预载对高温超导磁悬浮系统中横向运动引起的悬浮力衰减行为的影响  

INFLUENCE OF PRE-LOADING ON THE LEVITATION FORCE DECAY DUE TO TRANSVERSE MOVEMENT IN A HIGH-T_c SUPERCONDUCTING MAGLEV SYSTEM

作　　者：马光同[1,2] 王楠[1,3] 许媛媛[1,3] 蒋国强[1,3] 王金钗[1,3] 林群煦[1] 蒋冬辉[1] 刘伟[1] 

机构地区：[1]西南交通大学超导技术研究所,成都610031 [2]西南交通大学牵引动力国家重点实验室,成都610031 [3]西南交通大学电气工程学院,成都610031

出　　处：《低温物理学报》2011年第6期445-449,共5页Low Temperature Physical Letters

基　　金：西南交通大学大学生科研训练计划(批准号:100320);西南交通大学博士研究生创新基金和国家自然科学基金(批准号:51007076)资助的课题~~

摘　　要：预载是一种有效抑制高温超导磁悬浮系统中由横向运动引起的悬浮力衰减的方法,但目前研究仅停留在概念验证阶段,尚未对影响预载效果的一些因素进行详细地分析和研究.利用高温超导磁悬浮测试系统,本文通过改变块材的冷却条件(场冷和零场冷)、悬浮高度以及轨道磁场结构、材料性能等实验研究了不同预载高度下YB-CO块材的悬浮力随横向运动次数的变化关系,得到这些因素对预载条件下悬浮力随横向运动变化情况影响的规律.结果表明,预载高度越低,由横向运动引起的悬浮力变化越快地趋于稳定,但悬浮力的稳定值也越小,并且这一现象不随冷却条件、悬浮高度、轨道磁场结构和材料性能等因素的改变而变化.The study has confirmed that the pre-loading is an effective method to suppress the levitation force decay due to the transverse movement in a high- Tc superconducting （HTS） maglev system. However, the study is only an idea, and has not yet evaluated the operating factors that influence the effectiveness of the pre-loading in detail. With a HTS maglev measurement apparatus, the dependence of the levitation force of an YBCZ） bulk on the reciproeating time of the transverse movement under diffterent pre-loading pendence was also appraised by changing the cooling condition （zero-field-cooling and field-cooling）, levitation height and the structure of the magnetic rail as well as material property. The results show that, the change of the levitation force due to the transverse movement can achieve a saturated state within smaller reciprocating time of the transverse movement with decreasing the pre-loading position. Yet the saturated value of levitation force decreases with the pre-loading position. Those findings are independent on the cooling condition, levitation height, structure of the magnetic rail and also material property.

关 键 词：Y-Ba-Cu-O块材 悬浮力 横向运动 预载 永磁轨道 

分 类 号：TM265[一般工业技术—材料科学与工程]