Fundamental Studies on Characteristic Evaluation and Application of Bulk Superconductor

体超导体特性评价及应用基础研究

• 批准号: 13450116
• 负责人: ISHIYAMA Atsushi
• 金额: $ 4.86万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450116/
• 关键词: Bulk superconductor; Trapped field characteristic; Magnetization characteristic; Characteristic of Magnetic levitation; Magnetic levitating transporter; Linear actuator; Cryogenic vacuum insulating vessel; Finite element analysis; 磁気浮上特性; 磁気搬送装置

1.A new type of active-maglev system is designed and constructed using YBCO bulk and multiple electromagnets. And the continuous levitation was demonstrated with controlling the levitation height using three and five electromagnets systems and electromagnetic behavior within the bulk was investigated using a FEM computer program.2.A magnetic levitating device was proposed with two-dimensional movement, namely a 'levitating X-Y transporter'. For a real design of levitating X-Y transporter, the lift and the restoring force were examined experimentally and a simulation program was newly developed based on the three-dimensional hybrid FE-BE method to analyze the dynamic electromagnetic behaviors of the HTS bulk. Then the relationship between the various forces and distributions of supercurrent and magnetic field was clarified through experiments and numerical simulation. And the design of a levitating transporter was also performed.3.We fabricated and tested a linear synchronous actuator w … More ith double-sided primary and field-cooled YBCO bulk secondary. We experimentally investigated the static characteristic in points of synchronous torque, the starting thrust and the pull-in characteristics. And we developed a simulation program based on FEM to investigate electromagnetic behavior within the bulk exposed to the magnetic field generated by the primary winding.4.The transition of trapped field was experimentally investigated while applying external AC magnetic field with various amplitude and frequency to a disk-shaped YBCO bulk. And the numerical simulation was also performed using a newly developed computer program based on the FEM. The experiment of trapped field attenuation was carried out in long term applying field with a frequency of 50 Hz. The attenuation is abruptly large and finally the trapped field is disappeared. This means that shielding current distribution within the bulk is changed by the time-varying magnetic field and the transient magnetic flux movement results in temperature rise and finally the reduction of the trapped field. Less

1.利用YBCO块体和多个电磁体设计并构建了一种新型主动磁悬浮系统，并通过使用三个和五个电磁体系统控制悬浮高度来演示连续悬浮，并使用有限元计算机研究块体内的电磁行为。方案2.提出了一种具有二维运动的磁悬浮装置，即“悬浮X-Y运输机”。针对悬浮X-Y运输机、升降机和运输机的实际设计。实验检验了恢复力，并基于三维混合FE-BE方法新开发了仿真程序来分析高温超导体的动态电磁行为，从而阐明了各种力与超电流和磁场分布之间的关系。通过实验和数值模拟，还进行了悬浮运输机的设计。3.我们制造并测试了具有双面初级和场冷却YBCO散装次级的线性同步执行器。实验研究了同步扭矩、启动推力和吸合特性方面的静态特性，并开发了基于有限元的仿真程序来研究暴露在初级绕组产生的磁场中的主体内的电磁行为。 4．对圆盘状 YBCO 块体施加不同幅度和频率的外部交流磁场时，捕获场的转变进行了实验研究，并使用新开发的基于有限元衰减的计算机程序进行了数值模拟。长期施加频率为 50 Hz 的磁场，衰减突然变大，最终俘获磁场消失，这意味着随时间变化的磁场改变了体体内的屏蔽电流分布，导致瞬态磁通运动。温度上升，最后俘获场减少。

项目成果

H.Shimizu, H.Ueda, M.Tsuda, A.Ishiyama: "Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field"IEEE Transactions on Applied Superconductivity. 12. 820-823 (2002)

H.Shimizu、H.Ueda、M.Tsuda、A.Ishiyama：“Y-Ba-Cu-O 块体在时变外部磁场中的俘获场特性”IEEE 应用超导学报。

H.Ueda, A.Ishiyama et al.: "Trapped Field Characteristic of HTS Bulk in AC External Magnetic Field"IEEE Trans. on Appl. Supercond.. vol.13, no.2, part2. 2283-2286 (2003)

H.Ueda、A.Ishiyama 等人：“交流外部磁场中 HTS 体的俘获场特性”IEEE Trans。

門 裕之, 石山 敦士 他: "6.6kV級磁気遮へい型超電導限流器の試設計と有限要素法による動作特性評価"電気学会論文誌B. vol.122-B no.8. 944-950 (2002)

Hiroyuki Kado、Atsushi Ishiyama 等人：“6.6kV 级磁屏蔽超导限流器的试验设计以及使用有限元法评估操作特性”IEEJ Transactions B. vol.122-B no.8 (2002)。 ）

Y.Kamiya, M.Akagi, S.Wakao: "Boundary structure for improving performances of single-sided linear induction motors"Journal of Applied Physics. vol.91 no.10. 6988-6990 (2002)

Y.Kamiya、M.Akagi、S.Wakao：“改善单面直线感应电机性能的边界结构”应用物理杂志。

Y.D.Chun, S.Wakao, J.Lee: "Magnetic force characteristics according to the variation of asymmetric overhang ratio in brushless direct current motor"Journal of Applied Physics. vol.93 no.10. 8775-8777 (2003)

Y.D.Chun，S.Wakao，J.Lee：“无刷直流电机中不对称悬伸比变化的磁力特性”应用物理学杂志。