非均匀电流分布对堆叠带材动态特性的影响  

Effects of non-uniform current distribution on the dynamic characteristics of stacked superconducting tapes

作　　者：王昊 乔冠群 高曙阳 赵可 羊新胜 Wang Hao;Qiao Guanqun;Gao Shuyang;Zhao Ke;Yang Xinsheng(School of Physical Science and Technology,Southwest Jiaotong University,Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Ministry of Education,Chengdu 610031,China)

机构地区：[1]西南交通大学物理科学与技术学院磁浮技术与磁浮列车教育部重点实验室,成都610031

出　　处：《低温与超导》2025年第3期17-27,共11页Cryogenics and Superconductivity

基　　金：四川省科技计划项目(2023YFH0009);科技部国家磁约束核聚变能发展研究专项(2022YFE03150102)资助。

摘　　要：本文以一定总传输电流下不同的负载比i=I_(t)/I_(c0)、外磁场幅值及带材间堆叠间隙的两根传输不同大小直流电流的并联堆叠带材为研究对象。通过实验和有限元仿真相结合的方法研究其动态特性(动态电阻与损耗)。结果表明,对于不同的负载比与外磁场幅值,电流非均匀分布程度越大,动态电阻变化与动态损耗越大。且在较高负载比与外磁场幅值下,动态电阻的变化和总损耗,明显高于其在较低负载比与低外磁场幅下的数值;堆叠带材的屏蔽效应减小动态电阻变化与总损耗;电流非均匀分布使总损耗中的动态损耗增大。The study focused on two parallel stacked tapes transmitting different levels of DC current,with variations in load ratio i=It/Ic0,external magnetic field amplitude,and stacking gap between the tapes,under a constant total DC current.The dynamic characteristics(dynamic resistance and losses)were investigated through a combination of experiments and finite element simulations.The results indicate that,for different load ratios and external magnetic field amplitudes,a greater degree of non-uniform current distribution leads to larger changes in dynamic resistance and higher dynamic losses.Notably,at higher load rati⁃os and external magnetic field amplitudes,the changes in dynamic resistance and total losses are significantly greater than that at lower values.The shielding effect of the stacked tapes reduces the changes in dynamic resistance and total losses.The non-uni⁃form current distribution increases the dynamic loss component of the total loss.

关 键 词：动态电阻 总损耗 堆叠 高温超导 

分 类 号：TM26[一般工业技术—材料科学与工程]