A common-mode current sensor system and method for a traction inverter of an electric hybrid vehicle. The system and method detects/reduces excess common-mode currents that can be caused by the presence of alternating current (AC)-chassis type short circuit faults at the outputs of an inverter used for driving a two or more-phased load. In an embodiment, the system detects the presence of an AC-chassis fault of any varying strength, e.g., weak, medium, hard, in respective parallel paths. The system and method can isolate a particular AC-chassis type fault to a particular phase leg of the inverter thereby obviating a need of having to shut-down and/or re-program each phase leg of the whole power supply and vehicle operation. Rather, upon detecting a chassis short, a fault signal is asserted to control shutting down of one or more inverter switches without having to shut-down the vehicle or negatively impact the vehicle status.


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    Title :

    COMMON-MODE CURRENT SENSING SYSTEM AND PROTECTION METHOD FOR POWER CONVERTERS


    Contributors:

    Publication date :

    2024-10-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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



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