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

Energies

Jin Liu¹  Wenxiang Zhao¹  Jinghua Ji¹  Guohai Liu¹  Tao Tao¹ 

[1] School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China;

关键词: finite-element method;    eddy current loss;    magnetic gear;    serial-spoke structure;    torque;    back-electromotive force;   

DOI  :  10.3390/en9110904

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown