A Review of Fault Features for Inter-turn Short Circuit Fault of PM Motor

With the development of technology in various fields, permanent magnet (PM) motors has been widely used for its simple, efficient, light and small characteristics, and its fault problem has always been concerned by people. Among the faults of PM motors, the common and serious fault is the inter-turn short circuit (ITSC) fault. If it is not diagnosed in time, the fault will expand rapidly and cause other faults. Because of its strong destructiveness, the diagnosis of ITSC fault is crucial. In the process of fault diagnosis, fault feature extraction is a very significant link. According to the different fault feature extraction methods, the fault features in the literatures in recent years are summarized into 5 types in this paper, and fault location, fault severity detection and other evaluation indexes are also used to evaluate all fault features.