An insulation detecting device includes a flying capacitor that holds a charged voltage, and a measurement and calculation unit that measures the charged voltage of the flying capacitor and calculates a ground fault resistance formed between a direct-current power supply electrically insulated from a ground, and the ground, based on the measured voltage. The flying capacitor includes one or a plurality of first capacitors, one or a plurality of second capacitors connected with the first capacitor in parallel, and a parallel cancellation switch arranged between the first capacitor and the second capacitor, and which performs parallel connection, and cancellation of the parallel connection, between the first capacitor and the second capacitor. A capacitance of the flying capacitor is variably changed by turning on or turning off of the parallel cancellation switch.


    Access

    Download


    Export, share and cite



    Title :

    Insulation detecting device


    Contributors:

    Publication date :

    2018-01-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    INSULATION ABNORMALITY DETECTING DEVICE AND INSULATION ABNORMALITY DETECTING METHOD

    KAWANAKA SHOTA / FURUKAWA TAKAHIRO / TANAKA HIROMASA et al. | European Patent Office | 2017

    Free access

    Insulation state detecting device

    KAWAMURA YOSHIHIRO | European Patent Office | 2017

    Free access

    Insulation state detecting device

    KAWAMURA YOSHIHIRO / MATSUMOTO MITSUNORI | European Patent Office | 2016

    Free access

    Insulation detecting device and insulation detecting method of non-grounded power supply

    KAWAMURA YOSHIHIRO | European Patent Office | 2017

    Free access

    Device for detecting a defect in insulation

    CHATROUX DANIEL / CARCOUET SEBASTIEN / DAUCHY JULIEN | European Patent Office | 2017

    Free access