关键词: 永磁同步电机, 模型预测控制, 多步预测, 开关频率

Abstract: The relationship between the average switching frequency, the predicted step size and the control performance and real-time performance was studied by using the multi-step model of the permanent magnet synchronous motor. By establishing a multi-step model predictive current control framework, the control and real-time performance of the model predictive current control are analyzed under different switching frequencies and prediction horizons. The simulation results showed that the one-step to five-step model predictive control of current exhibits similar control performance at high switching frequencies. At low switching frequencies, the control performance shows a significant improvement compared to
the one-step model predictive control. Nonetheless, there is no notable difference in control performance between the twostep and five-step models. Multi-step model predictive current control is not suitable for high switching frequency applications. At low switching frequencies, the prediction horizon does not need to be excessively large.

Key words: permanent magnet synchronous motor,model predictive control,multi-step prediction,switching frequency