不同截面几何形状超导带材的磁化损耗  

Magnetization loss of superconductor tapes with different cross section

作　　者：张泉[1,2] 王秋良[1] 陈鹏[1,2] 

机构地区：[1]中国科学院电工研究所中国科学院应用超导重点实验室,北京100080 [2]中国科学院研究生院,北京100039

出　　处：《低温与超导》2009年第10期1-3,7,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金项目(项目编号:10355001)资助

摘　　要：针对不同截面几何形状带材,基于高温超导体非线性特性,假设超导体处于横向交变磁场作用下,研究其截面上磁化电流密度的分布,以及磁场穿透超导体过程的特征。结果显示同样面积大小时,椭圆矩形较之圆形方形更易穿透,电流密度分布更加不均,交流损耗的值也随之增大。Considering the different geometry figure of HTS superconductor tape＇s cross section, and based on the nonlinear character about the electric conductivity of HTS, the current distribution on tape＇s cross section has been researched when the tape is in a time - varying transverse magnetic field. The characteristic of magnetic field penetration process has also been discussed. The results indicate that ellipse and rectangle are penetrated easily than round and square if they have equal area. Besides this their current density distribution have more inhomogeneity. Ac loss of magnetization also increase at the same.

关 键 词：磁化损耗 几何形状 非线性电导率 

分 类 号：TM26[一般工业技术—材料科学与工程] TQ172.623[电气工程—电工理论与新技术]