永磁同步电机自抗扰反步控制

Active disturbance rejection control and backstepping control for PMSM

为实现永磁同步电机的高性能控制,提出一种复合控制策略。在永磁同步电机矢量控制基础上,设计反步控制器用于电流环控制,得到同步旋转坐标系下定子电压,并能保证系统全局稳定。设计结构优化的线性自抗扰控制器用于速度环控制,提高系统抗干扰能力。采用二阶环节平滑速度指令,实现转速无超调。仿真结果表明该控制策略较传统PI控制具有转速适应范围广、无超调、抗扰动性能强等优点。

A compound control strategy for PMSM is proposed in order to achieve high performance control.On the basis of vector control system for PMSM,a backstepping controller is designed for electric current loop control to obtain the stator voltage in synchronous rotating coordinate and to ensure the stability of the system.A linear structure-optimized active disturbance rejection controller is designed for speed loop control to improve the anti-disturbance ability of the system.A two-order link is adopted to achieve smooth speed signal and perfect non-overshooting speed.Simulation results show that,compared with traditional PI control,the compound control strategy has wider adaptive range of speed,non-overshoot,stronger anti-disturbance ability,and so on.