永磁同步电机无速度传感器改进DTC研究  

Research on Speed Sensorless Improved DTC of PMSM

作　　者：徐艳平[1] 郭科[2] 钟彦儒[1] 

机构地区：[1]西安理工大学,电气工程系,陕西西安710048 [2]宁夏电力公司经济技术研究院,宁夏银川750011

出　　处：《电力电子技术》2013年第5期91-93,共3页Power Electronics

基　　金：国家自然科学基金青年基金项目(51107098);陕西省教育厅科学研究计划项目(11JK0891)~~

摘　　要：在永磁同步电机(PMSM)直接转矩控制(DTC)系统中,速度传感器的安装带来了成本高、维护困难等问题,而磁链的准确观测对DTC系统性能具有重要意义。为实现系统的无速度传感器控制和准确的磁链观测,在基于空间矢量调制(SVM)的改进DTC策略基础上,采用扩展卡尔曼滤波器(EKF)在线观测出PMSM的定子磁链和转速,不仅实现了系统的无速度传感器控制,而且实现了对定子磁链的准确观测。实验结果证明了该方法的可行性和有效性,系统具有优良的静动态性能。In the direct torque control （DTC） system of permanent magnet synchronous motor （PMSM）, speed sensors have the disadvantages of high cost and difficult maintenance, and accurate observation of flux linkage is significant to the whole control system performance.In order to realize the speed sensorless control and the accurate observation of flux linkage, an extended Kalman fiher（EKF） is used into on-line observe stator flux linkage and speed based on space vector modulation （SVM） DTC of PMSM, then speed sensorless control of the system can be realized and the accurate observation of stator flux linkage can also be realized.Experimental results clearly demonstrate feasibility and validity of the proposed control strategy and the system has good steady and dynamic performance.

关 键 词：永磁同步电机 直接转矩控制 无速度传感器 磁链观测 

分 类 号：TM315[电气工程—电机]