The electric motor drive device (100) includes a smoothing capacitor (4) and an inverter (1), and further includes an overvoltage protection unit (6) for overvoltage protection for the smoothing capacitor (4), and a phase short-circuit control unit (12). The overvoltage protection unit (6) includes: a discharge circuit (20) having a discharge resistor (7) and an IGBT (9) connected in series; and a first determination circuit (21) which determines, with determination delay, that smoothing capacitor voltage exceeds first set voltage, and turns on the IGBT (9). The phase short-circuit control unit (12) is provided in a control device (5) for drive-controlling the inverter (1) and includes a second determination circuit (13) which determines, with a determination period longer than the determination delay of the first determination circuit (21), that smoothing capacitor voltage exceeds second set voltage lower than the first set voltage, to perform phase short-circuit control for the inverter (1).


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    Title :

    ELECTRIC MOTOR DRIVE DEVICE


    Additional title:

    ANTRIEBSVORRICHTUNG FÜR EINEN ELEKTROMOTOR
    DISPOSITIF DE COMMANDE DE MOTEUR ÉLECTRIQUE


    Contributors:

    Publication date :

    2023-07-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / 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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