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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.
Aiming at the phenomenon that the current control system of PMSM model predicts current control often has instable operation and large speed fluctuation under external disturbances, a discrete sliding mode control PMSM model with load disturbance observation is proposed Current control method Based on the research of current predictive control algorithm of surface permanent magnet synchronous motor model, a discrete sliding mode speed controller is designed to replace the proportional-differential (PI) regulator, which can restrain the overshoot and improve the system startup performance The discrete sliding mode disturbance observer is proposed and feedforward compensation is performed on the load, which effectively restrain external disturbances and improve system robustness.The simulation results show that the proposed control strategy can improve the dynamic performance and steady state accuracy of the system .