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

作者：Liu, Jin; Zhao, Wenxiang^*; Ji, Jinghua; Liu, Guohai; Tao, Tao

来源：Energies, 2016, 9(11): 904.

DOI：10.3390/en9110904

• finite-element method
• eddy current loss
• magnetic gear
• serial-spoke structure
• torque
• back-electromotive force

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.

• 出版日期2016-11
• 单位江苏大学