Influence of Different Rotor Teeth Shapes on the Performance of Flux Switching Permanent Magnet Machines Used for Electric Vehicles

Jing Zhao, Yashuang Yan, Bin Li, Xiangdong Liu and Zhen Chen
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Jing Zhao: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Yashuang Yan: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Bin Li: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Xiangdong Liu: School of Automation, Beijing Institute of Technology, Beijing 100081, China
Zhen Chen: School of Automation, Beijing Institute of Technology, Beijing 100081, China

Energies, 2014, vol. 7, issue 12, 1-20

Abstract: This paper investigated a 12-slot/11-pole flux switching permanent magnet (FSPM) machine used for electric vehicles (EVs). Five novel rotor teeth shapes are proposed and researched to reduce the cogging torque and torque ripple of the FSPM machine. These rotor teeth shapes are notched teeth, stepped teeth, eccentric teeth, combination of notched and stepped teeth, and combination of notched and eccentric teeth. They are applied on the rotor and optimized, respectively. The influences of different rotor teeth shapes on cogging torque, torque ripple and electromagnetic torque are analyzed by the 2-D finite-element method (FEM). Then, the performance of FSPMs with different rotor teeth shapes are compared and evaluated comprehensively from the points of view of cogging torque, torque ripple, electromagnetic torque, flux linkage, back electromotive force (EMF), and so on. The results show that the presented rotor teeth shapes, especially the combination of stepped and notched teeth, can greatly reduce the cogging torque and torque ripple with only slight changes in the average electromagnetic torque.

Keywords: flux switching permanent magnet (FSPM) machine; cogging torque; torque ripple; notched teeth; stepped teeth; eccentric teeth (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
References: View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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