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It has been investigated that the interaction force between a cubic permanent magnet PM1 and a GdBCO bulk (HTSC) superconducting permanent magnet (SCPM) magnetized by a cubic permanent magnet PM2 under different configurations at 77 K. Two configurations were used for the magnetization of the GdBCO bulk, one is that the North pole of the PM2 is in upward direction, the other is in downward direction, so that the North pole of the SCPM is in two states SCPM↑ and SCPM↓; the vertical distance between the bottom surface of PM1 and the top surface of SCPM is kept as a constant value, but the PM2 can be fixed at any positions (x) along a diameter of the GdBCO bulk during the magnetization process. It is found that: for the PM1↓-SCPM↑ configuration, the maximum levitation force is increasing from 16.7 N to 23.1 N when x increases from –15 mm to 0, and then decreases to 16.6 N when x further increases to 15 mm; but for the PM1↓-SCPM↓ configuration, the maximum levitation force is decreasing from 17.7 N to 7 N when x increases from –15 mm to 0, and then increases to 17.6 N when x further increases to 15 mm. These results are not only much different in the two configurations, but also much different from the maximum levitation force 17.1 N of the sample under zero field cooled condition, which is closely related with the trapped field distribution of the SCPM at different x values. These results indicate that the levitation force of high temperature bulk superconductors can be effectively improved by introducing additional permanent magnet based on scientific and reasonable designing of the system configurations, which is very important during the practical design and applications of superconducting magnetic levitation systems.
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Keywords:
- single domain GdBCO /
- permanent magnet /
- trapped field /
- levitation force
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[18] Yang W M, Chao X X, Ma J, Li G Z 2010 J. Supercond. Nov. Magn. 23 1007
[19] Wang M, Yang W M, Ma J, Tang Y N 2012 Sci. Sin. Phys. Mech. Astron. 42 346 (in Chinese) [王妙, 杨万民, 马俊, 唐艳妮 2012 中国科学: 物理学, 力学, 天文学 42 346]
[20] Wang M, Yang W M, Zhang X J, Tang Y N 2012 Acta Phys. Sin. 61 196102 (in Chinese) [王妙, 杨万民, 张晓菊, 唐艳妮 2012 物理学报 61 196102]
[21] 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]
[22] 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]
[23] 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]
[24] Yang W M, Zhou L, Feng Y, Zhang P X 2003 Physica C: Superconductivity 398 141
[25] Zhang X Y, Zhou J, Zhou Y H 2009 Supercond. Sci. Technol. 22 1
[26] Deng Z, Zheng J, Song H 2007 IEEE Trans. Appl. Supercond. 17 2071
[27] He Q Y, Wang J S, Wang S Y 2009 Physica C 469 91
[28] Tsuda M, Kawasaki T, Yagai T 2008 J. Phys. 97 1
[29] 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]
[30] Yang W M, Chao X X, Shu Z B 2006 Physica C 445–448 347
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[1] John R H, Shaul H, Tomotake M 2005 Supercond. Sci. Technol. 18 S1
[2] Werfel F N, Floegel-Delor U, Rothfeld R 2005 Supercond. Sci. Technol. 18 S19
[3] Koshizuka N 2006 Physica C 1103 445
[4] Miyagawa Y, Kameno H, Takahata R 1999 IEEE. Trans. Appl. Supercond. 9 996
[5] Nuria D V, Alvaro S, Carles N 2008 Appl. Phys. Lett. 92 042505
[6] Wang J S, Wang S Y 2002 Physica C 378–381 809
[7] Ewoud V W, Yamamoto A, Toshiro H 2009 Precision Engineer. 33 217
[8] Yang W M, Zhou L, Feng Y, Zhang P X, Zhang C P 2002 Cryogenics 42 589
[9] Koblischka A V, Mcklich F, Koblischka M R 2002 Cryst. Engineer. 5 411
[10] Chan W C 2003 Physica C: Superconductivity 390 27
[11] Zhu M, Ren Z 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] He G L, He Y W, Zhao Z G, Liu M 2006 Acta Phys. Sin. 55 839 (in Chinese) 55 839 [何国良, 贺延文, 赵志刚, 刘楣 2006 物理学报 55 839]
[13] Zhou J, Zhang X Y, Zhou Y H 2009 Physica C: Superconductivity 469 207
[14] Cheng T L, Shih C L 2006 J. Magnet. Magnet. Mater. 304 454
[15] Zhang F Y, Huang S L, Cao X W 1989 Acta Phys. Sin. 38 830 (in Chinese) [张凤英, 黄孙利, 曹效文 1989 物理学报 38 830]
[16] Nuria D V, Alvaro S, Enric P 2007 Appl. Phys. Lett. 90 042503
[17] Wang F, Sun G Q, Kong X M 2001 Acta Phys. Sin. 50 1590 (in Chinese) [王峰, 孙国庆, 孔祥木 2001 物理学报 50 1590]
[18] Yang W M, Chao X X, Ma J, Li G Z 2010 J. Supercond. Nov. Magn. 23 1007
[19] Wang M, Yang W M, Ma J, Tang Y N 2012 Sci. Sin. Phys. Mech. Astron. 42 346 (in Chinese) [王妙, 杨万民, 马俊, 唐艳妮 2012 中国科学: 物理学, 力学, 天文学 42 346]
[20] Wang M, Yang W M, Zhang X J, Tang Y N 2012 Acta Phys. Sin. 61 196102 (in Chinese) [王妙, 杨万民, 张晓菊, 唐艳妮 2012 物理学报 61 196102]
[21] 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]
[22] 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]
[23] 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]
[24] Yang W M, Zhou L, Feng Y, Zhang P X 2003 Physica C: Superconductivity 398 141
[25] Zhang X Y, Zhou J, Zhou Y H 2009 Supercond. Sci. Technol. 22 1
[26] Deng Z, Zheng J, Song H 2007 IEEE Trans. Appl. Supercond. 17 2071
[27] He Q Y, Wang J S, Wang S Y 2009 Physica C 469 91
[28] Tsuda M, Kawasaki T, Yagai T 2008 J. Phys. 97 1
[29] 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]
[30] Yang W M, Chao X X, Shu Z B 2006 Physica C 445–448 347
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