新型永磁同步电机有限控制集无模型预测电流控制

A Novel Finite Control Set Model-Free Predictive Current Control of Permanent Magnet Synchronous Motor

为了减小永磁同步电机在启动时转速容易出现超调的现象,提高系统在参数摄动时的鲁棒性,采用自抗扰控制取代传统速度环中的比例积分(proportional integral,PI)控制、白鲸算法优化自抗扰控制参数,从而降低人工整定参数的复杂度;同时采用无模型控制电流环及模型预测与超局部模型结合的方法,设计一款滑模观测器。最后通过Matlab/Simulink软件进行仿真实验,由仿真结果可知:电机启动时超调较小,在负载突变时转速能够快速恢复到稳态;转速波动由原来的4.33%降低至3.85%,且达到稳态的时间显著减少,由200 ms降低至5 ms,电流脉动仅为±0.35 A。

In order to reduce the phenomenon of speed overshoot during the startup of permanent magnet synchronous motors and improve the system’s robustness under parameter perturbations,Active Disturbance Rejection Control(ADRC)is adopted to replace the traditional Proportional Integral(PI)control in the speed loop.The ADRC parameters are optimized using the Whale Optimization Algorithm to simplify manual parameter tuning.The current loop employs model-free control.A sliding mode observer is designed by combining model prediction with a super-local model.Simulation experiments are conducted using Matlab/Simulink software.The simulation results indicate that there is less overshoot during motor startup,and the speed can quickly return to a steady state during sudden load changes.The speed fluctuation is reduced from 4.33%to 3.85%,and the time to reach steady state is significantly decreased from 200 ms to 5 ms.The current ripple is only±0.35 A.