A vehicle ground fault detection apparatus (1) detects a ground fault of a high-voltage system electrically insulated from a vehicle body connected to a low-voltage system and includes a transformer (2) blocking a DC component between the low- and high-voltage systems, an oscillation circuit (3), in the low-voltage system, connected to a primary coil (21) of the transformer (2), and a voltage dividing resistor (4), in the high-voltage system, connected to a secondary coil (22) of the transformer (2). The vehicle ground fault detection apparatus (1) measures a positive peak of voltage generated in the voltage dividing resistor (4) by voltage induced in the secondary coil (22) through AC voltage generated by the oscillation circuit (3) and detects the ground fault using the peak voltage. The insulation of the coupling portion between the ground fault detection circuit and the high-voltage system circuit does not suffer breakdown during temporary AC noise.


    Access

    Download


    Export, share and cite



    Title :

    VEHICLE GROUND FAULT DETECTION APPARATUS


    Contributors:

    Publication date :

    2018-01-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



    VEHICLE GROUND FAULT DETECTION APPARATUS

    KOBAYASHI YASUHIRO | European Patent Office | 2017

    Free access

    Vehicle ground fault detection apparatus

    WATANUKI FUMIHITO | European Patent Office | 2019

    Free access

    Vehicle ground fault detection apparatus

    KOBAYASHI YASUHIRO | European Patent Office | 2018

    Free access

    Vehicle ground fault detection

    ELSHAER MOHAMED / GALE ALLAN ROY / CHEN CHINGCHI | European Patent Office | 2020

    Free access

    Vehicle ground fault detection

    ELSHAER MOHAMED / GALE ALLAN ROY / CHEN CHINGCHI | European Patent Office | 2021

    Free access