基于扩展电压矢量的永磁同步电机模型预测转矩控制

基于永磁同步电机直接转矩控制方法电压矢量选择区域,结合不同幅值和相位的电压矢量变化时对磁链和转矩的影响规律,在电压矢量的4个选择区域扩展多个电压矢量。同时根据不同转矩磁链增减要求,选择合适的电压矢量组。最后使用可变权重系数的模型预测控制选择最优矢量。仿真结果表明:通过使用扩展的电压矢量,PMSM直接转矩控制运行良好,磁链和转矩控制均符合要求,转矩波动较小,转速曲线响应迅速且波动较小,定子磁链为理想圆。

Model Predictive Torque Control of Permanent Magnet Synchronous Motor Based on Extended Voltage Vector

Based on the direct torque control method of permanent magnet synchronous motor (PMSM),multiple voltage vectors were extended in the four selection areas of voltage vectors,combining with the influence law of different amplitude and phase voltage vectors on flux and torque.At the same time,according to different requirements of torque flux increase and decrease,the appropriate voltage vector group was selected.Finally,the model predictive control with variable weight coefficient was used to select the optimal vector.The simulation results show that the PMSM DTC works well by using the extended voltage vector,the flux and torque control meet the requirements,the torque fluctuation is small,the speed curve response is rapid and the fluctuation is small,and the stator flux is an ideal circle.