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.
参考文献
| [1] | 宋宏海,王家素,王素玉,王兴志,郑珺,岑冀娜,方华荣.高温超导磁悬浮系统中横向运动对悬浮力和导向力影响的研究[J].低温物理学报,2005(z1):963-967. |
| [2] | Jing H;Wang J;Wang S;Wang L;Liu L;Zheng J;Deng Z;Ma G;Zhang Y;Li J .A two-pole Halbach permanent magnet guideway for high temperature superconducting Maglev vehicle[J].Physica, C. Superconductivity and its applications,2007(0):426-430. |
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