Magnetic Levitation Experiment of Ferromagnetic Block using by fwg31028

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									 J. Fac. Sci. Tech., Seikei Univ.
 Vol.46 No.1 (2009) pp.13-18




                                                                                  

                       Magnetic Levitation Experiment of Ferromagnetic Block using
                        Trapped Field in Bulk High Temperature Superconductors

                      Ryoma HIGUCHI 1, Takeshi ISHIGOHKA 2, Akira NINOMIYA 3,

       ABSTRACT By trapped field in bulk high temperature superconductor (HTS), restoring force acts
       between iron and bulk superconductor so as to keep the position between them constant. If we could
       utilize this force, it would be possible to realize a low cost magnetic levitation transport system without
       using high cost rare earth permanent magnets. In order to confirm this idea, the authors carried out an
       experiment to levitate an iron block in the space between two bulk superconductors as the first step. The
       experimental result confirmed this levitation principle. In this paper, an experimental result of levitation
       experiment is presented.

       Keywords      magnetic levitation, high temperature superconductor, iron block, pinning effect

                                                                                               Received March 2, 2009


                                                                            1
                                                                                              ¾
              (High Temperature Superconductor       HTS)


                                                                                                             10-20mm,
                                                                      10-20mm


             ¾
                                                          ¾




         [1]-[3]   Mixed-   [4],[5]


                                    (   )
                                                  [6]-[9]




*1

*2                                  (ishigoka@st.seikei.ac.jp)
                                                                                                        ˜*OO
*3




                                                                 
                                                      *65
                                                HTS
                                                                [2],[3]
       2                   Z
                                                   4


                                                                                                      ¾
           2                       
                 YZ


  (Z           )
                                                                           1
                                         2




                                                               4                    (Y    )




                                                                   Z




                                                      *65
                                                     5                              HTS                    6


                                                Gd-QMG bulk                               66mm             20mm(   66
                                            ˜H20)
                                                     C             5     Z                    ab       XY
                                                                                6         C
                                                           (WEM)
               


                                                1) 2
                                            20mm


                                                2)                  5A
                                                                                                   (
                                                )
                                               3)




                                                                                          80mm
                                                                               68.5mm
                                                    35[mT/A]           Z
                   




                                       
                                                               (       8)
                                                       THS119
                                                               (                 )           (    9)
                                                              XY                         (   0.5mm          )             ¾
                                                                        (X           )
                                                                             XY
                                             å




                                                                                                           ¾
                       *65




                                                                             




                


                                                     
        7                                                     10                                       Gap
7           Gap                           g                                                            (g       5mm        )
                                                                                 (               10,15,20mm           )
                                                              10(a)              10,15˜H15mm
    Z
                                                               20˜H15mm
                              (h1   h2)                                                                                   20
                                ¾                      ˜H15mm



                                                  
                                                                           Gap:25mm
                                                                            12


                     10(b)                       20mm                                 10,15˜H20mm          Gap     30, 34mm
                                                                                  12                               15mm
            20mm                                                                                               (          0
                                                                       )         10mm
                                                                                                                          Gap   30mm


                                                                                                     Gap   34mm




 (a) Gap:25mm, iron cylinder size:        10,15,20˜H15mm




 (b) Gap:30mm, iron cylinder size:        10,15,20˜H20mm
            


 
       11     10˜H10mm


                             Z               ¾              0                            ˜*OO
                                      ¾
                     A                                  Z


            WEM
                             11
                 (       )                          (Gap)
20mm


25mm




                                                                                      


                                                                      
                                                                                                       15˜H20mm
        2.3                                                                                    Gap     30mm
                                                                                                                      2
                                  Gap:20mm                             h1(        7             ¾), h2(    7          ¾)
                                                                       13



                                                                
¾     A          ¾                                                      15
                                                    13(a)                         A
            Z=     1.5mm        ¾                                                 ¾               X=   3, 0
    (X=r7.5mm        ¾)                                          ¾
                                                                                                       X=     7(
                                            13(b)                            )                          X=0
                                                                 X=-3                       X=0




                     (a) left side                                        




                                                                               )CROO


                     (b) right side
        ˜*OO


    14                           10˜H10mm
¾


             Gap      23mm              5A
14




                                                                           )CROO



                                                            
          16    Gap     30mm       34mm                                   EEE Transactions on Applied Superconductivity,
                                                                          Vol. 9, No.2, June 1999
                                       Gap                          =?   T. Takao, A. Niiro, S. Suzuki, M. Hashimoto, H.
                                                                          Kamijo, and H. Fujimoto “Experimental and
                                                                          Numerical Analysis of Lift Force in Magnetic
                                  mm                                      Levitation System” IEEE Transactions on Applied
                                                                          Superconductivity, Vol. 15, No.2, June 2005
                                                                    =?
      
                                                                              ¾                  
                              2                                                                0Q2R R
                                                                    =?


                                                                                  79   2008
                             XY                                           0Q2R
                                                                    =?   Ryoma Higuchi, Akira Ninomiya, and Takeshi
                                                                          Ishigohka, “Levitation Experiment of Iron Block
                                                                          using Pinning Flux in HTS Bulk Material.” IEEE
                                                                          Transactions on Applied Superconductivity. Aug,
                                                                          2008 in Chicago
                                                                    [9]


                                                                                                          , ASC-09-19, 2009
                                                                          2
                                                   (   )
          





[1]       H. Ohsaki, M. Takabatake, and E. Masada, “Stable
          Magnetic Levitation of Soft Ferromagnetic
          Materials by Flux Pinning of Bulk Superconductors”
          IEEE Transactions on Magnetics, Vol. 33, No. 5,
          September 1997
=?
                      ,E$
                                                   #5%
          .& RR
=?
                                                           ,
          8QN RR 
[4]       Y. Fukasawa, and H. Ohsaki, “Three-Dimensional
          Structure of Magnetic Field in the Mixed-
          Levitation System using Bulk Superconductors”




                                                               

								
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