外场下机械振动对高温超导带材交流损耗的影响  

EFFECTS OF VIBRATION ON AC LOSSES OF HTS TAPES IN DC APPLIED FIELD

作　　者：许振领[1,2] 张国民[1,2,3] 朱志芹[2,3] 李晓航[2,3] 杜晓纪[2,3,4] 张正臣[2,3,4] 

机构地区：[1]信息工程大学理学院,郑州450001 [2]中国科学院应用超导重点实验室,北京100190 [3]中国科学院电工研究所,北京100190 [4]中国科学院研究生院,北京100039

出　　处：《低温物理学报》2010年第1期61-64,共4页Low Temperature Physical Letters

基　　金：全国优秀博士学位论文作者专项资金(批准号:200750);国家自然科学基金(批准号:50977092)资助的课题

摘　　要：高温超导带材在磁场中传输交变电流时,将受到电磁力的作用而产生机械振动,振动对带材的交流损耗将产生影响.本文讨论了振动情况下交流损耗的测量方法,在平行于带面的直流磁场下,测量了Bi-2223/Ag高温超导带材在不同振动情况下的交流损耗.结果显示:当传输电流频率偏离样品的共振频率时,振动对带材的交流损耗影响不大;只有当电流频率在共振频率附近时,样品产生剧烈振动,交流损耗才有明显的增加;另外,带材振动时的交流损耗随频率变化曲线的斜率比不振动时略有增加.The high temperature superconducting tape will vibrate due to magnetic force when it carrying AC current in applied magnetic field. As a result, the vibration may affect AC losses of the tapes. In this work, the effect of vibration on AC losses was discussed. AC losses of Bi-2223 /Ag reinforced tapes were measured in different vibration situation in parallel DC magnetic field. According to the results, there were slight effects of the vibration on the AC losses of HTS tapes when the frequency of transport current deviated from resonance frequency. When the frequency of transport current close to resonance frequency, the tapes vibrate severely, thus AC losses increase obviously. Besides, the slopes of the frequency dependence curves of ac losses increase a little as the tape vibrating.

关 键 词：高温超导带材 交流传输损耗 机械振动 

分 类 号：TM26[一般工业技术—材料科学与工程] TH113.1[电气工程—电工理论与新技术]