基于自适应Super-twisting算法的永磁同步电机驱动控制

An adaptive Super-twisting algorithm for permagnetic synchronous motor drives

在永磁同步电机调速系统中,良好的速度控制器要同时兼顾跟踪性能及抗干扰性能,非线性控制具有快速响应及强鲁棒性的优点,适用于速度控制器的设计,但传统滑模控制存在着严重的抖振问题。自适应Super-twisting算法属于二阶滑模,能将相轨迹的状态量以级数的形式收敛到原点,又能在线调整控制器的增益,因此能有效削弱抖振现象。采用自适应Super-twisting算法来设计速度控制器,并通过李雅普诺夫函数给出其稳定性证明。试验结果表明,所设计的控制器具有良好的跟踪性能及抗干扰性能,同时能减小电流的纹波,达到削弱抖振的目的。

In the permanent magnet synchronous motor(PMSM)regulation system,an excellent speed controller should have both tracking performance and anti-disturbance performance.With the advantages of fast response and strong robustness,nonlinear control is more suitable for the design of speed controller,but the traditional sliding mode control(SMC)has serious chattering problem.The adaptive Super-twisting algorithm belongs to a second-order SMC,as it could enable to converge the state variables of the phase trajectory to the origin in a series form,and adjust the controller gain online,so chattering could be effectively weakened.An adaptive Super-twisting algorithm is used to design the speed controller,and its stability is proved by the Lyapunov function.The experimental results show that the proposed controller has good tracking performance and anti-disturbance performance,and can reduce the current rippleto weaken chattering.