基于滑模观测器的PMSM变结构直接转矩控制

本文设计了一种新型控制系统,该控制系统由滑模观测器、基于Super-twisting算法的二阶滑模速度、磁链和转矩控制器组成。利用给定电流和实际电流间的误差来设计滑模观测器(SMO),通过反正切函数对转子位置进行估计。本文通过Matlab软件建立三相永磁同步电机矢量控制模型,将无传感器控制及二阶滑模控制模型引入进行仿真验证,电机的速度及转矩波形更加稳定,转子位置可以得到有效观测。结果表明此控制系统较传统控制系统得出的效果更加优越。

Variable Structure Direct Torque Control of PMSM Based on Improved Sliding Mode Observer

In this paper,a new control system is designed,which consists of a sliding mode observer,a second-order sliding mode speed controller based on Super-twisting algorithm,a flux linkage controller and a torque controller.The sliding mode observer(SMO)is designed by using the error between the given current and the actual current,and the rotor position is estimated by the arc tangent function.In this paper,the vector control model of three-phase permanent magnet synchronous motor is established by MATLAB software.Sensorless control and second-order sliding mode control model are introduced for simulation verification.The speed and torque waveforms of the motor are more stable,and the rotor position can be effectively observed.The results show that the control system is superior to the traditional control system.