Design and Analysis for Loss Reduction of High-Speed Permanent Magnet Motor using a Soft Magnetic Composite

  • Lee, Sung-Ho (Seonam Regional Division, Korea Institute of Industrial Technology) ;
  • Kim, Yong-Jae (Department of Electrical Engineering, Chosun University) ;
  • Lee, Kyu-Seok (Seonam Regional Division, Korea Institute of Industrial Technology) ;
  • Kim, Sung-Jin (Seonam Regional Division, Korea Institute of Industrial Technology)
  • Received : 2015.10.01
  • Accepted : 2015.11.09
  • Published : 2015.12.31


Soft magnetic composites (SMCs) are especially suitable for the construction of low-cost, high-performance motors with 3-D magnetic fields. The main advantages of SMCs is that the iron particles are insulated by the surface coating and adhesive used for composite bonding, the eddy-current loss is much lower than that in laminated steels, especially at higher frequencies, and the hysteresis loss becomes the dominant component of core losses. These properties enable machines to operate at higher frequencies, resulting in reduced machine size and weight. In this paper, 3-D topologies are proposed that enable the application of SMCs to effectively reduce losses in high-speed permanent magnet (PM) motors. In addition, the electromagnetic field characteristics of the motor topologies are evaluated and compared using a non-linear finite element method (FEM) based on 3-D numerical analysis, and the feasibility of the motor designs is validated.


Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)


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