基于扩展卡尔曼滤波器的永磁同步电机转速和磁链观测器.pdf

第 27 卷 第 36 期 中 国 电 机 工 程 学 报 Vol.27 No.36 Dec. 2007 2007 年 12 月 Proceedings of the CSEE ©2007 Chin.Soc.for Elec.Eng. 0258-8013 (2007) 36-0036-05 TM 351 A 470 40 文章编号： 中图分类号： 文献标识码： 学科分类号： ⋅ 基于扩展卡尔曼滤波器的永磁同步电机 转速和磁链观测器 张 猛，肖 曦，李永东 ( 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系) ，北京市 海淀区 100084) Speed and Flux Linkage Observer for Permanent Magnet Synchronous Motor Based on EKF ZHANG Meng, XIAO Xi , LI Yong-dong (State Key Lab of Control and Simulation of Power Systems and Generation Equipments (Dept. of Electrical Engineering, Tsinghua University), Haidian District, Beijing 100084, China) ABSTRACT: To eliminate the mechanical sensors of 关键词：永磁同步电机；扩展卡尔曼滤波器；直接转矩控制； permanent magnet synchronous motor (PMSM) drive and get 无速度传感器；空间矢量调制 the stator flux linkage used in direct torque control (DTC), an 0 引言 extended Kalman filter (EKF) is established. The stator flux linkage on the fixed α-β coordinate, rotor speed and position 永磁同步电机直接转矩控制具有快速的转矩响 are chosen as state variables. The input and output of the EKF 应和良好的动态性能，吸引了很多学者进行相关研 are stator voltages and currents. The stator flux linkage and 究，并取得了一定的研究成果[1-5] 。在直接转矩控制 rotor speed are observed by EKF. DTC using space vector 当中，需要机械传感器提供电机的转速信息，机械 modulation (SVM) is applied to the system in order to reduce 传感器使系统复杂性增加，鲁棒性降低。磁链观测 the torque ripples and keep constant switching frequency. The 的准确性直接影响到转矩的控制性能。在无机械传 experimental test is carried out to verify the efficiency and 感器的情况下，如何获得准确的速度和磁链信息是 robustness of the proposed sensor-less DTC