This application provides an electric drive system, a powertrain, and an electric vehicle, and relates to the field of power electronics technologies. The electric drive system is connected to a power battery pack to drive a motor, the motor includes an exciting winding, and the electric drive system includes a bus, a three-level inverter circuit, an electric excitation circuit, and a controller. The bus includes a positive bus and a negative bus. The three-level inverter circuit includes a first bus capacitor and a second bus capacitor. The first bus capacitor is connected between the positive bus and a bus midpoint, and the second bus capacitor is connected between the negative bus and the bus midpoint. A first input terminal of the electric excitation circuit is connected in parallel to the first bus capacitor, a second input terminal of the electric excitation circuit is connected in parallel to the second bus capacitor, and an output terminal of the electric excitation circuit is connected to the exciting winding of the motor. The controller is configured to control a working state of the electric excitation circuit, to balance an electric potential of the bus midpoint. A capability of adjusting the electric potential of the bus midpoint is improved by using the electric drive system.


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    Title :

    ELECTRIC DRIVE SYSTEM, POWER ASSEMBLY AND ELECTRIC VEHICLE


    Additional title:

    ELEKTRISCHES ANTRIEBSSYSTEM, LEISTUNGSANORDNUNG UND ELEKTROFAHRZEUG
    PROPULSION ÉLECTRIQUE, ENSEMBLE DE PUISSANCE ET VÉHICULE ÉLECTRIQUE


    Contributors:
    CHEN YUE (author) / ZHANG XUELIANG (author) / FENG NINGBO (author)

    Publication date :

    2024-01-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / 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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