This article investigates an enhanced model predictive torque control (MPTC) strategy to improve the fault-tolerant capability of a five-phase permanent magnet synchronous motor drive under open-circuit fault operation. The conventional fault-tolerant MPTC is focused on the control of the stator flux amplitude and the torque in the fundamental subspace, suffering from the influences of the unregulated harmonic subspace and the large computational burden. Hence, an MPTC strategy considering the control of both fundamental and harmonic subspaces is proposed. Apart from the stator flux and the torque, the harmonic current in the x-y subspace is also selected and controlled in this strategy. In addition, to mitigate the workload of the proposed MPTC, the voltage vectors are preselected according to the stator flux error. With the proposed MPTC, the regulation of both subspaces is realized. Furthermore, the computational burden is significantly alleviated. Finally, comparative experiments are conducted to validate the effectiveness of the proposed control strategy.

中文翻译：

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带谐波抑制和电压预选的容错五相永磁同步电机的增强模型预测转矩控制

本文研究了一种增强型模型预测转矩控制 (MPTC) 策略，以提高开路故障操作下五相永磁同步电机驱动器的容错能力。传统的容错 MPTC 专注于控制基波子空间中的定子磁链幅值和转矩，受到未调节的谐波子空间和大量计算负担的影响。因此，提出了一种同时考虑基波和谐波子空间控制的 MPTC 策略。除了定子磁通和转矩，在这个策略中还选择和控制了 xy 子空间中的谐波电流。此外，为了减轻所提出的 MPTC 的工作量，根据定子磁通误差预选电压矢量。有了提议的 MPTC，实现了两个子空间的调节。此外，显着减轻了计算负担。最后，进行对比实验以验证所提出的控制策略的有效性。