Current Distribution in YBCO Coated Conductors of Toroidal Coil Composed of Multiple Double Pancake Coils
Current Distribution in YBCO Coated Conductors of Toroidal Coil Composed of Multiple Double Pancake Coils
复制标题
多个双扁平线圈构成的环形线圈中YBCO涂层导体中的电流分布
DOI：
10.1007/s10948-010-0872-z
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发表时间：
2011
影响因子：
1.8
通讯作者：
T. Hamajima
中科院分区：
文献类型：
--
作者：
M. Tsuda;T. Hamajima
应防止在由多个YBCO双饼线圈组成的环形线圈中，由于磁带大小、线圈大小和导体变形的制造误差而导致电流分布不均匀。这是因为电流分布不均匀导致YBCO带材的交流损耗增大，临界电流减小。因此，我们解析地研究了由两个YBCO带并联的换位导线组成的八个串联的双饼线圈和由单个YBOC带和导线串联的八组两个并联的双饼线圈组成的环形线圈的制造误差与电流分布的关系。在防止电流分布不均匀方面，由单带和导线并联组成的多个双薄片线圈比由多个带并联的换位导线组成的双薄片线圈更有效。通过增加每个电流路径中串联的双饼线圈的数量，增加并联电流路径的长度，可以改善电流分布的不均匀性。
We should prevent non-uniform current distribution due to manufacturing errors of tape size, coil size, and conductor deformation in the toroidal coil composed of multiple YBCO double pancake coils. This is because the non-uniform current distribution causes the increase of AC losses and the decrease of critical current in the YBCO tapes. Therefore, we analytically investigated the relationship between the manufacturing error and the current distribution in the toroidal coils composed of the eight series-connected double pancake coils composed of the transposed conductor with two parallel-connected YBCO tapes and the eight sets of two parallel-connected double pancake coils composed of single YBOC tape conductor connected in series. The parallel-connected multiple double pancake coils composed of single tape conductor is much more effective for preventing the non-uniform current distribution than the double pancake coil composed of the transposed conductor with parallel-connected multiple tapes. The non-uniformity of current distribution can be improved by increasing the length of parallel-connected current path by increasing the number of series-connected double pancake coils in each current path.