NdFeB永磁体下YBaCuO块材在交流磁扰动中的悬浮力磁滞特性  

Hysteresis characteristic of levitation force in alternating magnetic field

作　　者：赵志英[1] 杨烨[1] 秦公平[1] 白雪[1] 秦黎[1] 赵立峰[1] 羊新胜[1] C.H.Cheng 蒲明华[1] 赵勇[1] 

机构地区：[1]磁浮技术与磁浮列车教育部重点实验室,西南交通大学超导研究开发中心,成都610031

出　　处：《低温与超导》2010年第1期29-31,36,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金(50372052,50588201);国家高科技项目(863)(2007AA03Z203);高等学校博士点专项科研基金(SRFDP200806130023);长江学者和创新团队发展计划项目(IRT0751);西南交通大学科技发展基金;西南交通大学博士创新基金资助

摘　　要：研究了交流磁扰动对高温超导块材和永磁体之间悬浮力的影响。实验分析了在零场冷(ZFC)条件下,不同频率的交流磁场扰动下的悬浮力曲线;另外还研究了交流磁扰动在永磁体下降和上升过程中对悬浮力的影响,发现上升过程中悬浮力受交流磁场影响较大,而在下降过程中影响则较为不明显,同时随着交流磁场幅值的增大,悬浮力的滞回曲线逐渐加宽。说明交流磁场导致了超导块磁滞损耗的增加,对超导磁浮特性的研究具有理论意义。Behavior of magnetic levitation force between a HTS bulk and a permanent magnet in changing alternating magnetic disturbance is investigated systemically.The levitation force was measured under the different frequency of alternating magnetic field in zero field cooling（ZFC） model.The results show the influence is not obvious in the falling process while significant obvious in the rising process.The levitation force hysteresis curves were gradually widened when the alternating magnetic amplitude increases.This is due to external alternating magnetic field caused by hysteresis strengthening of superconductor bulk.It was also observed that the levitation force is influenced by the applied magnetic field most seriously under frequency of 300Hz.

关 键 词：YBCO超导体 超导磁悬浮 悬浮力 磁滞曲线 

分 类 号：TM273[一般工业技术—材料科学与工程] TM26[电气工程—电工理论与新技术]