In this article, a new power switch open-circuit fault diagnosis approach is proposed for the six-phase fault-tolerant permanent magnet synchronous motor (FTPMSM) system based on average current Park's vector (ACPV), which can detect the fault power switch for the FTPMSM system in both normal and phase open-circuit/short-circuit fault-tolerant operation conditions. To detect the power switch open-circuit fault, the fault detection approach based on the moduli of the ACPV in two orthogonal subspaces is first proposed for the six-phase FTPMSM system even in phase open-circuit and short-circuit fault-tolerant operation. Then, the ACPV-based fault location approach is proposed, which can identify the fault power switch according to the sign symbol of the ACPV. The resulting fault diagnosis approach has a simple structure and low computation burden, which can detect the power switch open-circuit fault online for the FTPMSM system in both normal and fault-tolerant operation conditions. Finally, the effectiveness of the proposed fault diagnosis approach is demonstrated by a six-phase FTPMSM system experimental platform.

中文翻译：

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正常和容错运行条件下六相FTPMSM系统功率开关开路故障诊断的平均电流Park矢量法

本文针对六相容错永磁同步电机（FTPMSM）系统提出了一种基于平均电流帕克矢量（ACPV）的电源开关开路故障诊断新方法，该方法可以检测故障电源开关FTPMSM 系统在正常和相开路/短路容错操作条件下。为检测功率开关开路故障，首先针对六相FTPMSM系统提出了基于两个正交子空间ACPV模的故障检测方法，即使在相开路和短路容错运行中。然后，提出了基于ACPV的故障定位方法，该方法可以根据ACPV的符号符号来识别故障电源开关。由此产生的故障诊断方法结构简单，计算负担低，可以在线检测FTPMSM系统在正常和容错运行条件下的电源开关开路故障。最后，通过六相 FTPMSM 系统实验平台证明了所提出的故障诊断方法的有效性。