This vehicle ground fault detection apparatus maintains a high level of insulation in an aluminum electrolytic capacitor to improve long-term reliability. This vehicle ground fault detection apparatus (10) detects a ground fault of a DC power supply by connecting the positive terminal or the negative terminal of a high-voltage power supply to one terminal of a coupling capacitor (15) provided with aluminum electrolytic capacitors (C1, C2, C3), applying a square-wave pulse signal to a measurement point at the other terminal of the coupling capacitor, and detecting a voltage signal generated at the measurement point. The vehicle ground fault detection apparatus (10) includes a charger and discharger (CPU 13) that charges and discharges the coupling capacitor when a ground fault of the DC power supply is not being detected.


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    Title :

    Vehicle ground fault detection apparatus


    Contributors:

    Publication date :

    2018-05-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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