Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Characteristic Analysis of Brushless DC Motor Using FEM

유한요소법을 이용한 브러시레스 DC 모터의 특성 해석에 관한 연구

  • Cheong, Shin-Young (Dept. of Electrical and Computer Engineering, Hanyang University) ;
  • Song, Yu-Seok (Dept. of Electrical and Computer Engineering, Hanyang University) ;
  • Lee, Ju (Dept. of Electrical and Computer Engineering, Hanyang University) ;
  • Jang, Seok-Joong (Jungsim Electronics Co., Ltd.) ;
  • Park, Geon-Hee (Jungsim Electronics Co., Ltd.)
  • 정신영 (한양대학교 전자전기컴퓨터공학부) ;
  • 송유석 (한양대학교 전자전기컴퓨터공학부) ;
  • 이주 (한양대학교 전자전기컴퓨터공학부) ;
  • 장석중 (정심전자(주)) ;
  • 박건희 (정심전자(주))
  • Published : 2002.07.10
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Abstract

This paper investigates the cogging torque reduction in a brushless DC(BLDC) motor having an inner-rotor with surface-mounted segment-type permanent magnets. The kind of magnets for the BLDC motor could have different waveforms of magnetization such as square, trapezoidal and sinusoidal form. This paper discusses the effect of the unsymmetrical magnetization distribution in the segment-type permanent magnet, which is able to obtain through a segment structure that the number of poles per segments is 2 ($N_p/N_s$), on the cogging torque and EMF waveform. Where the existing magnetizer fixture for the square-type magnetization is used to magnetize the magnets in two segment structures of $N_p/N_s$ = 1 and 2. The effectiveness of the proposed designs had been confirmed by comparing cogging torque, and EMF waveform between conventional and new models which are analyzed by Finite Element Method (FEM).

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