Abstract：There are big ripples in motor drive on current and flux linkage and torque when using traditional direct torque control (DTC). System with speed sensor has lower reliability and higher system cost. To solve these problems, an extended Kalman filter (EKF) was established to estimate stator flux linkage and motor speed, thus speed sensorless direct torque control for surface permanent magnet synchronous motor (SPMSM) was realized. Rapid torque response and strong robustness of direct torque control method are still maintained. Ripples on current and flux linkage and torque are dramatically reduced. In the mean time, the system based on EKF is robust to motor parameters variation and load disturbance. The dynamic and static system performance are dramatically improved. The experimental results verify the feasibility and effectiveness of this method.
刘英培, 万健如, 沈虹, 李光叶, 袁臣虎. 基于EKF PMSM定子磁链和转速观测直接转矩控制[J]. 电工技术学报, 2009, 24(12): 57-62.
Liu Yingpei, Wan Jianru, Shen Hong, Li Guangye, Yuan Chenhu. Stator Flux Linkage and Rotor Speed Observation for PMSM DTC Based on EKF. Transactions of China Electrotechnical Society, 2009, 24(12): 57-62.
[1] Rahman M F, Zhong L, Haque M D Enamul, et al. A direct torque-controlled interior permanent-magnet synchronous motor drive without a speed sensor[J]. IEEE Transactions on Energy Conversion, 2003, 18(1): 17-22. [2] Faiz Jawad, Hossein Mohseni Zonoozi S. A novel technique for estimation and control of stator flux of a salient-pole PMSM in DTC method based on MTPF[J]. IEEE Transactions on Industrial Electronics, 2003, 50(2): 262-271. [3] 孙丹, 贺益康. 基于恒定开关频率空间矢量调制的永磁同步电动机直接转矩控制[J]. 中国电机工程学报, 2005, 25(12): 112-116. [4] 许俊峰, 徐英雷, 冯江华, 等. 基于改进型积分器的永磁同步电动机直接转矩控制[J]. 电工技术学报, 2004, 19(7): 77-80. [5] 韦立祥, 刘丛伟, 孙旭东, 等. 一种消除电压型磁链观测中直流偏置误差的新方法[J]. 清华大学学报(自然科学版), 2001, 41(9): 51-54. [6] Klris N R N, Yatim A H M. An improved stator flux estimation in steady-state operation for direct torque control of induction machine[J]. IEEE Transactions on Industry Applications, 2002, 38(1): 110-116. [7] 郎宝华, 刘卫国, 王永强. 基于卡尔曼滤波器的永磁同步电动机定子磁链观测研究[J]. 微电机, 2007, 40 (6): 17-20. [8] 贾洪平, 贺益康. 永磁同步电动机直接转矩控制中零矢量的作用研究[J]. 电气传动, 2006, 36(4): 13-16, 29. [9] Hu Yuwen, Tian Chun, You Zhiqing, et al. Direct torque control system and sensorless technique of permanent magnet synchronous motor[J]. Chinese Journal of Aeronautics, 2003, 16(2): 97-102. [10] 刘英培. 永磁同步调速电梯无速度传感器控制研究[D]. 天津: 天津大学, 2007.
2009, Vol. 24 
