考虑反电动势2次谐波的容错型磁通切换电机开路及短路故障控制策略

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Abstract Fault tolerant flux switching permanent magnet motor (FTFSPMM) not only maintains relatively high torque density and robust rotor structure, but also possesses excellent fault-tolerant capability. This paper studies fault-tolerant control strategy for the fault-tolerant operation. When the open-circuit fault occurs,taken into account the second harmonic back-EMF, amplitudes and phases of the healthy phases are adjusted to maintain constant instantaneous power and reduce the torque ripple. Under the short-circuit fault, according to the measured short-circuit current, the back-EMF of the fault phase can be obtained considering the inductance and resistance. The torque ripples can be decomposed into those arising from the normal current and those from the short-circuit current that acts on the inductance and resistance of the fault phase. The current of healthy phases can be obtained by synthesizing the current for compensation for torque ripple caused by inductance and resistance. Experiments on the prototype machine verify the fault-tolerant control strategy.

Key words： Fault tolerant flux switching permanent magnet motor fault-tolerant fault decom- position instantaneous power fundamental compensation

Received: 15 May 2014 Published: 28 July 2016

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TM351

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I14/130

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