To improve the reliability of a forcible discharge control system for a smoothing capacitor provided in an inverter.SOLUTION: When a smoothing capacitor 42 is to be forcibly discharged, first discharge control is started in which an electric charge of the smoothing capacitor 42 is consumed by an on-vehicle component 12 via a DC-DC converter 50 while having a battery 20 disconnected from a high-voltage circuit 9. After that, when a voltage of the smoothing capacitor 42 decreases and reaches a predetermined threshold value V0, second discharge control is executed in which the smoothing capacitor is forcibly discharged by an active discharge circuit 61. If a continuous forcible discharge occurs, delay control for delaying an execution timing of the second discharge control is further executed.SELECTED DRAWING: Figure 8

    【課題】インバータが備える平滑コンデンサの強制放電制御の信頼性を向上させる。【解決手段】平滑コンデンサ42を強制放電する時に、バッテリ20を高電圧回路9から遮断した状態で、平滑コンデンサ42の電荷を、DCDCコンバータ50を介して車載部品12で消費する第1放電制御を開始する。その後、平滑コンデンサ42の電圧が低下して所定の閾値V0に達した時に、アクティブ放電回路61で強制放電させる第2放電制御を実行する。連続強制放電が発生した場合には、第2放電制御の実行タイミングを遅らせる遅延制御を更に実行する。【選択図】図8


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    Title :

    FORCIBLE DISCHARGE CONTROL SYSTEM FOR SMOOTHING CAPACITOR PROVIDED IN INVERTER


    Additional title:

    インバータが備える平滑コンデンサの強制放電制御システム


    Contributors:

    Publication date :

    2023-12-13


    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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