The invention provides a motor torque control method and system for a multi-motor driven automobile. The method comprises the following steps: calculating a driving target torque difference amplitude of each motor; obtaining the time required by each motor to follow the steady-state driving target torque through the driving target torque difference amplitude of each motor and the whole vehicle driving torque change rate threshold; calculating the synchronous coordination change time of the motor; sequentially calculating the available change rate and the torque variation of the driving torque of each motor, and calculating the instantaneous driving target torque of each motor at the current moment; and finally, the motor torque of the multi-motor driven automobile is adjusted according to the instantaneous driving target torque of each motor at the current moment. According to the method, the instantaneous driving target torque of each motor can be controlled to be equal to the motor torque of the multi-motor driving automobile, so that each motor simultaneously reaches the preset target torque, the consistency of the instantaneous expected torque change of each motor at the current moment is ensured, and the driving safety of the automobile is improved.

    本发明提供了一种多电机驱动汽车的电机转矩控制方法及系统,该方法包括:在计算出各电机的驱动目标转矩差异幅值后;通过各电机的驱动目标转矩差异幅值和整车驱动转矩变化率阈值得到各电机的跟随稳态驱动目标转矩所需时间;进而计算电机同步协调变化时间;随后依次计算各电机驱动转矩可用变化率、转矩变化量和计算各电机的当前时刻的瞬时驱动目标转矩;最后根据各电机的当前时刻的瞬时驱动目标转矩调整所述多电机驱动汽车的电机转矩。本发明能够控制各个电机瞬时驱动目标转矩等于多电机驱动汽车的电机转矩,使得各个电机同时达到预设目标转矩,从而保证了各个电机当前时刻瞬态期望转矩变化的一致性,提高了车辆行驶的安全性。


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    Title :

    Motor torque control method and system for multi-motor-driven automobile


    Additional title:

    一种多电机驱动汽车的电机转矩控制方法及系统


    Contributors:
    WANG LONG (author) / YE JIANWEI (author) / XIANG XIAOLONG (author) / ZHAO WENHU (author) / HUANG ZUSHENG (author)

    Publication date :

    2023-12-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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