Empirical study of a current-distribution control type advanced superconducting conductor

电流分布控制型先进超导导体的实证研究

• 批准号: 12450116
• 负责人: MITO Toshiyuki
• 金额: $ 6.66万
• 依托单位: Natiomal Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450116/
• 关键词: Superconductor; ACLoss; Current distribution; Stability; Lage-scale applied superconductivity; Eusion; Cable; SMES

In the superconducting conductor which cannot control a current distribution and the contact resistance between strands like a cable-in-conduit conductor (CICC), the event, which is not assumed at the time of a design, may occur such as an enhancement of AC loss by the coupling current ofa long time constant etc. It makes difficult quantitive grasp of a conductor and coil performance. This is because the current distribution in a conductor is not controllable. We have performed development research of the conductor which controlled the current distribution in a conductor. The compacted strand cable to which the position and orbital of each strand clarified is easy to control the current distribution in a conductor, and a design of the conductor which reconciled the AC loss and the stability is possible for it by optimizing the electric-potential distribution in a conductor. First, by lengthening the twist pitch of a strand, the electromotive force in the strand by the alternating-curre … More nt magnetic field and the electromotive force of a stranded cable were canceled. The prototype conductor which reduces a total AC loss has been manufactured. The AC loss was actually measured, and the effect was proved. However, it is necessary to gather a compacted strand cable and to give mechanical reinforcement etc., in order to consider as the conductor of large-sized superconducting coils, such as a nuclear-fusion experimental device. Moreover, in the case of a conduction cooled type coil, in order to stop the coil femperature rise at the time of pulse operation, it is necessary to consider as the conductor of the high specific heat which gave the specific heat to fractions other than a forming stranded wire. The conductor which extrudes a compacted strand cable with low purity aluminum really builds as an example which gathers a forming stranded cable. The conductor constitutes a large-sized conductor with circular cross-sectional shape. By the twisted winding of a conductor so that a magnetic field may be added in parallel with the broad side of a compacted strand cable in this conductor showed that the AC loss as a coil could be reduced sharply, From these experiments and the analysis result, the current distribution in a conductor was controlled and the design technique ofa superconducting conductor in which the low AC loss and the high stability were reconciled was established. Less

在不能控制电流分布和股线之间的接触电阻的超导导体中，如CICC（cable-in-conduit conductor），可能发生在设计时未假设的事件，诸如由长时间常数的耦合电流引起的AC损耗的增强等。这使得难以定量地掌握导体和线圈性能。这是因为导体中的电流分布是不可控制的。我们对控制导体中电流分布的导体进行了开发研究。每个股线的位置和轨道明确的紧凑股线电缆易于控制导体中的电流分布，并且通过优化导体中的电势分布来协调AC损耗和稳定性的导体的设计是可能的。首先，通过延长股线的捻距，由交流电流引起的股线中的电动势被减小。 ...更多信息 NT磁场和绞合电缆的电动势被抵消。研制出了降低交流总损耗的原型导线。实际测量了交流损耗，验证了效果。然而，有必要聚集压实的绞合缆线并给予机械加固等，以考虑作为诸如核聚变实验装置的大型超导线圈的导体。此外，在传导冷却型线圈的情况下，为了在脉冲操作时停止线圈温度上升，需要考虑将比热赋予形成绞线以外的部分的高比热导体。挤压具有低纯度铝的压实绞合电缆的导体实际上构建为聚集成形绞合电缆的示例。导体构成具有圆形横截面形状的大尺寸导体。通过对导体进行绞合绕组，使磁场与压缩绞合电缆的宽边平行地施加在该导体上，表明作为线圈的交流损耗可以大大降低。从这些实验和分析结果来看，控制导体中的电流分布，协调低交流损耗和高稳定性的超导导体的设计技术，确立了习少

项目成果

F.Sumiyoshi, S.Kawabata, A.Kawagoe, T.Kawashima, N.Hirano, T.Mito, A.Iwamoto, T.Satow: "Development of a New Type Superconducting Conductor with High Stability and Low Losses"Annual Report of National Institute for Fusion Science. April 1999-March 2000. 1

F.Sumiyoshi、S.Kawabata、A.Kawagoe、T.Kawashima、N.Hirano、T.Mito、A.Iwamoto、T.Satow：《开发高稳定性、低损耗的新型超导导体》年度报告

A.Kawagoe, F.Sumiyoshi, M.Nakanishi, T.Mito, K.Kawashima: "Development of a New Type Superconducting Conductor with High Stability and Low Losses"Presented at ASC 2002, August 4-9, 2002, Houston, Texas USA, to be Dublished on Transaction on Arrnlied Super

A.Kawagoe、F.Sumiyoshi、M.Nakanishi、T.Mito、K.Kawashima：“开发具有高稳定性和低损耗的新型超导导体”于 2002 年 8 月 4-9 日在德克萨斯州休斯敦举行的 ASC 2002 上发表

川越明史, 中西誠, 住吉文夫, 川島照子, 二戸利行: "低損失で高安定な超電導パルスコイル用導体の交流損失特性"電気学会超電導応用電力機器研究会資料. ASC-02-44. 7-10 (2002)

Akifumi Kawagoe、Makoto Nakanishi、Fumio Sumiyoshi、Teruko Kawashima、Toshiyuki Ninohe：“低损耗和高度稳定的超导脉冲线圈导体的交流损耗特性”IEEJ 超导应用电力设备研究组材料。 ）

川越明史, 志摩宣彦, 住吉文夫, 川島照子, 三戸利行: "低損失で高安定な捻り角制御型超電導導体の開発(2)"電気学会超電導応用電力機器・リニアドライプ合同研究会資料. ASC-02-21. 31-35 (2002)

Akifumi Kawagoe、Nobuhiko Shima、Fumio Sumiyoshi、Teruko Kawashima、Toshiyuki Mito：“低损耗、高稳定性扭转角控制超导导体的开发(2)”材料来自 IEEJ 超导应用电力设备和线性驱动联合研究组。 ASC-02-21。31-35（2002）

A.Kawagoe, F. Sumiyoshi, M. Nakanishi, T. Mito, K. Kawashima: "Development of a New Type Superconducting Conductor with High Stability and Low Losses."refastened at ASC 2002, August 4-9, 2002, Houston, Texas USA, to be published on Transaction on Applied

A.Kawagoe、F. Sumiyoshi、M. Nakanishi、T. Mito、K. Kawashima：“开发具有高稳定性和低损耗的新型超导导体。”于 2002 年 8 月 4-9 日在休斯顿举行的 ASC 2002 会议上重新固定