| 摘要: |
| 研究了两种磁悬浮系统组态中圆台形辅助永磁体厚度对高温超导体捕获磁场和超导磁悬浮力的影响。结果表明,圆台形辅助永磁体的下表面和GdBCO超导体上表面同处在一个水平面上,磁化用圆台形辅助永磁体的厚度H从5mm增加到45mm时,超导体捕获磁场和磁悬浮力与圆台形辅助永磁体的厚度直接相关。(1)当圆台形辅助永磁体的北极垂直向上且用液氮冷却后移除辅助永磁体时,最大磁悬浮力从21.8N增大到26.5N,再减小到22.9N；(2)当圆台形辅助永磁体的北极垂直向下且用液氮冷却后移除辅助永磁体时,最大磁悬浮力从20.5N减小到11.9N ,再增加到20.4N；(3)两种磁悬浮系统组态中最大磁悬浮力不一致,与零场冷情况下的最大磁悬浮力14.6 N也不同。在超导磁悬浮应用系统设计中,只有科学选择辅助永磁体形状和尺寸,合理设计组合方式,才能获得较强的磁场强度,提高超导磁悬浮力特性,该结果对促进高温超导体的实际应用具有重要的指导作用。 |
| 关键词: 圆台形辅助永磁体,高温超导体,超导磁悬浮力,捕获磁场 |
| DOI： |
| 投稿时间：2018-05-20修订日期：2018-11-07 |
| 基金项目:青海省自然科学基金 (批准号: 2016-ZJ-915)、国家自然科学基金 (批准号: 51167016、51342001)、青海省135高层次人才资助的课题 |
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| The effect of cone additional permanent magnet thickness on magnetic field distribution and the levitation force of single domain GdBCO bulk superconductor* |
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Ma jun1, He Xiaoming1, Zhou yonjie1, Chen bohang2, Chen zhanglon2
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| (1.College of physics and electronic information engineering, Qing hai Normal University;2.College of physics and electronic information engineering, Qing hai Normal University,) |
| Abstract: |
| It has been investigated that the influence of two configurations in different thickness of conical auxiliary permanent magnets of single domain GdBCO bulk capture field and superconducting magnetic levitation force results. Found that the auxiliary permanent magnet under the surface and bulk GdBCO on the surface to maintain at the same level, with the thickness of H permanent magnet assisted magnetization increased from 5mm to 45mm, the thickness of superconducting magnetic suspension force and the auxiliary permanent magnets are closely related (such as Z=2mm): (1) when the round table auxiliary permanent magnet pole N vertical and field cooling after removing the auxiliary permanent magnet, the largest superconducting magnetic force first increases from 21.8N to 26.5N, and then reduced to 22.9N; when the auxiliary permanent magnet N is vertical and downward and remove the auxiliary field after cooling The permanent magnet, the largest superconducting magnetic force first decreases from 20.5N to 11.9N, and then increased to 20.4N; (2) the two largest superconducting magnetic levitation force configuration is not equal, and the largest in the zero field cooling superconducting magnetic levitation force under 14.6 different. These results indicate that in the superconducting magnetic system design should be used only, the scientific selection of the auxiliary permanent magnet shape and size, reasonable design and combination of HTS magnet, application of an external magnetic field can get high and capture the strength of the magnetic field, effectively improve the superconducting magnetic levitation force characteristics, the result has a guiding role in promoting the practical application of the superconductor. |
| Key words: cone auxiliary permanent magnet, HTSC, levitation force , trapped field |