Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis of Cogging Torque in BLDC Motor Taking into account Magnetization Distribution Using 3DEMCN

3차원 등가자기회로망법을 이용한 영구자석의 자화분포에 따른 BLDC 모터의 코깅 토오크 해석

  • Hwang, D.Y. (Dept. of Electrical Eng. Hanyang Univ.) ;
  • Hur, J. (Dept. of Electrical Eng. Hanyang Univ.) ;
  • Yoon, S.B. (Dept. of Electrical Eng. Hanyang Univ.) ;
  • Hong, J.P. (Dept. of Electrical Eng. Changwon Univ.) ;
  • Hyun, D.S. (Dept. of Electrical Eng. Hanyang Univ.)
  • 황동윤 (한양 대학교 전기 공학과) ;
  • 허진 (한양 대학교 전기 공학과) ;
  • 윤상백 (한양 대학교 전기 공학과) ;
  • 홍정표 (창원 대학교 전기 공학과) ;
  • 현동석 (한양 대학교 전기 공학과)
  • Published : 1997.07.21
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Abstract

This paper presents a method of reducing cogging torque and improving average torque by changing the dead zone angle of trapezoidal magnetization distribution of rotor magnet in ring type. Because brushless d.c. motor has 3D shape of overhang, 3D analysis should be used for computation of its magnet field. In this paper, Three Dimensional Equivalent Magnetic Circuit Network method (3DEMCN) which can calculate an accurate 3D magnetic field has been introduced. The method has an advantage that nonlinear magnetic phenomena can be considered and the cogging torque analyses requesting the rotation of the rotor can be performed by the variation of magnetization distribution without remesh.

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