Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
권호 표지
DOI QR코드

DOI QR Code

Optimal Design of Passive Magnetic Bearings

수동형 자기베어링의 최적 설계

  • Noh, Myoung-Gyu (Mechatronics Engineering, Chungnam National University) ;
  • Yi, Ji-Eun (BK21 Mechatronics Group, Chungnam National University) ;
  • Yoo, Seong-Yeol (BK21 Mechatronics Group, Chungnam National University)
  • 노명규 (충남대학교 메카트로닉스공학) ;
  • 이지은 (충남대학교 BK21 메카트로닉스사업단) ;
  • 유승열 (충남대학교 BK21 메카트로닉스사업단)
  • Published : 2007.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Permanent-magnet (PM) passive bearings use the repulsive forces between the rotor and the stator magnets for the bearing function. It is desirable that the stiffness of the bearing is maximized with the given volume of the magnet. The stiffness is affected by the magnet strength, the number of layers, and the magnetization patterns. Previously, finite-element method (FEM) has been used to maximize the stiffness of the bearing. In this paper, we used the equivalent current sheet method to calculate the stiffness. The validity of this approach is checked against FEM results. The optimized bearing is applied to a micro flywheel energy storage system.

Keywords

References

  1. F. T. Backers, 'A Magnetic Journal Bearing,' Philips Technical Review, Vol. 22, pp. 232-238, 1960
  2. R. Moser, J. Sandtner and H. Bleuler, 'Optimization of Repulsive Passive Magnetic Bearings,' IEEE Transactions on Magnetics, Vol. 42, No.8, pp. 2038-2042, 2006 https://doi.org/10.1109/TMAG.2005.861160
  3. B. Paden, N. Groom and J. F. Antaki, 'Design formulas for Permanent-magnet Bearings,' Transactions of the ASME, Vol. 125, pp. 734-738, 2003 https://doi.org/10.1115/1.1625402
  4. J. -P Yonnet, G Lemarquand, S. Hemmerlin and E. Olivier-Rulliere, 'Stacked Structures of Passive Magnetic Bearings,' American Institute of Physics, Vol. 70, No. 10, pp. 6633-6635, 1991
  5. C. Chen et. al., 'A Magnetic Suspension Theory and Its Application to the HeartQuest Ventricular Assist Device,' Artificial Organs, Vol. 26, No. 11, pp. 947-951, 2002 https://doi.org/10.1046/j.1525-1594.2002.07125.x
  6. S. Earnshaw, 'In the Nature of Molecular Forces which Regulate the Constitution of the Luminiferous Ether,' Cambridge Philosoph. Trans., Vol. 7m, pp. 97-112, 1842
  7. M. D. Noh, et.al., 'Magnetic Levitation for the Pediaf'low' Ventricular Assist Device,' Advanced Intelligent Mechatronics, 2005
  8. S. Yoo, J. Yi and M. D. Noh, 'Design of Micro Flywheel Energy Storage System,' ICMDT2007, Sapporo, Japan, July 1-3, 2007