Post-fault operation of redundant flux-switching permanent-magnet motors using harmonic injected current

The redundant flux-switching permanent-magnet (R-FSPM) motor is a new class of stator-PM brushless machines with redundancy, incorporating the merits of simple rotor structure, high reliability and high power density. Firstly, its structure characteristic and electromagnetic performance is investigated. Secondly, in order to operate the R-FSPM motor in single-channel (SC) mode for post-fault operation, a new fault-tolerant control strategy is proposed by using harmonic injected current. Comparatively, the method of doubling the current of healthy-coils is presented. Finally, both simulation and experimental results confirm that the proposed remedial strategy can maintain the average torque, and reduce the torque ripple.