Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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The Research on the Characteristics of Brush less DC Motor according to the Shape of the Permanent Magnet

브러시리스 DC 모터의 영구자석 형상에 따른 특성 연구

  • Park., C. (Dept. of Electronic and Electrical Engineering, Hanyang University) ;
  • Kim, Y.H. (Dept. of Electronic and Electrical Engineering, Hanyang University) ;
  • Lee, J.C. (Dept. of Electronic and Electrical Engineering, Hanyang University) ;
  • Chun, Y.D. (Dept. of Electronic and Electrical Engineering, Hanyang University) ;
  • Lee, J. (Dept. of Electronic and Electrical Engineering, Hanyang University)
  • 박찬 (한양대학교 전자전기공학부) ;
  • 김용현 (한양대학교 전자전기공학부) ;
  • 이종찬 (한양대학교 전자전기공학부) ;
  • 전연도 (한양대학교 전자전기공학부) ;
  • 이주 (한양대학교 전자전기공학부)
  • Published : 2001.07.18
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Abstract

The cogging torque and torque ripple in motor which cause noise and vibration are an inevitable phenomenon and they give a bad effect to motor performance. So we are required to reduce the cogging torque and torque ripple not by electrical controlling but by changing the inner mechanical structure and we focused on the permanent magnet. In this research, we calculated current, torque, Back-EMF(electromotive force) and cogging torque according to the change of the magnet shape using two dimensional FEM(Finite Element Method). Maxwell stress tensor and time-stepping method. From the results, we present an appropriate model that can satisfy both low cogging torque, low torque ripple and high efficiency.

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