Browse > Article

Permanent Magnet Overhang Effect on the Characteristics in Brushless DC Motor  

전연도 (한양대 BK21기계분야)
약미진치 (일본 조도전대학 이공학부 전기.정보생명공학과)
이주 (한양대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.53, no.4, 2004 , pp. 229-236 More about this Journal
Abstract
In this paper, the effect of permanent magnet overhang structure on the characteristics in Brushless DC motor has analyzed quantitatively. We classified the overhang structure as symmetric and asymmetric. 3D equivalent magnetic circuit network (EMCN) method which uses the permeance as the distributive variable is used for the efficient analysis of magnetic field. The overhang effect which increases the linkage flux at the stator is verified by comparison between overhang and no overhang structure. In addition, it is known that no load back electro motive force (EMF) is also increased due to the overhang effect. In case of asymmetric overhang structure, the ratio effect of the upper to lower overhang length on the magnetic forces is analyzed. Form the analysis results, the variation of the asymmetric overhang ratio has a significant effect on the axial magnetic force except the radial and tangential magnetic forces. The validity of the analysis results is also clarified by comparison between calculated results and measured ones such as back EMF and cogging torque.
Keywords
Permanent Magnet; Overhang Structure; Brushless DC motor; 3D Equivalent Magnetic Circuit Network Method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 T. K. Lin, Y. H. Chang, H. C. Huang, S. J. Wang, T. F. Ying, and D. R. Huang, 'The dynamic performance affected by the axial magnetic force for a DVD spindle motor,' Journal of Magnetism and Magnetic Materials, vol. 209, pp. 183-185, Feb., 2000   DOI   ScienceOn
2 J. Hur, Y. D. Chun, J. Lee and D. S. Hyun, 'Dynamic analysis of radial force density in brushless DC motor using 3 dimensional equivalent magnetic circuit network method,' IEEE Trans. on Magn., vol. 34, no. 5, pp. 3142-3145, Sep., 1998   DOI   ScienceOn
3 임달호, 홍정표, '3차원 등가자기회로방법에 의한 영구자석 모터의 자계 해석,' 대한전기학회논문지, vol. 43, no, 9, pp. 1432-1439, 1994
4 Y. D. Chun, J. Lee and S. Wakao, 'Overhang effect analysis of brushless DC motor by 3D equivalent magnetic circuit network method,' IEEE Trans. on Magn., vol. 39, no. 5, pp. 1610-1613, May, 2003   DOI   ScienceOn
5 I. S. Jung, J. Hur and D.S.Hyun, 'Performance analysis of skewed PM linear synchronous motor according to various design parameters,' IEEE Trans. on Magn., vol.37, no.5, pp. 3653-3657, Sep., 2001   DOI   ScienceOn
6 전연도, 허진, 홍정표, 이주, 현동석, '3차원 등가자기회로망법을 이용한 브러시레스 DC 모터의 코깅토크 저감에 관한 연구', 대한전기학회 논문지, 제47권, 제 12호, pp. 2101-2107, 1998
7 Y. H. Kim, C.S. Jin, S. Kim, Y. D. Chun and J. Lee, 'Analysis of hybrid stepping motor using 3D equivalent magnetic circuit network method based on trapezoidal element,' Journal of Applied Physics, vol. 91, no. 10, pp. 8311-8313, May, 2002   DOI   ScienceOn
8 J. Hur, D. S. Hyun, S. S. Kim, G. H. Kang and J. P. Hong, 'Three dimensional eddy current calculation using magnetic scalar potential in conducting regions,' Journal of Applied Physics, vol. 91, no. 10, pp. 8314-8316, May, 2002   DOI   ScienceOn
9 G. H. Jang and J. W. Yoon, 'Three dimensional analysis of magnetic force and torque in a BLDC motor due to the axial variation of yoke and pole,' IEEE Trans. on Magn., vol. 35, no.5, pp. 3694-3696, Sep., 1999   DOI   ScienceOn
10 양병렬, 권병일, 박승찬, '단상 BLDC 전동기의 토오크 리플 저감을 위한 공극 설계,' 대한전기학회논문지, 제51B권, 제2호, pp. 49-54, 2002   과학기술학회마을
11 Y. D. Chun, S. Wakao and J. Lee, 'Magnetic force characteristics according to the variation of asymmetric overhang ratio in brushless direct current motor,' Journal of Applied Physics, vol. 92, no. 10, pp. 8775-8777, 2003   DOI   ScienceOn
12 河瀨 順洋, 山口 忠, 大野 友寬, '三次元有限要素法によろ薄形氷久磁石回轉機のコギングトルク解析,' 日本電氣學會 靜止器, 回轉機合同硏究會資料, SA-01-35, RM-01-103, pp. 85-90, 2001
13 J. P.Wang, D. K. Lieu, W. L. Lorimer and A. Hartman, 'Influence of the permanent magnet overhang on the performance of the brushless dc motor,' Journal of Applied Physics, vol. 83, no. 11, pp. 6362-6364, 1998   DOI   ScienceOn