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The influence of inner diameter of hollow cylindrical permanent magnet on the levitation force of single domain GdBCO bulk superconductor is investigated by measuring the levitation force between the hollow cylindrical permanent magnet and the single domain GdBCO bulk superconductor. The results show that the levitation force is closely related to the inner diameter of the hollow cylindrical permanent magnet when the inner diameter (d) increases from 0 mm to 26 mm (minimum measuring gap distance Z=2 mm), and all the superconducting magnetic levitation force curve shows magnetic hysteresis phenomenon. With the increase of the inner diameter of the hollow cylindrical permanent magnet, the levitation force at a minimum distance decreases gradually from 14.8 N at d=0 mm to -0.1 N at d=26 mm. The levitation force at the minimum gap distance is negative when d ≥ 20 mm. When 0 mm ≤ dd ≥ 5 mm. The larger magnetic field strength of the superconductor can be obtained, and the levitation force can be effectively improved by the scientific and reasonable designing of the permanent magnet structure. The results have certain guiding significance for designing and optimizing the magnetic suspension bearing system, ring track and superconductor.
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[14] Alvaro S, Carles N 2001 Phys. Rev. B 64 214506
[15] Yang W M, Zhou L, Feng Y 2001 Physica C 34 5
[16] Nuria D V, Alvaro S, Enric P 2007 Appl. Phys. Lett. 90 042503
[17] Ma J, Yang W M 2011 Acta Phys. Sin. 60 077401 (in Chinese) [马俊, 杨万民 2011 物理学报 60 077401]
[18] Ma J, Yang W M, Li G Z 2011 Acta Phys. Sin. 60 027401 (in Chinese) [马俊, 杨万民, 李国政 2011 物理学报 60 027401]
[19] Ma J, Yang W M, Li J W 2012 Acta Phys. Sin. 61 137401 (in Chinese) [马俊, 杨万民, 李佳伟 2012 物理学报 61 137401]
[20] Ma J, Yang W M, Wang M 2013 Acta Phys. Sin. 62 227401 (in Chinese) [马俊, 杨万民, 王妙 2013 物理学报 62 227401]
[21] Cheng X F, Yang W M, Li G Z 2010 Chin. J. Low Temperature Phys. 32 150 (in Chinese) [程晓芳, 杨万民, 李国政 2010 低温物理学报 32 150]
[22] Yang W M, Chao X X, Shu Z B, Zhu S H, Wu X L, Bian X B, Liu P 2006 Physica C 347 445
[23] Cheng S L, Yang W M, Zhou L, Li J W 2014 Physica C 496 39
[24] Guo L P, Yang W M, Guo Y X, Chen L P, Li Q 2015 Acta Phys. Sin. 64 077401 (in Chinese) [郭莉萍, 杨万民, 郭玉霞, 陈丽平, 李强 2015 物理学报 64 077401]
[25] Wang M, Yang W M, Li J W, Feng Z L, Yang P T 2015 Supercond. Sci. Technol. 28 035004
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[1] John R H, Shaul H, Tomotake M 2005 Supercond. Sci. Technol. 18 S1
[2] Miyagawa Y, Kameno H, Takahata R 1999 IEEE Trans. Appl. Supercond. 9 996
[3] Nuria D V, Alvaro S, Carles N 2008 Appl. Phys. Lett. 92 042505
[4] Wang J S, Wang S Y 2002 Physica C 378-381 809
[5] Sha J J, Yao Z W 2000 Acta Phys. Sin. 49 1356 (in Chinese) [沙建军, 姚仲文 2000 物理学报 49 1356]
[6] Feng Y, Zhou L, Yang W M, Zhang C P 2000 Acta Phys. Sin. 49 146 (in Chinese) [冯勇, 周廉, 杨万民, 张翠萍 2000 物理学报 49 146]
[7] Takahashi K, Ainslie M D, Fujishiro H, Naito T 2017 IEEE Trans. Appl. Supercon. 27 1
[8] Shi Y, Babu N H, Iida K, Cardwell D A 2007 IEEE Trans. Appl. Supercond. 17 2984
[9] Yang W M, Zhou L, Feng Y 1999 Chin. J. Low. Temp. Phys. 21 351 (in Chinese) [杨万民, 周廉, 冯勇 1999 低温物理学报 21 351]
[10] Wang M, Yang W M, Yang P T, Wang X M, Zhang M, Hu C X 2016 Acta Phys. Sin. 65 227401 (in Chinese) [王妙, 杨万民, 杨芃焘, 王小梅, 张明, 胡成西 2016 物理学报 65 227401]
[11] Zhu M, Ren Zh Y, Wang S Y 2002 Chin. J. Low Temperature Phys. 24 213 (in Chinese) [朱敏, 任仲友, 王素玉 2002 低温物理学报 24 213]
[12] Carles N, Alvaro S 2001 Phys. Rev. B 64 214507
[13] Zhang F Y, Huang S L, Cao X W 1989 Acta Phys. Sin. 39 830 (in Chinese) [张凤英, 黄孙利, 曹效文 1989 物理学报 39 830]
[14] Alvaro S, Carles N 2001 Phys. Rev. B 64 214506
[15] Yang W M, Zhou L, Feng Y 2001 Physica C 34 5
[16] Nuria D V, Alvaro S, Enric P 2007 Appl. Phys. Lett. 90 042503
[17] Ma J, Yang W M 2011 Acta Phys. Sin. 60 077401 (in Chinese) [马俊, 杨万民 2011 物理学报 60 077401]
[18] Ma J, Yang W M, Li G Z 2011 Acta Phys. Sin. 60 027401 (in Chinese) [马俊, 杨万民, 李国政 2011 物理学报 60 027401]
[19] Ma J, Yang W M, Li J W 2012 Acta Phys. Sin. 61 137401 (in Chinese) [马俊, 杨万民, 李佳伟 2012 物理学报 61 137401]
[20] Ma J, Yang W M, Wang M 2013 Acta Phys. Sin. 62 227401 (in Chinese) [马俊, 杨万民, 王妙 2013 物理学报 62 227401]
[21] Cheng X F, Yang W M, Li G Z 2010 Chin. J. Low Temperature Phys. 32 150 (in Chinese) [程晓芳, 杨万民, 李国政 2010 低温物理学报 32 150]
[22] Yang W M, Chao X X, Shu Z B, Zhu S H, Wu X L, Bian X B, Liu P 2006 Physica C 347 445
[23] Cheng S L, Yang W M, Zhou L, Li J W 2014 Physica C 496 39
[24] Guo L P, Yang W M, Guo Y X, Chen L P, Li Q 2015 Acta Phys. Sin. 64 077401 (in Chinese) [郭莉萍, 杨万民, 郭玉霞, 陈丽平, 李强 2015 物理学报 64 077401]
[25] Wang M, Yang W M, Li J W, Feng Z L, Yang P T 2015 Supercond. Sci. Technol. 28 035004
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