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

Author

Jianhu Yan ; Heyun Lin ; Yi Feng ; Zhu, Z.Q. ; Ping Jin ; Yujing Guo

Author_Institution

Eng. Res. Center for Motion Control of Minist. of Educ., Southeast Univ., Nanjing, China

Volume

49

Issue

5

fYear

2013

fDate

May-13

Firstpage

2169

Lastpage

2172

Abstract

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.

Keywords

finite element analysis; optimisation; permanent magnet machines; rotors; stators; 3D finite element method; cogging torque characteristics; cogging torque optimization; cogging torque waveform; flux-switching transverse flux permanent magnet machine; permanent magnet flux linkage; pole pitch; power 380 W; rotor core circumferential widths; stator core circumferential widths; zero-crossing points; Cogging torque; flux switching; permanent magnet; transverse flux;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2244855

Filename

6514691