The invention relates to the technical field of motor control, and discloses a motor control method and system and an electric power-assisted vehicle, and the motor control method comprises the steps: obtaining a sensor signal and a three-phase current; initial power-assisted torque is obtained on the basis of input voltage of a torque sensor arranged in the motor, active damping is conducted on the initial power-assisted torque, and adjusted power-assisted torque is obtained; inputting the error of the adjusting current and the feedback current into a current loop, and outputting an initial quadrature-direct axis control voltage; calculating an electrical angular velocity, and determining a voltage coupling term based on the feedback current and the electrical angular velocity; performing feedback compensation on the initial quadrature-direct axis control voltage by using a voltage coupling item to obtain a target quadrature-direct axis control voltage; and obtaining a three-phase voltage control signal according to the target quadrature-direct axis control voltage to drive the motor to rotate. According to the motor control method, the resonance problem occurring in the acceleration and deceleration processes of the vehicle can be solved, the influence of a current loop on slow convergence of a voltage item is eliminated, and it is guaranteed that the assistance response speed is not affected by various operation conditions.

    本申请涉及电机控制技术领域,公开了一种电机控制方法、系统和电动助力车辆,该电机控制方法包括:获取传感器信号和三相电流;基于电机内置转矩传感器输入电压得到初始助力转矩,将初始助力转矩进行主动阻尼,得到调节助力转矩;将调节电流和反馈电流的误差输入到电流环中,输出初始交直轴控制电压;计算电角速度,基于反馈电流和电角速度确定电压耦合项;利用电压耦合项对初始交直轴控制电压进行反馈补偿,得到目标交直轴控制电压;根据目标交直轴控制电压得到三相电压控制信号,驱动电机旋转。该电机控制方法能够解决车辆加减速过程中出现的谐振问题,消除电流环对电压项收敛较慢的影响,保证助力响应速度不会受各种运行工况的影响。


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    Title :

    Motor control method and system and electric power-assisted vehicle


    Additional title:

    一种电机控制方法、系统和电动助力车辆


    Contributors:
    ZHEN HUIJIE (author) / KIM WON-WOONG (author) / WEN HAO (author) / SU HAN (author) / GAO JUN (author)

    Publication date :

    2025-02-18


    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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