Systems, methods and apparatus are presented to determine high voltage cable connectivity between an inverter module and a remote electric machine. A high frequency (HF) interlock module can be configured to inject a high frequency excitation signal that can be superimposed on inverter drive signals. High frequency current components can be determined and used to determine connectivity status. The sum and difference of positive and negative sequence component values can be compared to predetermined limitations to detect one or more open phases. An example method can include enabling a HF detection strategy under predetermined conditions. In response to an open phase detection a fault flag can be set.


    Access

    Download


    Export, share and cite



    Title :

    High-frequency signal injection based high voltage interlock


    Contributors:
    WANG CHANG-JIANG (author) / DEGNER MICHAEL W (author) / WU JI (author)

    Publication date :

    2015-10-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / F16P SAFETY DEVICES IN GENERAL , Schutzvorrichtungen allgemein / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    High frequency injection-based high voltage interlock

    XU WEI / SYED FAZAL URRAHMAN | European Patent Office | 2019

    Free access

    HIGH-VOLTAGE INTERLOCK SYSTEM

    BLAKBORN WILLEM | European Patent Office | 2019

    Free access

    High-voltage interlock system

    BLAKBORN WILLEM | European Patent Office | 2020

    Free access

    Vehicle High Voltage Interlock

    BURKMAN WESLEY EDWARD / BOLDUC ROBERT | European Patent Office | 2018

    Free access

    Vehicle high voltage interlock

    BURKMAN WESLEY EDWARD / BOLDUC ROBERT | European Patent Office | 2019

    Free access