基于高阶滑模的PMSM无传感器控制

Sensorless Control of PMSM Based on High Order Sliding Mode

针对传统永磁同步电机(PMSM)无传感器控制存在的超调量大、抖振明显,易受负载扰动影响的现象。提出一种基于高阶滑模的控制策略,结合超螺旋算法(STA)和任意阶算法设计出新型高阶滑模控制器,将新型的控制器分别应用于速度控制器、状态观测器和扭矩观测器,用饱和函数代替符号函数,同时采用积分滑模面和模糊控制对控制系统进行优化。系统使用状态观测器和锁相环(PLL)获取转子位置信息,并通过扭矩观测器将观测值前馈补偿至速度控制器。经过模拟仿真表明该高阶滑模控制系统可以有效地抑制超调和抖振,提升转子位置的估算精度,同时大大提升了系统的抗干扰性和鲁棒性。

The sensorless control of traditional permanent magnet synchronous motor(PMSM)is characterized by large overshoot,obvious chattering and easy to be affected by load disturbance.A control strategy based on high order sliding mode is proposed,and a new high order sliding mode controller is designed by combining the super-twisting algorithm(STA)and any order algorithm.The new controller is applied to the speed controller,state observer and torque observer respectively.Replace the sign function with the saturation function,and the integral sliding mode surface and fuzzy control are used to optimize the control system.The rotor position information is obtained by the state observer and phase locked loop(PLL),and the observed value of torque observer is fed forward to the speed controller.The simulation results show that the high order sliding mode control system can effectively weaken overshoot and chattering,improve the accuracy of rotor position estimation,and greatly improve the anti-interference and robustness of the system.