| 旋转超导铌球在磁场中的力矩分析 |
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| 引用本文： | 崔春艳,王秋良,胡新宁,赵尚武.旋转超导铌球在磁场中的力矩分析[J].稀有金属材料与工程,2008(Z4). |
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| 作者姓名： | 崔春艳 王秋良 胡新宁 赵尚武 |
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| 作者单位： | 中国科学院应用超导重点实验室;中国科学院电工研究所;中国科学院研究生院; |
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| 基金项目： | 国家自然科学基金项目(10055001/A050210,50577063) |
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| 摘 要： | 由金属铌制成的超导球体,利用超导体的迈斯纳效应悬浮在球腔中,在外磁场的影响下会有少量俘获磁通存在,本文引入球谐函数计算磁场,分析了俘获磁通和外磁场相互作用后对超导转子产生的干扰力矩。在磁场中旋转的超导球体也会产生一个与转速成比例的伦敦磁场,与外部磁场相互作用从而产生干扰力矩作用于超导球。本文从旋转超导球体的电磁特性和磁场分布入手,计算和分析了伦敦磁矩对旋转超导球体的干扰力矩及对超导球体运动的影响。
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| 关 键 词： | 伦敦磁矩 力矩 超导球体 俘获磁通 球谐函数 |
Analysis of Torque Acting on the Superconducting Spinning Sphere in the Magnetic Field |
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| Cui Chunyan,,Wang Qiuliang,Hu Xinning,Zhao Shangwu.Analysis of Torque Acting on the Superconducting Spinning Sphere in the Magnetic Field[J].Rare Metal Materials and Engineering,2008(Z4). |
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| Authors: | Cui Chunyan Wang Qiuliang Hu Xinning Zhao Shangwu |
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| Affiliation: | Cui Chunyan1,2,3,Wang Qiuliang1,Hu Xinning1,Zhao Shangwu1,3 (1. Key Laboratory of Applied Superconductivity,Chinese Academy of Sciences,Beijing 100080,China) (2. Institute of Electrical Engineering,China) (3. Graduate School of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | Based on the Meissner effect, the superconducting sphere made of niobium is suspended in the spherical housing. Under the influence of external magnetic field, the flux is trapped in the sphere. In this paper we calculate and express the trapped magnetic field in terms of spherical harmonic function, and analyze the disturbing torque generated from the interaction between trapped magnetic field and external field. Meanwhile, the London magnetic dipole moment proportional to spin speed is also generated in t... |
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| Keywords: | London moment torque superconducting sphere trapped flux spherical harmonic function |
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