永磁同步电机滑模变结构直接转矩控制_贾洪平.pdf

2006 1 Vol.21 No.1 21 1 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Jan. 2006 310027 TM301.2 Variable Structure Sliding Mode Control for PMSM DTC Jia Hongping He Yikang Zhejiang University Hangzhou 310027 China Abstract To solve those problems associated with conventional Direct Torque Control (DTC) of Permanent Magnet Synchronous Machine (PMSM), such as high flux and torque ripple, variable switching frequency, difficulty to accurately control at very low speed and high frequency noise caused by the high torque ripple, a new variable structure sliding mode (VSS) control strategy is proposed in this paper. Simulation results verify that the proposed control scheme significantly reduces flux and torque ripple, preserves fast torque response merit, and shows robust to motor parameters uncertainty, disturbance, measurement error and measurement noise. It effectively improves dynamic and static operation performance, and is a novel modified control method for PMSM DTC. Keywords Direct torque control, variable structure sliding mode, hysteresis regulator, continuous function 1 DTC [3] [1,2] DTC