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Control and operation of fault-tolerant flux-switching permanent-magnet motor drive with second harmonic current injection

Control and operation of fault-tolerant flux-switching permanent-magnet motor drive with second harmonic current injection

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This study investigates the operations of a recently developed fault-tolerant flux-switching permanent-magnet (FT-FSPM) brushless motor, in which the concentrated coils of each stator phase are wound on alternate teeth and permanent-magnets (PMs) are located in the stator, offering a number of significant advantages over conventional PM brushless machines, such as simpler rotor structure, easier cooling in PMs and independence of phases. The control strategy of the FT-FSPM motor is proposed for torque ripple minimisation, in which the key is to introduce harmonic currents to compensate for non-ideal sinusoidal back-electromotive force (EMF). Both simulation and experimental results confirm that the proposed control algorithms can reduce torque ripple and offer good dynamic performance under normal and fault conditions. Hence, it can be concluded that the developed motor drive system is suitable for applications where reliability, efficiency and power density are of importance in such applications as electric and hybrid electric vehicles.


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      • Thomas, A.S., Zhu, Z.Q., Jewell, G.W.: `Comparison of flux switching and surface mounted permanent magnet generators for aerospace applications', Proc. Int. Conf. on Power Electrcal Machines and Drives, April 2010, Brighton, UK, p. 1–5.
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