摘要
本文研究７７Ｋ温区和不同背场下８１芯Ｂｉ２２２３／Ａｇ带材的传输交流损耗。临界电流的测量采用标准的四引线法；交流损耗的测量是在工频下样品通以正弦交流电流，利用电测法测量的。实验结果与Ｂｅａｎ临界态模型所预言的结果一致，损耗随背场的增大（临界电流的减小）而增大，并且与频率成正比；所以带材中损耗以磁滞损耗为主，涡流损耗（耦合损耗）可以忽略。
The measurement of transport alternating current losses in multifilamentary Bi2223/Ag tapes at 77K and power frequency under different DC background field is carried out. Critical current is measured using four terminal method and AC transport losses are measured by means of electrical method using sinusoidally varying current, and is found to be agreed with the results predicted by Bean's critical current model; the experimental results also show that the losses increase with decreasing critical current and are proportional to frequency, which confirms that the hysteretic loss is the dominant source of power dissipation, and eddy current (coupling) losses in silver matrix and interfilament are neglectible.
出处
《电工电能新技术》
CSCD
1999年第1期16-18,24,共4页
Advanced Technology of Electrical Engineering and Energy
基金
国家超导中心支持项目
关键词
高温
超导电性
多芯带材
交流损耗
超导体
High Tc Superconductivity, Multifilamentary tapes, AC Losses
