圆截面复合超导体中的电流转移和分布  

CURRENT DISTRIBUTION AND TRANSFER IN A CYLINDRICAL SUPERCONDUCTING COMPOSITE CONDUCTORS

作　　者：王银顺[1,2] 李肖[1] 张肖杰[1] 程远[1] 代常会[1] 郑志强[1] 刘天玉[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《低温物理学报》2012年第6期425-429,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(批准号:51077051)资助的课题~~

摘　　要：圆截面复合超导体中的电流分布以及超导体和金属层间存在的电流转移对实用超导体的稳定性有很大影响.本文采用一种二维模型对电流在圆截面复合超导体的分布及电流转移作了分析,得到了电流转移长度和接触电阻的关系,同时分析了在直流时圆截面复合超导体的损耗.结果表明,接触电阻越大,电流转移长度越长,这对于超导体在实际中运行的热稳定性和可靠性有重要的参考价值.Current distribution and the current transfer between the metal stabilizer and superconductor in cylindrical superconducting composite conductor, made of superconductor and metals, have a great influence on the stability of superconductors. In this paper, the current distribution and transfer are analyzed by two dimensional model. The relationship between current transfer length and contact resistance is analytically obtained, the loss of the composite conductors is also deduced if it transports direct current （DC）. It is shown that the bigger the contact resistance is, the longer the current transfer length is. These results have important reference for analysis on thermal stability of practical composite superconductors.

关 键 词：圆截面复合超导体 电流转移长度 接触电阻 能量损耗 

分 类 号：TM26[一般工业技术—材料科学与工程]