The fault-tolerant control method of dual three-phase permanent-magnet synchronous motor (PMSM) drives has gained more and more attention in some applications, such as aircraft system and offshore wind energy system. In this letter, the reason for the torque ripple caused by the standard control method has been investigated in view of the frequency domain after the occurrence of a single open-phase fault. Based on the theoretical analysis, a universal control scheme has been proposed for the dual three-phase PMSM drives with two isolated neutral points, which can be implemented under either healthy condition or fault condition. The key is to modify with a closed-loop controller on harmonic subspace with the notch filter. The proposed method not only realizes the seamless transition between two operation conditions without fault diagnosis but also avoids the reconfiguration of the control structure. Moreover, the system optimization of the minimum copper loss under postfault condition has been integrated into the proposed method. The experimental results are presented to illustrate the effectiveness of the proposed method.

中文翻译：

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单相缺相故障的双三相 PMSM 驱动通用控制方案


双三相永磁同步电机（PMSM）驱动器的容错控制方法在飞机系统和海上风能系统等应用中受到越来越多的关注。本文从频域角度研究了单次缺相故障发生后标准控制方法引起转矩脉动的原因。基于理论分析，提出了一种适用于具有两个隔离中性点的双三相 PMSM 驱动器的通用控制方案，该方案可以在健康条件或故障条件下实现。关键是用带陷波滤波器的谐波子空间上的闭环控制器进行修改。该方法不仅实现了两种运行工况之间的无缝过渡而无需故障诊断，而且避免了控制结构的重新配置。此外，故障后条件下最小铜损的系统优化已集成到所提出的方法中。实验结果说明了该方法的有效性。