强钉扎高温超导体与永磁体系统的悬浮力数值模型

本文从数值模拟和实验两方面研究了熔融织构Y-Ba-Cu-O(YBCO)高温超导块材与永磁体组成的磁悬浮系统的悬浮特性.通过理论与实验结果的比较,在Hikihara-Moon超导磁悬浮动力学唯像模型的基础上,提出了强钉扎磁悬浮力模型,并进一步研究了熔融织构YBCO块材在不同条件下的悬浮特性,包括:场冷高度(FCH)和零场冷却(ZFC)的对磁浮力的影响,以及由不同运动速度导致的磁悬浮力的变化等.结果表明,强钉扎磁悬浮力模型适合于精确描述由熔融织构YBCO高温超导块材与永磁体所组成的磁悬浮系统的悬浮特性.

NUMERICAL MODEL OF LEVITATION FORCE BETWEEN A YBCO BULK WITH STRONG PINNING FORCE AND A PERMANENT MAGNET

The characteristics of levitation force of the system consisted of a melt-texture YBCO high-temperature superconductor (HTS) bulk and a permanent magnet (PM) is researched by the two sides of numerical simulation and experiment in this paper. After we compared the results of simulation and experiment again and again, on the basic of the model of levitation dynamics between a HTS bulk and a PM given by Hikihara and Moon, we put forward the numerical model of levitation force between a YBCO bulk with strong pinning effect and a PM (the model with strong pinning effect). and we investigate the levitation characteristics of the system which be consisted of a melt-textured YBCO bulk and a PM under different conditions, including the effect of field cooling height (FCH), the effect of zero-field-cooling (ZFC) and the effect due to the velocity of reverse motion between HTS and PM. The numerical simulation results using the model with strong pinning effect prove the model with strong pinning effect is fit to accurately describe the characteristics of the levitation force of the system consisted of a melt-texture YBCO HTS bulk and a PM.