带扰动补偿的离散滑模SPMSM模型预测电流控制

Model Predictive Current Control for SPMSM Using Discrete Sliding-Mode Control Based on Disturbance Compensation

针对永磁同步电机模型预测电流控制的调速系统往往会出现运行不稳定,在受到外部扰动时速度波动较大这一现象,提出了带负载扰动观测的离散滑模控制永磁同步电机模型预测电流控制方法.在表面式永磁同步电机模型预测电流控制算法研究的基础上,设计了离散滑模速度控制器取代比例—微分(PI)调节器,抑制了超调,提高了系统的启动性能.提出了离散滑模扰动观测器并对负载进行前馈补偿,有效的抑制了外部的扰动,提高了系统的鲁棒性.通过仿真验证了该控制策略可提高系统的动态性能和稳态精度.

The speed control system of a permanent magnet synchronous motor based on model predictive current control often exbits unstable operation and speed fluctuatation under external disturbance. We propose a discrete sliding-mode control for a permanent magnet synchronous motor model,based on predictive current control with a load disturbance observation. Based on the current predictive control algorithm for a surface permanent magnet synchronous motor,we design a discrete sliding-mode speed controller to replace the PI regulator,suppress the overshoot,and improve the starting performance of the system. We propose a discrete sliding-mode perturbation observer and use it for feed-forward compensation. The observer suppresses the external disturbance effectively and improves the robustness of the system. The simulation shows that this control strategy can improve the system's dynamic performance and steady-state precision.