Coupling Losses Characteristics of Large Superconducting Conductors for Electric Power Applications Affected by Internal Transverse Electromagnetic-Forces

受内部横向电磁力影响的电力应用大型超导导体的耦合损耗特性

基本信息

批准号：
07455121
负责人：
KAWABATA Shuma
金额：
$ 4.03万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455121/
关键词：
superconducting coupling loss conductor magnet electromagnetic-force cable-in-conduit current ラザフォードケーブル

项目摘要

The inter-strand coupling losses of stranded conductors can become larger according to circumstances of their applications. It is a problem to be considered. As for those losses many investigations have been made recently. But for the most of them the losses under the changing transverse magnetic field are estimated. According to them, the losses much depend upon the surface conditions and the structures of the stranded-cables. Under the circumstances of their real applications, the conductors usually have transport current, and consequently the strands in the conductors are subjected to the electromagnetic-forces. The losses can be changed by the forces. But the characteristic of these changes in the losses is not yet made clear.The purpose of this study is to develop the system which can measure the inter-strand coupling losses itself in the stranded conductors above all cable-in-conduit (CIC) conductors with transport current under the transverse magnetic field, and that in a wide frequency range, and to elucidate the dependence of these losses on the electromagnetic-force to the strands. This new measuring system enables us to measure the coupling loss of large scale conductors with transport current of 20-30kA and the transverse magnetic field of 3.22T bias in the wide frequency range of the superposed ripple field of 0.1-300Hz. By this system the coupling losses are measured to the extent of 1.5T in the bias transverse magnetic field, and 20kA in the transport current. The data of the measurements show that the change of the coupling loss is only a little in the low frequency range to the extent of the electromagnetic-force of 0.9MPa in the case of IS-conductor of the poloidal field coil for Large Helical Device (LHD).

根据其应用的情况，滞留导体的链间耦合损失可能会变得更大。这是一个问题。至于这些损失，最近已经进行了许多调查。但是对于大多数人来说，估计横向磁场不断变化的损失。据他们说，损失很大程度上取决于滞留量的表面条件和结构。在其真实应用的情况下，导体通常具有运输电流，因此导体中的链受到电磁冲击。损失可以由部队改变。但是，这些变化在损失中的特征尚未明确。这项研究的目的是开发可以在所有电缆（CIC）导体高于所有电缆（CIC）导体的链间耦合损失的系统中。在横向磁场下的运输电流，并且在较大的频率范围内，并阐明了这些损失对电磁力对链的依赖性。这个新的测量系统使我们能够以20-30KA的运输电流为大规模导体的耦合损失，而在0.1-300Hz的超叠加波纹场的宽频率范围内，横向磁场为3.22T偏置。通过该系统，耦合损耗的测量为偏置横向磁场中的1.5t的程度，在传输电流中测量20KA。测量数据表明，在大型螺旋设备的Poloidal场盘线圈的IS-导体的情况下，耦合损耗的变化仅在低频范围内有点少一点（电磁强度为0.9MPa（ LHD）。