第二代高温超导带材的大电流V-I测量与热效应消除  

Large-current V-I measurement of second generation HTS tapes with eliminating the effects of Joule heat

作　　者：单雪娇[1] 白心悟[1] 朱娇[1] 桑丽娜[1] 蔡传兵[1] 朱红妹[1] 张义邴[1] 

机构地区：[1]上海大学理学院物理系,上海200444

出　　处：《低温与超导》2012年第4期27-31,共5页Cryogenics and Superconductivity

基　　金：上海市重大科技项目(11DZ1100305);上海市重点学科开放课题(S30105)资助

摘　　要：介绍了0～400 A零外场下高温超导带材大电流V-I测试系统。实验利用计算机自动实现电流/电压扫描、采集并处理数据,测量温度为液氮温区。利用导热分析,优化仪器设计,最大程度地消除V-I测量的爬坡效应和大电流的热效应,提高试样的耐大电流冲击能力、测量精度和稳定性。A large-current V-I measurement system with a current range of 0 ~ 400 A and under zero applied field for second generation high temperature superconducting（HTS） tapes was reported in this paper.HTS tape samples and current carrying electropoles were immersed in liquid nitrogen.Current-voltage scanning,experimental data collecting and data processing were performed automatically by computer based on digital communication interface.By analyzing the electric and heat transportation of HTS tapes,the current electropoles and connections to HTS tape samples were optimized.The influence of the linearly climbing of V-I curve and Joule heat effect was weakened.The ability of high current scanning,accuracy and stability of the measurement system were enhanced.

关 键 词：高温超导带材 大电流 V-I测量 低温 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]