


    Contributors:

    Publication date :

    2017-11-16


    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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