To provide a vehicular power supply system for determining whether an output voltage abnormality is due to an abnormality in a DC-DC converter or due to external voltage.SOLUTION: In a vehicular power supply system 10, in a case where an output voltage V0ut of a DC-DC converter 20 is equal to or higher than a voltage reference value and an inner current I1 of the DC-DC converter is less than a current reference value, a control circuit 90 stops the DC-DC converter and then, when the output voltage becomes less than the voltage reference value, restarts the operation of the DC-DC converter. In a case where the output voltage is equal to or higher than the voltage reference value and the inner current is equal to or higher than the current reference value, the control circuit stops the DC-DC converter, and then, even when the output voltage becomes less than the voltage reference value, does not restart the operation of the DC-DC converter.SELECTED DRAWING: Figure 1

    【課題】出力電圧異常がDC−DCコンバータの異常に起因するのか外部電圧に起因のかを判別する車両用電源システムを提供する。【解決手段】車両用電源システム10は、DC−DCコンバータ20の出力電圧V0utが電圧基準値以上であり、かつ、DC−DCコンバータの内部電流I1が電流基準値未満の場合には、制御回路90が、DC−DCコンバータを停止させ、その後に出力電圧が電圧基準値を下回ったときにDC−DCコンバータの動作を再開させる。出力電圧が電圧基準値以上であり、かつ、内部電流が電流基準値以上の場合には、制御回路が、DC−DCコンバータを停止させ、その後に出力電圧が電圧基準値を下回ってもDC−DCコンバータの動作を再開させない。【選択図】図1


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    Title :

    VEHICULAR POWER SUPPLY SYSTEM


    Additional title:

    車両用電源システム


    Contributors:
    OMIYA YUJI (author)

    Publication date :

    2020-11-05


    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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