改进滑模观测器的高速永磁同步电机矢量控制

Vector Control of High-speed Permanent Magnet Synchronous Motor Based on Improved Sliding Mode Observer

针对滑模观测器在高速永磁同步电机转子位置检测中的抖振问题,提出了一种应用于高速永磁同步电机位置检测的改进滑模观测器。将sigmoid函数作为切换函数,引入与转子转速相关的自适应滑模增益,并从中推导出了包含转子位置和转速信息的转子磁链估计值,为了消除转子磁链估计值中的高频抖振,设计了转子磁链观测器,最后应用锁相环提取出转子位置和速度信息。simulink仿真结果验证了该方法的可行性和有效性。

In order to solve the chattering problem of sliding mode observer in rotor position detection of high-speed permanent magnet synchronous motor,an improved sliding mode observer for position detection of high-speed permanent magnet synchronous motor is proposed.Taking the sigmoid function as the switching function,the adaptive sliding mode gain related to the rotor speed is introduced,and the rotor flux estimation including the rotor position and speed information is derived.In order to eliminate the high frequency chattering in the rotor flux estimation,a rotor flux observer is designed.Finally,the rotor position and speed information is extracted by phase-locked loop.Simulink simulation results verify the feasibility and effectiveness of the method.