基于非奇异快速终端滑模的永磁同步电机转速和电流控制

Speed and Current Control of Permanent Magnet Synchronous Motor Based on Non-Singular Fast Terminal Sliding Mode

针对永磁同步电机在矢量控制中存在转速和电流频繁超调、稳态精度低、鲁棒性弱等问题,运用非奇异快速终端滑模控制器替代传统PI控制下的转速环控制器和电流环控制器,并采用李雅普诺夫函数证明了3个控制器的稳定性。借助MATLAB/Simulink仿真软件分析了采用非奇异快速终端滑模控制器和PI控制器的转速、电流响应波形。仿真结果表明:采用非奇异快速终端滑模控制器有更小的超调量、更高的稳态精度和更强的鲁棒性。

Permanent magnet synchronous motor had many problems in vector control,such as frequent overshoot of speed and current,low steady-state accuracy and weak robustness.Three non-singular fast terminal sliding mode controllers were adopted to replace the speed loop controller and current loop controllers used in traditional PI control,and the stability of the three controllers was proved by using Lyapunov function.The response waveforms of speed and current of using non-singular fast terminal sliding mode controller and PI controller were analyzed by MATLAB/Simulink simulation software.The simulation results showed that the non-singular fast terminal sliding mode controller had less overshoot,higher steady-state accuracy and stronger robustness.