传输电流法测量Bi2223/Ag多芯高温超导带材的交流损耗  

AC Losses of Bi2223/Ag Superconducting Tape Measured by Transport Current Method

作　　者：胡立发[1,2] 周廉[1] 王金星 张平祥[1] 李成山[1] 扬仕钟 何砚发 李景会 

机构地区：[1]西北有色金属研究院 [2]东北大学,辽宁沈阳110006 [3]东北大学

出　　处：《稀有金属材料与工程》2001年第3期169-172,共4页Rare Metal Materials and Engineering

基　　金：国家超导研究开发项目(863-CD010101)

摘　　要：利用传输电流法设计了一套高温超导体自场损耗测量系统，样品上负载的传输电流幅值可以达到１００Ａ，频串在 ０．５ Ｈｚ到１０００Ｈｚ之间任意可调。测量了 Ｂｉ２２２３／Ａｇ高温超导带材在７７Ｋ不同频率条件下的自场交流损耗，并将实验结果与Ｎｏｒｒｉｓ方程的预期值进行了比较。发现当传输电流的频率较低时，Ｂｉ２２２３／Ａｇ的交流损耗主要是磁滞损耗；而当频率较高时耦合损耗不能忽略。An experimental set-up was designed for measuring the self-field losses of Bi2223/Ag HTS tapes using a transport current method. The frequency of transport current can be freely changed from 0.5 Hz to 1000Hz. Its amplitude can be as much as 100A. The self-field losses of Bi2223/Ag tapes,which are made by the traditional PIT method with the critical current of 15.5A and SC/Ag ratio of about 0.25 were measured at 77K with differnt frequency transport currents. The results are compared with those predicted by the Norris equations based on the critical state model. When the frequency of AC current is low the AC losses of Bi2223/Ag multifilamentry tapes are domestically hysterestic; As soon as the frequencies are more than 200 Hz, the eddy current losses can not be neglected.

关 键 词：交流损耗 BI2223/AG 传输电流法 测量 超温超导带材 

分 类 号：TM26[一般工业技术—材料科学与工程]