电工技术学报2016，Vol.31Issue(11)：59-67,9.
基于高性能磁链算法的永磁同步电动机无位置传感器控制
Position Sensorless Control of Permanent Magnet Synchronous Motor Based on High Performance Flux Estimation Algorithm
李彪 1李黎川1
作者信息
- 1. 西安交通大学电气工程学院 西安 710049
- 折叠
摘要
Abstract
Accurate flux estimation is the key to position sensorless control of permanent magnet synchronous motor based on flux observation. Traditional flux estimation algorithms,based on the voltage model,can effectively solve the problems associated with a pure integrator,and can estimate the flux exactly in the round rotating magnetic field situation. But in real motors,the elliptical rotating magnetic field will introduce magnitude and phase errors in the steady state. The relationship between the back electromotive force(EMF)vector and the flux vector in the elliptical rotating magnetic field is analyzed. After an error analysis of the traditional flux estimation algorithms in the elliptical rotating magnetic field,an improved flux estimation algorithm is proposed. The new algorithm can estimate the flux exactly either in the round rotating magnetic field or in the elliptical rotating magnetic field with similar computational complexity to traditional algorithms. The new algorithm has been used for rotor position estimation in position sensorless vector control of a surfacermounted permanent magnet synchronous motor. Simulation results show that,the new algorithm has good speed and position tracking effect either in the steady state or when the motor speed has step changes. The experiment is implemented using the digital signal processor TMS320F2812DSP. Experimental results show that,in the medium and high speed region,the speed control system has good steady state performance as well as dynamic performance when the motor speed has step changes. But it will be unstable in the lowrspeed region. Both simulation and experiment results show the validity and applicability of the new algorithm.关键词
磁链辨识/椭圆形旋转磁场/永磁同步电动机/无位置传感器控制Key words
Flux estimation/elliptical rotating magnetic field/permanent magnet synchronous motor/position sensorless control分类
信息技术与安全科学引用本文复制引用
李彪,李黎川..基于高性能磁链算法的永磁同步电动机无位置传感器控制[J].电工技术学报,2016,31(11):59-67,9.
