A Novel Flux Focusing Magnetically Geared Machine with Reduced Eddy Current Loss

Jin Liu, Wenxiang Zhao, Jinghua Ji, Guohai Liu and Tao Tao
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Jin Liu: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Wenxiang Zhao: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Jinghua Ji: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Guohai Liu: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Tao Tao: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China

Energies, 2016, vol. 9, issue 11, 1-15

Abstract: This paper proposes a novel flux focusing magnetically geared (MG) machine for wind power generation, considering the permanent magnets (PMs) eddy current loss and the balance between the pull-out torque of MG machine and the back-electromotive force (EMF)of the PM brushless machine. The PM eddy current loss in the two rotors of the conventional surface-mounted MG machine is calculated and analyzed by using finite-element method. By adopting serial-spoke structure in the inner rotor, a novel rotor structure for a MG machine is proposed to reduce the PM eddy current loss. Moreover, in order to balance the pull-out torque and the back-EMF, several serial-spoke structures and the main design parameters are investigated. Then, a quantitative comparison between the proposed topology and the conventional surface-mounted MG machine is performed. The analysis results indicate that the PM eddy current loss of the proposed MG machine can be significantly reduced and its pull-out torque and back-EMF can be balanced well.

Keywords: finite-element method; eddy current loss; magnetic gear; serial-spoke structure; torque; back-electromotive force (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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