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Abstract
The magnetic gear (MG) is an emerging technology that has been proved to possess superior performance over the conventional mechanical gear in many aspects. However, the existing markets of traditional mechanical gears have not yet been replaced by MGs. One of the major reasons is that MGs are susceptible to the permanent magnet (PM) materials, which are scarce and expensive, while mechanical counterparts are impervious to that. To solve such issues, the comparative studies of various designs of triple-layer PM-excited MGs are carried out to find out the optimal torque per unit PM volume design. The methodology of the Tabu algorithm is coupled with the finite element method (FEM) to search out the optimal solution of MGs.
Highlights
Limited by the frictional loss and low efficiency, conventional mechanical gears have gradually been substituted by emerging magnetic gears (MGs) in the last decade [1,2]
Inspired by MGs, many permanent magnet (PM) machines integrated with MGs have been proposed and proven to produce a higher torque density than the conventional PM machines [4,5,6]
Five novel triple-layer PM-excited MGs with various PM arrays in the inner rotor are proposed in this article
Summary
Limited by the frictional loss and low efficiency, conventional mechanical gears have gradually been substituted by emerging magnetic gears (MGs) in the last decade [1,2]. The motivation of this paper is to fill in this gap to further increase the torque per unit PM volume of MGs. Five novel triple-layer PM-excited MGs with various PM arrays in the inner rotor are proposed in this article. In the designs of MGs, transmitted torque should be maximized, and PM material utilization should control variate method is used, such that the PM utilization is fixed in several different volumes, be minimized, which are tradeoffs and required optimization. The control variate method and the structures of different types of MGs are optimized and compared. To show the advantages is used, such that the PM utilization is fixed in several different volumes, and the structures of different of the proposed MGs, comparative studies among proposed designs and the conventional design types of MGs are optimized and compared. Studies among proposed designs and the conventional design are carried out
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