Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Novello, L.*; Cara, P.*; Coletti, A.*; Gaio, E.*; Maistrello, A.*; 松川 誠; Philipps, G.*; Tomarchio, V.*; 山内 邦仁
IEEE Transactions on Applied Superconductivity, 26(2), p.4700507_1 - 4700507_7, 2016/03
被引用回数:7 パーセンタイル:39.48(Engineering, Electrical & Electronic)The voltage transient appearing across and inside the toroidal field (TF) coils of JT-60SA in case of fast voltage variation, such as a safety discharge operated by the quench protection circuit (QPC), can be significantly high. In fact, the voltage distribution between coils and inside the winding can be not uniform during fast transient, being influenced by the presence of parasitic capacitances. A simplified electrical model of the TF coils has been developed to investigate this aspect. The obtained model has been used in conjunction with an electrical model of the TF circuit elements, including a simplified model of the QPC. The worst case in terms of transient voltage applied to the winding has been identified, corresponding to a fault to ground occurring just after QPC operation. It has been verified that the resulting voltage is largely inside the coil insulation capability defined by performed insulation voltage tests.
大森 順次*; 荒木 政則
JAERI-Tech 2000-006, p.15 - 0, 2000/02
低コストITER(IAM-v2)の真空容器とバックプレートは、電磁力、地震荷重、熱荷重等の負荷を受けるので、これらの負荷に対して、構造の健全性を保つことが要求される。本報告書では、真空容器とバックプレートのインボード側壁に最も高い圧縮力が作用するトロイダルコイルの高速放電時の荷重に対し、弾性、塑性の座屈評価を行った。弾性の座屈評価では、限界圧力が塑性を生ずる圧力より十分大きいため、弾性範囲内では座屈は起こらない。バックプレートの支持脚についても座屈は生じない。また、塑性座屈については、形状の幾何学的なずれとして10mmを考慮しても、座屈圧力は基準値以下である。したがって、真空容器とバックプレートについて座屈の問題はない。