Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Design of Low Power Consumption Hybrid Magnetic Bearing for Flywheel Energy Storage System

플라이휠 에너지 저장장치를 위한 저 전력소모 하이브리드 마그네틱 베어링의 설계

  • 김우연 (한국과학기술연구원 에너지메카닉스센터) ;
  • 이종민 (한국과학기술연구원 에너지메카닉스센터) ;
  • 배용채 (한국전력공사 전력연구원) ;
  • 김승종 (한국과학기술연구원 에너지메카닉스센터)
  • Received : 2010.04.28
  • Accepted : 2010.07.28
  • Published : 2010.08.20
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Abstract

For the application into a 1 kWh flywheel energy storage system(FESS), this paper presents the design scheme of radial and axial hybrid magnetic bearings which use bias fluxes generated by permanent magnets. In particular, the axial hybrid magnetic bearing is newly proposed in this paper, in which a permanent magnet is arranged in axial direction so that it can support the rotor weight as well as provide a bias flux for axial magnetic bearing. Such hybrid magnetic bearings consume very low power, compared with conventional electromagnetic bearings. In this paper, to stably support a 140 kg flywheel rotor without contact, design process is explained in detail, and magnetic circuit analysis and three-dimensional finite element analysis are carried out to determine the design parameters and predict the performance of the magnetic bearings.

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References

  1. Allaire, P. E., et al., 1990, “Permanent Magnet Biased Magnetic Bearings – Design, Construction and Testing,” Proceedings of the 2nd Int’l Symp. on Magnetic Bearings, Tokyo, Japan, July 12-14.
  2. Fukata, S. and Yutani, K., 1998, “Characteristics of Electromagnetic Systems of Magnetic Bearings Biased with Permanent Magnets,” Proceedings of the 6th Int’l Symp. on Magnetic Bearings, USA, August 5-7.
  3. No, S. K., Kim, J. S. and Choi, S. K., 1995, “PM/EM Hybrid Magnetic Bearing System for Flywheel Energy System,” Proceedings of the KSAS Annual Fall Conference, pp. 360-363.
  4. Choi, S. K., Kim, Y. C., Yoon, K. C. and Kyung, J. H., 1998, “Rotor Dynamic Design and Analysis of the Rotor-bearing System of a 500Wh Flywheel Energy Storage Device,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 8, No. 1, pp. 81-86.
  5. Kim, S.-J. and Okada, Y., 2001, “A Small Disk-type Hybrid Self-bearing Motor,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 11, No. 8, pp. 338-348.

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  2. A Study on the Design Procedure of the Eight Pole Magnetic Bearings for the Inner-rotor and the Outer-rotor Type vol.8, pp.6, 2013, https://doi.org/10.5370/JEET.2013.8.6.1424