基于自适应滑模观测器的永磁同步电机无位置传感器控制  

A position sensorless control strategy for PMSM based on adaptive sliding mode observer

作　　者：陈炜[1] 张志伟[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《电工电能新技术》2016年第8期8-14,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51577126);天津市科技支撑计划项目(16YFZCSF00580)

摘　　要：为了实现永磁同步电机的无位置传感器控制,本文提出了一种自适应滑模观测器。该观测器通过一种李雅普诺夫函数来获取反电动势的估计方程,然后基于估计反电动势计算出转子位置。基于反电动势模型建立速度观测器,应用模型参考自适应方法,实现对电机转速的估计。仿真和实验结果表明,本文所提出的方法能够实现对转子位置和电机转速的准确估计,具有较好的动静态性能,可以改善低速下转子位置和电机转速的估计效果。In order to realize sensorless control of permanent magnet synchronous motor （PMSM） , this paper proposed an adaptive sliding mode observer. By using a Lyapunov function, the equations of the back electromotive force are derived. In this way, even without the low-pass filters and phase compensation module in this control sys- tem, the smooth back electromotive force signals can be obtained. Then the rotor position is calculated by the esti- mation of back electromotive force. Based on the back electromotive force model a velocity observer is designed. At last, the rotor velocity is estimated by using the model reference adaptive algorithm. The experiments with a 1500 r/min prototype of permanent magnet synchronous motor are carried out. The simulation and experimental results show that the proposed method can accurately estimate the rotor position and rotor velocity, and has better dynamic and static performance, which can improve the estimation performance of the rotor position and rotor velocity at low speed.

关 键 词：永磁同步电机 无位置传感器控制 反电动势 滑模观测器 

分 类 号：TM351[电气工程—电机]