Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field

Hidehito Shimizu*, Hiroshi Ueda, Makoto Tsuda, Atsushi Ishiyama

*この研究の対応する著者

研究成果: Conference article査読

8 被引用数 (Scopus)

抄録

It is very important to clarify characteristics of trapped field in HTS bulk exposed to an external AC magnetic field in application of high-temperature superconducting bulk to motors, magnetic levitation systems, bulk magnets and so on. We have experimentally investigated the transition of trapped field while applying external AC magnetic field to a disk-shaped YBCO bulk. The observed trapped-field attenuation is different from that by flux creep, i.e., zero external field. It may be considered that the trapped-field attenuation is affected by external AC magnetic field, particularly temperature rise due to AC loss. In this paper, electromagnetic behaviors within the bulk exposed to external AC magnetic field, especially supercurrent distribution, are investigated numerically using a simulation code based on the finite element method (FEM) considering voltage-current (E-J) characteristic. We focus on the relationship between the transition of supercurrent distribution within the bulk while applying external AC magnetic field and both n-value of E-J characteristic and temperature rise by AC loss.

本文言語English
ページ(範囲)820-823
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
12
1
DOI
出版ステータスPublished - 2002 3 1
イベント17th Annual Conference on Magnet Technology - Geneva, Switzerland
継続期間: 2001 9 242001 9 28

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
  • 電子工学および電気工学

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