The embodiment of the invention discloses a motor controller, a power assembly and an electric automobile, the motor controller comprises an inverter circuit, the inverter circuit comprises three bridge arms, each bridge arm comprises an upper bridge switch tube and a lower bridge switch tube, and bridge arm midpoints of the three bridge arms are respectively connected with a three-phase winding of a driving motor. In response to the fact that the current frequency of at least one phase of winding is larger than or equal to a first frequency threshold value, the three upper bridge switch tubes or the three lower bridge switch tubes are switched from an alternating conduction mode to a keeping conduction mode or a keeping turn-off mode, or the three upper bridge switch tubes and the three lower bridge switch tubes are switched from the alternating conduction mode to the keeping turn-off mode. And in response to the situation that the current frequency of at least one phase of winding is smaller than a second frequency threshold value, the three upper bridge switching tubes and the three lower bridge switching tubes are switched from an alternating conduction mode to a holding turn-off mode, or the three upper bridge switching tubes or the three lower bridge switching tubes are switched from a holding conduction mode to a holding turn-off mode. According to the embodiment of the invention, the control accuracy of the motor controller can be improved.

    本申请实施例公开一种电机控制器、动力总成及电动汽车,电机控制器包括逆变电路,逆变电路包括三个桥臂,每个桥臂包括上桥开关管和下桥开关管,三个桥臂的桥臂中点分别连接驱动电机的三相绕组。响应于至少一相绕组的电流频率大于或等于第一频率阈值,三个上桥开关管或三个下桥开关管由交替导通模式切换为保持导通模式或保持关断模式,或三个上桥开关管和三个下桥开关管由交替导通模式切换为保持关断模式。响应于至少一相绕组的电流频率小于第二频率阈值,三个上桥开关管和三个下桥开关管由交替导通模式切换为保持关断模式,或者三个上桥开关管或三个下桥开关管由保持导通模式切换为保持关断模式。本申请实施例,可以提高电机控制器的控制准确性。


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    Title :

    Motor controller, power assembly and electric automobile


    Additional title:

    一种电机控制器、动力总成及电动汽车


    Contributors:
    XU YANKUN (author) / ZHAO YANG (author)

    Publication date :

    2023-01-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    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



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