Analysis and measurement of AC transport current loss in BSCCO tape in external magnetic field
Analysis and measurement of AC transport current loss in BSCCO tape in external magnetic field
复制标题
外磁场中BSCCO带交流传输电流损耗的分析与测量
DOI：
10.1109/77.920298
复制
发表时间：
2001
影响因子：
1.8
通讯作者：
T. TYakao
中科院分区：
文献类型：
--
作者：
S. Fukui;M. Ikeda;T. Sano;H. Yamaguchi;T. TYakao
建立了一种计算高温超导带在外加磁场作用下的电流分布和交流损耗的数值模型。该模型考虑了电场和电流密度的关系以及导线的形状。测量了传统Bi2223/Ag多丝带在直流外磁场下的交流输运电流损耗，并与数值计算的交流输运电流损耗进行了比较。测量到的交流输运电流损耗随着直流外场的增大而增大。实验还表明，随频率的增加，每周期的测量损耗减小。这些特征不能用临界状态模型来解释。模型计算的数值损失与实测数据吻合较好。通过数值计算得到导线中的电流分布，解释了直流磁场下的输运损耗特性及其与频率的关系。
A numerical model to calculate current distribution and AC loss in a high temperature superconducting tape carrying AC transport current exposed to an external magnetic field was developed. The model considers the electric field and current density relation and the shape of wire. The authors measured the AC transport current losses in a conventional Bi2223/Ag multifilamentary tape in a DC external magnetic field and the results were compared with the numerically calculated AC losses. The measured AC transport current losses increase as the DC external field increases. It is also shown that the measured losses per cycle decrease with increasing frequency. These characteristics cannot be explained by the critical state model. The numerical losses by their model reasonably agree with the measured data. The transport loss characteristics under the DC field and their dependence on the frequency are explained by the numerically calculated current distribution in the wire.