A Method to Increase the Lateral Reversible Region of Bulk YBCO Above a Permanent Magnet Guideway

作者：Liu W^*; Wang J S; Lin Q X; Ma G T; Zheng J; Wang S Y

来源：Journal of Low Temperature Physics, 2010, 158(5-6): 922-933.

DOI：10.1007/s10909-009-0054-1

• Guidance force
• High-T(c) superconductor
• Lateral reversible region
• Pre-displacement

Lateral reversible region of the bulk high-T (c) superconductor (HTSC) above the permanent magnet guideway (PMG) is a key parameter for the high-T (c) superconducting (HTS) maglev system. The lateral stability and guidance force are proportional to the width of the lateral reversible region. When the lateral displacement of the bulk HTSC exceeds the reversible region, the maglev system will return to a new lateral equilibrium position. The method with the use of pre-displacement can successfully increases the lateral reversible region of the bulk HTSC. By the correct choice of the maximum lateral offset and a new starting point, the instability of flux motion can be suppressed. Unsuitable usage of this method will cause the intersection of guidance force and reduce the reversible region. Analyses based on the magnetizing history and pinning metamorphoses well explain the experimental results. Difference between this method and the pre-load method is also discussed in this article.

• 出版日期2010-3
• 单位西南交通大学