The invention provides a motor controller, a power assembly and an electric vehicle, the motor controller is used for outputting a driving current or a heating current to an asynchronous motor, and the driving current and the heating current are both three-phase currents. The waveform of each phase of current of the driving current is sine wave, and the driving current is used for controlling the output torque of the asynchronous motor. The waveform of each phase of current of the heating current is a square wave or a step wave, the heating current is used for controlling the torque output by the asynchronous motor to be zero and heating an asynchronous motor winding, and heat generated by the heating current on the asynchronous motor winding heats the power battery through the heat conduction device. According to the motor controller provided by the invention, by adjusting the waveform of the heating current, the thermal stress borne by the switching device in the motor controller is reduced, so that the service life of the switching device is prolonged, and the heating power can be further improved under the condition that the heat resistance of the switching devices used by the motor controller is the same.

    本申请提供一种电机控制器、动力总成以及电动汽车,电机控制器用于向异步电机输出驱动电流或者加热电流,驱动电流和加热电流均为三相电流。驱动电流的每相电流的波形为正弦波,驱动电流用于控制异步电机输出扭矩。加热电流的每相电流的波形为方波或者阶梯波,加热电流用于控制异步电机输出的扭矩为零并加热异步电机绕组,加热电流在异步电机绕组上产生的热量通过热传导装置加热动力电池。本申请提供的电机控制器通过调整加热电流的波形,来降低电机控制器中的开关器件受到的热应力,从而提高开关器件的寿命,在电机控制器使用的开关器件耐热能力相同的情况下,还可以进一步提高加热功率。


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    Title :

    Motor controller, power assembly and electric automobile


    Additional title:

    一种电机控制器、动力总成以及电动汽车


    Contributors:
    LU CHUNHONG (author) / TANG ZHENGYI (author) / BAI LIFEI (author)

    Publication date :

    2024-04-09


    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 / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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