高温超导大电流导体临界电流特性研究

The application of relaxation iteration method in the design of current lead

YBCO带材在高磁场下仍有好的通流性能,可以用多根高温超导带材构成大电流导体用于高场磁体。为减小导体的交流损耗,大电流导体有多种结构形式,缠绕型和扭转堆叠是其中的两种结构形式。临界电流是高温超导大电流导体的重要指标之一。文中采用四引线法对这两种导体结构在液氮、自场环境下的临界电流特性进行了实验测量,分析并总结了其临界电流特性与结构的关系。

YBCO coated tapes have high current capabilities at high magnetic fields. It is desired to develop a multi - tape high current conductor for high -field magnets. Considering reducing AC loss of the conductor, many conductor structure of conductor have been developed. CORC （ Conductor on Round Core） and TSTC （Twisted Stacked Tape Cable） are two of them. One of important index of high - current conductor is critical current. The critical current of them was measured in liquid nitrogen and self- field with the four probe method, analysis and summaries were discussed on the relationship between conductor structure and the characteristics of critical current of the conductor.