Superconducting magnetic bearing for a flywheel energy storage system using superconducting coils and bulk superconductors

K. Nagashima, H. Seino, N. Sakai, M. Murakami

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Stable levitation or suspension of a heavy object in mid-air can be realized using a combination of a permanent magnet and a bulk superconductor with high critical current density, in that the force density has reached 100 kN/m2. The superconducting flywheel system for energy storage is attractive due to a great reduction in the rotational loss of the bearings. So long as a permanent magnet is used as a magnetic source, however, the electromagnetic force (EMF) is essentially limited by its field strength. In order to overcome such a limitation, we employed a superconducting coil/magnet as a magnetic source and studied the EMF characteristics of bulk superconductors in high-magnetic fields. We also measured the EMF between a bulk superconductor and a specially designed superconducting coil having a high field gradient, and confirmed that the EMF reached 9450 N (force density: 2507 kN/m2).

本文言語English
ページ(範囲)1244-1249
ページ数6
ジャーナルPhysica C: Superconductivity and its applications
469
15-20
DOI
出版ステータスPublished - 2009 10 15

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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