Performance Analysis of a Novel Triple-Permanent-Magnet-Excited Magnetic Gear and Its Design Method

Yiduan Chen, Weinong Fu, Wei Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


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.
Original languageEnglish
Article number7393835
JournalIEEE Transactions on Magnetics
Issue number7
Publication statusPublished - 1 Jul 2016


  • Design method
  • finite element method
  • magnetic field
  • magnetic gear
  • optimization algorithm

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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