Fault-Tolerant Control of PMSM With Inter-Turn Short-Circuit Fault
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abstract
Due to its high-torque density and high efficiency, the Permanent Magnet Synchronous Motor (PMSM) is widely used in a broad range of applications. Extensive work has been presented in the literature related to modeling, fault diagnosis and fault tolerant (FT) control of electric drive system. On the other hand, because of higher requirements in industry, higher performance is always expected with implementation of new structure, new fault detection and new control method. In this background, the author proposed diagnosis method with a novel objective, identification of fault degree instead of fault isolation. Based on this concept, a new FT control based on fault degree information is proposed to optimize post-fault performance. The diagnosis and FT control can be applied on PMSM with inter-turn short circuit (SC). Its theoretical base and practical performance are presented and its strength over previous methods are come up with.
