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Permanent Magnet Eddy Current Analysis of SPM Synchronous Motors according to Magnet Shapes

  • Lee, Sun-Kwon (Korea Marine Equipment Research Institute) ;
  • Kang, Gyu-Hong (Korea Marine Equipment Research Institute) ;
  • Kim, Byoung-Woo (School of Electrical Engineering, University of Ulsan) ;
  • Hur, Jin (School of Electrical Engineering, University of Ulsan)
  • Received : 2014.10.27
  • Accepted : 2014.11.18
  • Published : 2014.12.01

Abstract

This paper presents the comparison study of permanent magnet (PM) eddy current of concentrated winding type surface permanent magnet synchronous motor (SPMSM) with different rare-earth magnet shapes. The fractional slot winding having 10 poles and 12 slots is studied. The PM eddy current is analyzed to compare for each shape by 2 dimensional (2D) finite element analysis (FEA). The eddy current and their loss of particular position of PM as well as their distributions are displayed for each model. The effect of partly enlarged air-gap made by PM shape to PM eddy current is compared.

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