AC loss and current distribution characteristics of co-axial multi-layer cable conductor
AC loss and current distribution characteristics of co-axial multi-layer cable conductor
复制标题
同轴多层电缆导体的交流损耗及电流分布特性
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
T. Takao
中科院分区：
文献类型：
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作者：
S. Fukui;T. Hirasawa;M. Yamaguchi;T. Satoh;T. Takao
建立了超导磁屏蔽同轴多层电缆导体中交流损耗和层间电流分布的解析模型。在该模型中，考虑了屏蔽电流在磁屏蔽导体中产生的磁场效应。数值计算了层间电流分布和交流损耗，并评估了它们与电缆扭距和方向的关系。分析结果表明，损耗和电流分布与电缆扭距和方向有很大的关系。还发现屏蔽电流产生的磁场对电缆导体部分的电流分布和交流损耗有很大影响。磁屏蔽导体中的电流分布和损耗比输运电流导体大。并给出了优化后的索结构实例。
An analytical model to estimate the AC losses and the inter-layer current distribution in co-axial multi-layer cable conductors with superconducting magnetic shields was developed. In our model, the effect of magnetic field induced by the shielding current flowing in the magnetic shield conductors was taken into consideration. The inter-layer current distribution and the AC losses were numerically calculated and their dependence on the twist pitches and directions of the cables was evaluated. The analytical results showed the strong dependence of the losses and the current distribution on the twist pitches and directions of the cables. It was also found that the magnetic field produced by the shielding currents strongly affected the current distribution and the AC losses in the conductor part of the cable. The current distribution and the AC losses dissipated in the magnetic shield conductors could be larger than those of the transport current conductors. Examples of optimized cable structure are also shown.