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.

如果开发了将高温超导体（HTS）中的AC损失降低到传统HTS技术的十分之一的技术，那么HTS的各种应用都比仅仅是DC应用了。我们的研究对象是通过对HTS的电子现象的深入了解，系统地开发基本技术，以减少HTS应用中的AC损失。 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 electronic and mechanical environment of HTS appliances;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项目1）我们开发了一种以电子方式测量总交流损耗的方法。通过使用calolimetric方法的同时测量来证明这种电力方法的有效性。2）我们开发了一种准互惠的方法，以减少由于外部AC磁场而导致的涂层导体中的磁化损失，这是多个数量级的一个数量级。3）我们表明，在相邻的磁场中，磁场在磁场中大大减少了磁场的损失。使用电线的损失数据开发了。 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.

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）

Numerical evaluation of AC loss in high temperature superconducting coil

DOI：
10.1109/tasc.2004.830027
发表时间：
2004-08
期刊：
IEEE Transactions on Applied Superconductivity
影响因子：
1.8
作者：
H. Tonsho;M. Toyoda;S. Fukui;M. Yamaguchi;T. Sato;M. Furuse;H. Tanaka;K. Arai;M. Umeda
通讯作者：
H. Tonsho;M. Toyoda;S. Fukui;M. Yamaguchi;T. Sato;M. Furuse;H. Tanaka;K. Arai;M. Umeda

FEM analysis of AC loss in twisted Bi-2223 multifilamentary tapes carrying AC transport current in AC transverse magnetic field with arbitrary orientation