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Title: Performance analysis of a novel triple-permanent-magnet-excited magnetic gear and its design method
Authors: Chen, Y
Fu, WN 
Li, W
Keywords: Design method
Finite-element method (FEM)
Magnetic field
Magnetic gear (MG)
Optimization algorithm
Issue Date: 2016
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on magnetics, 2016, v. 52, no. 7, 8001304, p. 1-4 How to cite?
Journal: IEEE transactions on magnetics 
Abstract: This paper proposes a novel triple-permanent-magnet-excited (TPME) magnetic gear (MG) with an extra stationary layer of permanent magnets (PMs) sandwiched between adjacent ferromagnetic segments to produce an additional torque and in which a simplified consequent-pole Halback array-type PM arrangement is employed to improve the magnetic field characteristic. The novel TPME-MG has a higher torque transmission density when compared with its conventional counterpart. Its design method using the numerical finite-element method and the optimization algorithm is presented. The novel TPME-MG with optimal PM arrangement can significantly achieve higher torque density and torque per PM volume. The results of finite-element computation show that the proposed TPME-MG with optimal PM arrangement has over 74% higher torque density (torque per unit overall volume) and more than 37% higher torque per PM volume compared with a conventional surface-mounted MG, and can reach 51% higher torque density and 34% higher torque per PM volume compared with an original design of TPME-MG, which validates the effectiveness of the design method for the PM arrangement in the novel TPME-MG.
ISSN: 0018-9464
EISSN: 1941-0069
DOI: 10.1109/TMAG.2016.2522476
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