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Systemization of elementary technology for high temperature superconductor AC applications based on electro-magnetics of fine structures of conductors

基于导体精细结构电磁学的高温超导交流应用基础技术系统化

基本信息

批准号：
14102019
负责人：
TSUKAMOTO Osami
金额：
$ 69.64万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2006
项目状态：
已结题

项目摘要

If technologies are developed to reduce AC losses in high temperature superconductor (HTS) to less than one tenth of those of the conventional HTS technology, more various applications of HTS become feasible than just DC applications. Our research object is to systematically develop elementary technologies to reduce the AC losses in HTS applications by deep understanding of electromagnetic phenomena of HTS. To pursue the research object we set the following research targets;a)To developed measurement methods of AC losses in HTS wires, assembled conductors and windings;b)To research and develop methods to greatly reduce the AC losses in HTS wires in electromagnetic and mechanical environment of HTS apparatuses;c)To research and develop design methods of structures of robust and low AC loss windings;We obtained the following important achievements in the term of this project.1)We develop a method to electrically measure the total AC losses. The validity of this electric method was proven by the simultaneous measurements with a calorimetric method.2)We developed a quasi-twisting method to reduce magnetization losses in coated conductors due to external AC magnetic fields by more than one order of magnitude.3)We showed that the losses were greatly reduced by the magnetic field produced by the neighboring conductors in the assembled conductors.4)Analytic method to calculate the AC losses in the coil using the loss data of wires was developed. Based on this analytic method, optimal configuration of a coil was shown to minimize the AC losses.5)We calculated necessary amount of copper to protect a coil wound of coated conductors from damages caused by a quench and showed a configuration of robust coils.With those achievements, we almost fulfill the R＆D objects to develop elementary technologies to realize low AC loss HTS apparatuses.

如果开发出将高温超导体（HTS）中的交流损耗降低到传统HTS技术的十分之一以下的技术，那么HTS的更多各种应用将变得可行，而不仅仅是直流应用。我们的研究目标是通过对高温超导电磁现象的深入理解，系统地开发降低高温超导应用中交流损耗的基础技术。为实现这一研究目标，我们确定了以下研究目标：a）发展高温超导导线、组合导体和绕组交流损耗的测量方法;B）研究和发展在高温超导装置的电磁和机械环境中大幅度降低高温超导导线交流损耗的方法;c）研究和发展坚固、低交流损耗绕组结构的设计方法;本课题主要取得了以下成果：1）提出了一种交流损耗的电测方法。通过与量热法同时测量，证明了这种电学方法的有效性。2）我们开发了一种准扭转方法，可以将外部交流磁场引起的涂层导体的磁化损耗降低一个数量级以上。3）我们表明，组装导体中相邻导体产生的磁场大大降低了损耗。4）提出了利用导线损耗数据计算线圈交流损耗的解析方法。根据该分析方法，给出了使交流损耗最小化的线圈的最佳配置。5）计算了保护涂层导体线圈免受失超损害所需的铜量，并给出了坚固的线圈配置。通过这些成果，我们基本实现了开发低交流损耗HTS装置的基础技术的研发目标。

项目成果

期刊论文数量（239）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Electromagnetic field analysis of rectangular superconductor with large aspect ratio in arbitrary orientated magnetic fields

DOI：
10.1109/tasc.2005.849176
发表时间：
2005-06
期刊：
IEEE Transactions on Applied Superconductivity
影响因子：
1.8
作者：
N. Enomoto;T. Izumi;N. Amemiya
通讯作者：
N. Enomoto;T. Izumi;N. Amemiya

AC loss reduction of YBCO coated conductors by multifilamentary structure

DOI：
10.1088/0953-2048/17/12/018
发表时间：
2004-12
期刊：
Superconductor Science and Technology
影响因子：
3.6
作者：
N. Amemiya;Satoshi Kasai;K. Yoda;Zhenan Jiang;G. Levin;P. Barnes;C. Oberly
通讯作者：
N. Amemiya;Satoshi Kasai;K. Yoda;Zhenan Jiang;G. Levin;P. Barnes;C. Oberly

Analysis of ac loss and current distribution in multi-layer tri-axial three-phase HTS cable

多层三轴三相高温超导电缆交流损耗和电流分布分析