Qingzhi Zhu and Lin Xu
Electromagnetic property, flux switching motor, mechanical method, permanent magnet synchronous motor, variable magnetic field
The air-gap flux of flux-switching permanent synchronous motor is constant, so the electric vehicle driven by ordinary flux-switching permanent synchronous motor has the disadvantages of narrow speed range and low output torque. The novel flux adjustable flux-switching permanent synchronous motor by mechanical method is proposed to overcome the above shortcomings. The structure and magnetic field regulation principle of the flux-switching permanent synchronous motor is introduced and analysed. The changing discipline of magnetic density distribution, flux linkage, back electromotive force, and electric torque are obtained based on the finite element method. The change of electromagnetic characteristics at different operating speeds shows that the flux-switching permanent synchronous motor has good magnetic weakening characteristics, which can promote output torque at low speed and broaden the operation range at high speed of electric vehicle.
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