The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of Fan-shape Type PMSM for Improving Efficiency of Non-rare Earth Motor

비희토류 전동기의 효율 향상을 위한 Fan-shape type PMSM 설계 및 성능 분석

  • Cho, Sooyoung (Dept. of Electrical Engineering, Hanyang University) ;
  • Ahn, Hanwoong (Dept. of Electrical Engineering, Hanyang University) ;
  • Ham, Sang-Hwan (Dept. of Electrical and Railway Engineering, Kyungil University) ;
  • Jin, Chang-Sung (Defense Robot Team, Defense Business Unit, Hanwha Techwin) ;
  • Lee, Sung Gu (Dept. of ICT Creative Design, Graduate school, Busan University of Foreign Studies) ;
  • Lee, Ju (Dept. of Electrical Engineering, Hanyang University)
  • Received : 2015.11.10
  • Accepted : 2016.01.18
  • Published : 2016.02.01
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Abstract

The rare earth output is concentrated in limited number of countries including China. Also the necessity for development of non-rare earth motor is getting signified due to the rapid increase of rare earth price and resource weaponizing policies. Non-rare earth motor is generally designed as spoke type PMSM (Permanent Magnet Synchronous Motor) in order to maximize the power density. Such spoke type PMSM has advantage in concentrating the flux but demonstrates lower efficiency compared to permanent magnet using Nd (Neodymium) permanent magnet. Therefore, applications with strong necessity for efficiency need rotor structure having improved efficiency compared to spoke type PMSM. Hence, this study suggested fan-shape type PMSM with somewhat lower power density but maximized efficiency. Fan-shape type PMSM is a rotor shape demonstrating outstanding reduction of iron loss compared to existing spoke type. Thus, this study analyzed the improvement of efficiency and reduction of loss arising from the suggested shape through parameter calculation.

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References

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