Transport and magnetization ac losses of ROEBEL assembled coated conductor cables: measurements and calculations
Transport and magnetization ac losses of ROEBEL assembled coated conductor cables: measurements and calculations
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DOI：
10.1088/0953-2048/23/1/014023
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发表时间：
2009
影响因子：
3.6
通讯作者：
S. Terzieva;M. Vojenčiak;E. Pardo;F. Grilli;A. Drechsler;A. Kling;A. Kudymow;F. Gömöry;W. Goldacker
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文献类型：
--
作者：
S. Terzieva;M. Vojenčiak;E. Pardo;F. Grilli;A. Drechsler;A. Kling;A. Kudymow;F. Gömöry;W. Goldacker
许多超导体应用需要具有高电流容量的电缆。这对于单件涂层导体是不可行的，因为它们的交流损耗太大。因此，有必要开发具有高电流容量和低交流损耗的超导电缆。ROEBEL电缆提供了一个很有前途的解决方案。我们组装了三个ROEBEL电缆从商业YBCO涂层导体。电缆具有相同的宽度，但不同的股数，这导致不同的纵横比和电流容量。我们实验研究了它们在输运电流和垂直磁场下的交流损耗。此外，我们进行了数值计算，这与实验，特别是对运输的情况下。我们发现，在电缆中，股线之间有良好的电流共享。我们还发现，堆叠的股减少磁化损失。对于给定的临界电流，较厚的电缆具有较低的磁化交流损耗。此外，对于股线之间的良好电流共享，不需要导电矩阵。
Many superconductor applications require cables with a high current capacity. This is not feasible with single-piece coated conductors because their ac losses are too large. Therefore, it is necessary to develop superconducting cables with a high current capacity and low ac losses. One promising solution is given by ROEBEL cables. We assembled three ROEBEL cables from commercial YBCO coated conductors. The cables have the same width but a different number of strands, which results in different aspect ratios and current capacities. We experimentally studied their ac losses under a transport current or a perpendicular magnetic field. In addition, we performed numerical calculations, which agree with the experiments, especially for the transport case. We found that in the cables there is good current sharing between the strands. We also found that stacking the strands reduces the magnetization losses. For a given critical current, thicker cables have lower magnetization ac losses. In addition, a conducting matrix is not required for a good current sharing between strands.