基于LPV观测器的永磁同步电机反推控制

Backstepping Control of Permanent Magnet Synchronous Motor Based on LPV Observer

针对永磁同步电机(Permanent Magnet Synchronous Motor,PMSM)无速度传感器转速跟踪控制精度问题,提出了一种基于线性变参数(Lineeo Parameteo Varying,LPV)转速观测器的永磁同步电机反推控制方法。该方法首先根据PMSM的LPV模型,推导出电机的凸胞形顶点方程;然后利用Lyapunov稳定性理论,获得了基于线性矩阵不等式(Lineeo Matrix Inequality,LMI)的观测器设计方法,构造了PMSM的LPV观测器,实现对电机转速及定子交轴电流的重构;最后运用反推控制策略,设计电机闭环系统控制器,实现对电机转速的高精度跟踪控制。仿真结果表明,该方法相较与传统PI矢量控制,跟踪精度高、响应快、抗负载扰动强,对实现PMSM的无速度传感器高精度转速跟踪控制具有重要意义。

A backstepping control method based linear parameter varying(LPV)speed observes is proposed for improving precision when employing sensorless to track the speed of tie permanent maanet synchronous motov(PMSM).The convee polytopic vertee equations of PMSM was deduced from the LPV motor model,and an observev design method based on linear matrix inequality(LMI)was obtained by using Lyapunov stability theory,and an LPV observev of a PMSM was constructed to realize the reconstruction of speed and statov quadrature axis current,and the closed-loop system controller were designed by using the backstepping control strategy to achieve the high precision speed tracking control of the motor. The simulation results show that the method has the performances of high accuocy fast response and strong obustness of load disturbancc foa speed tracking compared with PI vector controi.It has great significance to realize the PMSM sensorless high-precision speed tracking control.