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Cogging Torque Optimization of Flux-Switching Transverse Flux Permanent Magnet Machine

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6 Author(s)
Jianhu Yan ; Eng. Res. Center for Motion Control of Minist. of Educ., Southeast Univ., Nanjing, China ; Heyun Lin ; Yi Feng ; Zhu, Z.Q.
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In this paper, cogging torque characteristics in both single-phase and three-phase flux switching transverse flux permanent magnet machines (FS-TFPMM) are analyzed by 3-D finite element method (FEM). It is found that the cogging torque of the FS-TFPMM is significantly influenced by the ratios of stator and rotor core circumferential widths to pole pitch, ks and kr. When kr > 1-ks, the cogging torque waveform has additional two zero-crossing points, whilst its amplitude is significantly reduced. The optimal ratios of ks and kr are selected to reduce the cogging torque and to maximize the permanent magnet flux linkage. A 380 W three-phase prototype is designed, manufactured, and tested to verify the optimization.

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Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 5 )