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在汽车换挡过程中,电机控制需要从力矩环切换到速度环,进行速度跟踪。若速度跟踪准确,则从速度环切换到力矩环对电机控制,而在此过程中电流调节器存在饱和问题。针对上述问题,利用一种有效的方法来解决换挡过程中电流调节器的饱和问题。该方法通过电流解耦环和电压补偿环的控制,能够解决永磁同步电机在速度变化较大时电流调节器饱和的问题,并且能够快速、准确地跟踪电流。最后建立了电流解耦和电压补偿的PMSM的双闭环控制系统模型,仿真结果证明了该方法的可行性,并且在工程实际中得到了验证。
In the car shift process, the motor control need to switch from the torque ring to the speed loop, the speed tracking. If the speed tracking is accurate, switch from the speed loop to the torque loop for motor control, and there is a saturation problem with the current regulator during this process. In view of the above problems, an effective method is used to solve the saturation problem of the current regulator in the shift process. The method can solve the problem that the current regulator is saturated when the speed of the permanent magnet synchronous motor changes greatly through the control of the current decoupling loop and the voltage compensation loop, and can track the current quickly and accurately. Finally, a double closed-loop control system model of PMSM with current decoupling and voltage compensation is established. The simulation results prove the feasibility of this method and have been verified in engineering practice.