权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Evelopment of a Highly-stable Superconductor with Controlled Current Distribution

具有受控电流分布的高稳定超导体的开发

基本信息

批准号：
09450117
负责人：
MITO Toshiyuki
金额：
$ 4.48万
依托单位：
National Institute for Fusion Science (NIFS)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450117/
关键词：
superconductor strand cable current distribution current sharing AC loss stability superconducting coil nuclear fusion 超伝導導体大型超伝導コイル

项目摘要

We have studied the effects of the ununiform current distribution in the superconducting cab le to stability as a preceded research work. When maintaining the current transfer characteristic between strand cable beyond the reference value with which exoergic in a current transfer part does not worsen a stability, even if the ununiform current arose in between strands, it was shown that the affection on a stability is small. The above-mentioned research result was received and development research of the conductor of the high stability which controlled the current distribution in a conductor was performed. The current distribution in a conductor was controlled and development research of the superconducting conductor of the stranded-cable architecture of reconeiling insurance of a high stability and the reduction of an AC loss was performed. First the current distribution in a conductor and the relation of an AC loss were devised. It is reported by the low-frequency area near an operati … More on frequency from the measurement result of the AC loss of the large-scale supercondueting coil using the cable-in-conduit conductor that an AC loss increases, It is considered as the new factor which obstructs utilization of a large-scale superconducting coil and investigation of the possible cause was hurried. In this research, the element experiment using 2 stranded cables was performed based on the estimate that it is the cause that the ununiformity of the current distribution in a stranded-cable conductor varies to a conductor longitudinal. It was shown that the ununiformity of the current distribution resulting from twist turbulence becomes the possible cause of an AC-loss enhancement, Next based on the research result about the effects of the current distribution in the conductor to stability and AC losses, the design concept of a new-architecture superconducting conductor which made the stability and the low AC loss balance was proposed. The design of a trial production conductor based on this design concept was performed, and the AC loss and the stability were analyzed. Moreover, in order to examine the feasibility of conductor manufacturing, the conductor trial production was performed. Less

作为前期研究工作，我们研究了超导电缆中电流分布不均匀对稳定性的影响。可知，在将绞线电缆间的电流传输特性维持在电流传输部的放热不会使稳定性恶化的基准值以上的情况下，即使在绞线间产生不均匀的电流，对稳定性的影响也小。接受上述研究结果，进行了控制导体内的电流分布的高稳定性导体的开发研究。控制导体中的电流分布，并对具有高稳定性和减少交流损耗的重绕保险的绞合电缆结构的超导导体进行了开发研究。首先设计了导体中的电流分布和交流损耗的关系。根据使用电缆导管导体的大型超导线圈的交流损耗的测量结果，在工作频率附近的低频区域发现交流损耗增加，这被认为是阻碍大型超导线圈使用的新因素，并正在紧急调查可能的原因。在这项研究中，基于对绞合电缆导体中电流分布不均匀性随导体纵向变化的估计，使用2根绞合电缆进行了元件实验。结果表明，扭转湍流造成的电流分布不均匀性成为交流损耗增强的可能原因，接下来基于导体中电流分布对稳定性和交流损耗影响的研究结果，提出了一种实现稳定性和低交流损耗平衡的新型结构超导设计理念。基于该设计理念进行了试制导体的设计，并对交流损耗和稳定性进行了分析。此外，为了检验导体制造的可行性，进行了导体试制。较少的