基于改进型滑模观测器PMSM转子位置估计

Rotor Position Estimation Method for Permanent Magnet Synchronous Motor Based on the Modified Sliding Mode Observer

针对传统滑模观测器对PMSM转子位置估计抖振问题,提出一种基于改进滑模观测器的PMSM转子位置估计方法。通过模糊控制在线调节滑模观测器的增益,以抑制抖振。为了减小高频噪声对估计反电势的影响,引入了自适应低通滤波器。采用Lyapunov稳定理论,证明了改进型滑模观测器的稳定性。仿真和实验验证了该方法的有效性。

A kind of rotor position estimation method was proposed for permanent magnet synchronous motor control system based on the modified sliding mode observer（SMO）. In order to eliminate the chatting, the SMO gain was changed by the fuzzy control system. To suppress the effect of high frequency noise on the estimated back EMF, an adaptive low-pass filter was used. The stability and convergence of the algorithm was proved by the Lyapunov stability theory. The validity of the method was proved by simulation and experiment.