九相开绕组永磁同步电机谐波电流模型预测控制

A Harmonic Current Model Predictive Control for Nine-phase Open-end Winding Permanent Magnet Synchronous Motors

为实现九相开绕组永磁同步电机谐波电流的准确跟踪,该文提出一种谐波电流模型预测控制方法。该方法根据谐波空间电压矢量分布规律,以开关状态切换最少为原则设计三次谐波空间虚拟电压矢量。针对三次谐波虚拟电压矢量空间分布重叠的寻优问题,考虑对基波空间最优矢量开关状态的影响,改进谐波空间寻优策略,同时简化寻优计算过程。最后,通过实验验证该文所提方法的可行性。结果表明,所提方法在未增加开关频率的同时实现了有效的谐波电流控制。

To track harmonic current accurately in the nine-phase open-end winding permanent magnet synchronous motors(PMSM),this paper proposes a harmonic current model predictive control method.According to the distribution of voltage vectors in the harmonic subspaces,this method designs virtual voltage vectors(VVV)in third harmonic subspace,which is based on the criterion of minimizing switch state switching.Then,to overcome the optimization problem of overlapping spatial distribution of third harmonic VVVs,this paper proposes an improved method for selecting the optimal vector in harmonic space,while simplifying the optimization calculation process.Finally,the feasibility of the proposed method is verified by experiments.The experimental results show that the proposed method provides effective harmonic current control without increasing the switching frequency.