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

• 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

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).

绞合导体的绞合损耗会根据其应用环境的不同而增大。这是一个需要考虑的问题。关于这些损失，最近进行了许多调查。但对其中大多数在横向磁场变化下的损耗进行了估计。根据他们的研究，损耗在很大程度上取决于电缆的表面条件和结构。在实际应用的情况下，导体通常具有输运电流，因此导体中的导线受到电磁力的作用。力可以改变损失。但这些损失变化的特点尚不清楚。本研究的目的在于建立一套能测量在横向磁场作用下宽频率范围内带输运电流的绞合导体（即管中电缆导体）的绞合损耗的系统，并阐明这些损耗与绞合导线所受电磁力的关系。该测量系统能够在0.1-300Hz的叠加纹波场宽频率范围内测量输运电流为20-30kA、横向磁场为3.22T偏置的大型导体的耦合损耗。该系统在偏置横向磁场中测量了1.5T的耦合损耗，在输运电流中测量了20kA的耦合损耗。测量数据表明，大型螺旋装置（LHD）用极性场线圈采用is导体时，耦合损耗在低频范围内变化很小，电磁力为0.9MPa。

项目成果

F.Sumiyoshi et al.: "The change of coupling losses in aluminum-stabilized superconductors due to the Hall effect" IEEE Tran.Appl.Supercond.5・2. 721-724 (1995)

F.Sumiyoshi 等人：“由于霍尔效应导致铝稳定超导体中耦合损耗的变化”IEEE Tran.Appl.Supercond.5・2 (1995)。

F.Sumiyoshi et al.: "Measurements of Coupling Losses in Superconducting Cable-in-Conduit Conductors Affected by Internal Transverse Electromagnetic-Forces" IEEE Trans.Magn.32・4. 2838-2841 (1996)

F.Sumiyoshi 等人：“受内部横向电磁力影响的超导电缆导管导体中的耦合损耗的测量”IEEE Trans.Magn.32・4 (1996)。

住吉文夫 他: "1kWh/1MW-SMES用ラザフォードケーブルの結合損失" 低温工学. 31(印刷中). (1996)

Fumio Sumiyoshi 等人：“1kWh/1MW-SMES 的卢瑟福电缆的耦合损耗”Cryogenic Engineering（低温工程）（1996 年）。

F.Sumiyoshi et al.: "The change of coupling losses in aluminium-stabilized superconductors due to the Hall effect" IEEE Tran.Appl.Super.5. 721-724 (1995)

F.Sumiyoshi 等人：“由于霍尔效应导致铝稳定超导体中耦合损耗的变化”IEEE Tran.Appl.Super.5。

F.Sumiyoshi et al.: "Coupling Losses in Rutherford Cable Designed for 1kWh / 1MW - SMES" Cryogenic Engineering. Vol.31, No.3. 116-122 (1996)

F.Sumiyoshi 等人：“为 1kWh / 1MW - SMES 设计的卢瑟福电缆中的耦合损耗”低温工程。