传输交流的Bi2223/Ag高温超导带在不同取向交流外场下的交流损耗(英文)  

AC LOSSES OF Bi2223/Ag TAPES CARRYINGAC TRANSPORT CURRENT IN DIFFERENT ORIENTATIONS OF THE EXTERNAL AC MAGNETIC FIELD

作　　者：张国民[1] 林良真[1] 肖立业[1] 丘明[1] 舒立[1] 余运佳[1] 

机构地区：[1]中国科学院电工研究所应用超导研究室

出　　处：《低温物理学报》2002年第1期23-29,共7页Low Temperature Physical Letters

基　　金：ThisworkwassupportedbytheNationalCenterforR&DonSuperconductivityofChina ,theStateMinistryofScienceandTech nologyofChina ,andChineseAcademyofSciences .

摘　　要：在高温超导的电力应用中 ,如超导电机、变压器等 ,多数情况下 ,高温超导带材在通以交流传输电流的同时还处于交变磁场中 .此时 ,超导体的交流损耗不仅依赖于磁场的大小 ,还与磁场相对于超导带面的取向有关 .本文在 77K及工频 5 0Hz情况下 ,实验研究了单根多芯Bi2 2 2 3/Ag高温超导带及两带并联时的交流损耗随着外磁场与带面夹角的变化情况 ;以及交流磁场对临界电流的影响情况 ;High temperature superconducting (HTS) tapes are promising in power application such as the motors and transformers etc. In most cases, the HTS tapes are exposed to an AC magnetic field and fed with an AC transport current. The AC losses depend not only on the magnitude of the external magnetic field, but also on its orientation with respect to the tape surface. In this work, AC losses of the multifilamentary Bi2223/Ag tape, both for one tape and two tapes stack, are experimentally investigated as a function of field orientation with respect to the wide side of the tape at 77K and 50Hz power frequency. The influence of AC magnetic field on critical current are studied. And the experimental results for one tape and two tapes stack are given and compared.

关 键 词：高温超导带材 交流传输电流 交流损耗 交流磁场 BI2223/AG 铋2223 银 临界电流 电力应用 

分 类 号：O511[理学—低温物理]