基于永磁同步电机的LPV转速观测器设计  

Design of LPV Speed Observer for Permanent Magnet Synchronous Motor

作　　者：杨德亮 吴定会 YANG De-liang;WU Ding-hui(Key Laboratory of Advanced Process Control for Light Industry, Jiangnan University, Wuxi 214122, China)

机构地区：[1]江南大学轻工过程先进控制教育部重点实验室,江苏无锡214122

出　　处：《测控技术》2019年第4期148-152,共5页Measurement & Control Technology

基　　金：国家自然科学基金资助项目(61572237;61672266)

摘　　要：针对提高永磁同步电机无位置传感器速度跟踪控制精度问题,提出了一种基于线性变参数(Linear Parameter Varying,LPV)转速观测器设计方法。该方法借助状态估计实现对旋转坐标系下定子电流、转子角转速等状态的重构。首先根据LPV电机模型,推导出观测器的LPV状态模型方程,然后根据Lyapunov稳定性理论,获得闭环系统的稳定性条件,再利用奇异值分解方法,将Lyapunov稳定性条件转化为线性矩阵不等式条件,通过求解不同凸胞形顶点处的观测器增益矩阵,最终合成反馈增益,实现对电机的高精度的速度跟踪控制。仿真结果表明,该观测器能够快速准确的跟踪上电机转速。A linear parameter varying( LPV) speed observer design method is proposed in order to solve the problem of improving precision when employing sensorless to track the speed of the permanent magnet synchronous motor( PMSM), which reconstruct states of stator current and totor angular speed with the assistant of state estimation. Firstly, the LPV model state equations of observer is deduced from the LPV motor model. Then, the stability conditions of the closed-loop system are obtained from the Lyapunov stability theory. Thereafter, the Lyapunov stability conditions the transformed into the linear matrix inequality conditions. Finally, the feed gain is composed by solving different convex polytopic vertex to achieve the high precision speed tracking control of the motor. The simulation results show that the observer has the performance of high accuracy for speed tracking.

关 键 词：永磁同步电机 线性变参数 转速观测器 线性矩阵不等式 速度跟踪 

分 类 号：TM381[电气工程—电机] TP211[自动化与计算机技术—检测技术与自动化装置]