Fabrication and evaluation of superconducting magnetic bearing for 10 kW h-class flywheel energy storage system

T. Ichihara, K. Matsunaga, M. Kita, I. Hirabayashi, M. Isono, M. Hirose, K. Yoshii, K. Kurihara, O. Saito, S. Saito, M. Murakami, H. Takabayashi, M. Natsumeda, N. Koshizuka

研究成果: Conference article査読

19 被引用数 (Scopus)

抄録

Radial-type superconducting magnetic bearings (SMB) have been developed for a 10 kW h-class flywheel energy storage system. The bearings consist of an inner-cylindrical stator composed of YBCO bulk superconductors and an outer-rotor composed of permanent magnets. The rotor is suspended without contact using the pinning forces of the bulk superconductors. After construction of the whole system, various tests on both static and dynamic characteristics of the SMB were carried out to confirm that the SMB has sufficient performance for 10 kW h-class flywheel systems. Besides, the bearing rotation loss was measured. In this paper, we describe the implementation of the stator part and report the SMB test results, namely that the rotor was successfully suspended up to 7500 rpm. Thus we succeeded in the energy storage of 2.24 kW h. The rotation loss of the SMB was estimated as 40 W at 7500 rpm, which was mainly caused by the inhomogeneous magnetic field of the bulk superconductors.

本文言語English
ページ(範囲)752-758
ページ数7
ジャーナルPhysica C: Superconductivity and its applications
426-431
I
DOI
出版ステータスPublished - 2005 10月 1
外部発表はい
イベントProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
継続期間: 2004 11月 232004 11月 25

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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