摘要：针对永磁同步电机的直接转矩控制系统中因扰动引起转矩脉动及系统鲁棒性差的问题，本文采用一种基于Supertwisting滑模的转矩环控制方法，设计转矩和磁链控制器。根据滑模变结构控制的特点来抑制系统中的扰动，进而减小转矩脉动并增加系统的鲁棒性；同时在分析Supertwisting滑模的基础上，将其中的开关函数用双曲正切函数替换，系统在高频运动下没有明显抖振，效果良好。与常规的滞缓控制相比，Supertwisting滑模控制的转矩脉动明显减少，且对电机的扰动具有更强的鲁棒性，仿真结果验证了该法的有效性。
关键词：滑模控制；永磁同步电机；直接转矩；切换函数

Abstract: Due to the problem of torque ripple and system robustness in direct torque control system of permanent magnet synchronous motor (PMSM), a torque control method based on Supertwisting sliding mode was adopted, and torque and flux linkage controller was designed in this paper. According to the characteristics of sliding mode variable structure control to suppresse the disturbance in the system ,then the torque ripple was reduced and the robustness of the system was increased. At the same time, based on the analysis of Supertwisting algorithm, the switching function substituted for hyperbolic tangent function results that the system has no obvious chattering in high frequency motion, and the effect is fine. Compared with the conventional slow control, torque ripple of Supertwisting sliding mode control was significantly reduced, and more robust to motor disturbance. The simulation results verified the effectiveness of the method.
Key words: sliding mode control;permanent magnet synchronous motor；direct torque；switching function