Journal of Institute of Convergence Technology (융복합기술연구소 논문집)

Institute of Convergence Technology (한국교통대학교 융복합기술연구소)
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Analysis of Force Characteristic according to Repeated Shape Changes of Magnetic Gear

자석 기어의 반복 형상 변경에 따른 자기력 특성 해석

  • Sangheon Lee (Department of Robotics Engineering, Gyeongkuk National University) ;
  • Kwangsuk Jung (Department of Mechanical Engineering, Korea National University of Transportation)
  • 이상헌 (국립경국대학교 로봇공학과) ;
  • 정광석 (국립한국교통대학교 기계자동차항공공학부 기계공학전공)
  • Received : 2025.10.13
  • Accepted : 2025.11.17
  • Published : 2025.11.30
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Abstract

The individual permanent magnets of a typical magnetic gear are fan-shaped. When the shape is fan-shaped, the path length of the closed magnetic circuit formed from the high-speed side to the low-speed side is the shortest, and therefore the magnetic torque value is also the largest in that case. In this paper, when the repetitive shape of the magnetic gear is not fan-shaped, we analyze the magnetic force change characteristics and eddy current loss or solid loss due to pole switching. Using a finite element commercial tool, we analyze that these losses can be reduced by reducing the rapid magnetic changes of the magnet and modulator by configuring the fan shape to be inclined in the direction of rotation. Additionally, it is discussed through harmonic analysis that there is no significant change in the torque density generated.

Keywords

Acknowledgement

2025년 국립한국교통대학교 지원을 받아 수행하였음.

References

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