Numerical Evaluation of AC Loss Property in Bi-2223 Tapes Affected by Multifilament Structure
Numerical Evaluation of AC Loss Property in Bi-2223 Tapes Affected by Multifilament Structure
复制标题
受多丝结构影响的 Bi-2223 带材交流损耗特性的数值评估
DOI：
10.1109/tasc.2007.898390
复制
发表时间：
2007
影响因子：
1.8
通讯作者：
K. Funaki
中科院分区：
文献类型：
--
作者：
K. Kajikawa;D. Nakamura;T. Hayashi;K. Funaki
本文给出了将实际的Bi2223Ag护套导线理想化后，各种类型的无绞合多芯带材交流损耗的数值结果。在外加垂直于带线最宽面上的横向磁场的情况下，用能量最小化的方法模拟了在Bean临界态模型下磁通穿透超导细丝的过程。根据初始状态下矢量势的分布，计算了循环场下的交流损耗。研究了丝的排列和形状对损耗的影响，并与将整个丝区域视为均匀超导体的丝的损耗进行了比较。
This paper describes the numerical results of AC losses in various types of non-twisted multifilamentary tapes that actual Bi-2223 Ag-sheathed wires are idealized. The penetration process of magnetic flux into the superconductor filaments subject to Bean's critical state model is simulated for the application of an external transverse magnetic field perpendicular to the broadest face of tape wire by means of energy minimization. The AC losses under cyclic fields are calculated from the distribution of a vector potential in an initial state. The influences of arrangements and shapes of the filaments on the losses are investigated as compared with those for a wire that the entire filamentary region is regarded as a homogeneous superconductor.