电动汽车用永磁同步电动机的自抗扰控制

Self-immunity control of permanent magnet synchronous motors for electric vehicles

针对电动汽车在加减速以及爬坡过程中存在着转矩脉动较大和稳定性差、快速性和超调量之间的矛盾等问题,提出了电动汽车用永磁同步电动机的自抗扰控制,设计了双闭环的自抗扰控制器。对电动汽车加减速和爬坡两种实际工况进行了模拟仿真,并与PI控制器的仿真结果进行了比较。结果表明自抗扰控制器能较好地抑制电动机电磁转矩的脉动,减小了快速性和超调量之间的矛盾,提高了电动汽车调速系统的稳定性。

In view of the contradiction between large torque pulsation,poor stability,rapidity and overshoot in the acceleration and deceleration and climbing process of electric vehicles,the PI controller in the vector control system of permanent magnet synchronous motor is proposed to replace it with an active disturbance rejection controller.An active disturbance rejection controller based on rotational speed loop and current loop is designed,and the parameters of the extended observer in the self-rejection controller are solved by the bandwidth method.By simulating the two practical problems of electric vehicle acceleration and deceleration and uphill.The results show that the positive disturbance rejection controller suppresses the pulsation of electromagnetic torque to a certain extent,solves the contradiction between speed and overshoot,improves the stability of electric vehicle speed regulation,and improves the performance of electric vehicles.