低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
SMESコイル配置の漏洩磁界
浜島 高太郎嶋田 守花井 哲和智 良裕手塚 勝高野 広久
著者情報
ジャーナル フリー

1998 年 33 巻 12 号 p. 773-781

詳細
抄録

A stray field from a superconducting coil restricts the use of SMES at a demand site, though SMES has an attractive potential for power management and quality control. The stray field outside a solenoid is analyzed by a series of Legendre polynomials, and the results are then applied to various coil configurations. The summation of magnetic moments from all coils must be zero, which leads the stray field decreasing as Rp-3 to vanish, where Rp is distance from the coil. The higher order of the stray field can be cancelled out if the coil arrangement is optimized. In this paper, we treat a single solenoid as a reference, and active shield coil, axially displaced coil, multipole coil and toroidal coil configurations to reduce the stray field. It is shown that the stray field from the active shield coil configuration decreases as Rp-7. On the other hand, the stray field from an axially displaced coil drops as a function of Rp-5. The multipole coil configuration has high potential to reduce the stray field because the stray field behaves like Rp-(n/2+3), where n is the coil number. The toroidal coil configuration has the stray field decreasing as Rp-(n+2), though it has alarge volume facility.

著者関連情報
© 社団法人低温工学協会
前の記事 次の記事
feedback
Top