Abstract
We have designed, built and tested a prototype of a conduction cooled HTSC bearing module. A superconducting ring, measuring ∅ 102 mm × 13 mm high was assembled from HTSC bulk material. Total mass is 547 g. Lifting force and stability at 77 K and 2 mm gap are approximately 150 N and 80 N/mm, respectively. The superconductor is integrated on a metallic cold plate. Modelling has been used for evaluation of thermal losses and optimization of the cryogenic design. For the present module, total losses at 0.01 Pa insulation vacuum are as small as 1 W, mainly due to radiation. Based on the thermal model the scaling behavior with respect to thermal losses as a function of maximum lifting capability was evaluated. The cooling power was found to be equivalent to about 400 mW electrical power per kg of levitated mass which compares quite favorably to the typical 0.1 …1 W per kg for conventional active magnetic bearings. Details of both experimental work and modelling will be reported.
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References
H. J. Bornemann, Th. Burghardt, W. Hennig, and A. Kaiser, Processing technique for fabrication of advanced YBCO bulk materials for industrial applications, IEEE Transact. Appl. Supercond. 7:1805 (1997).
FZK Internet Online Product Information: www.infp.fzk.de/wheel/english/home.htm
S. Gauss and S. Elschner, Levitation and magnetic properties of melt processed high temperature superconductor cylinders, in “Proceed. 4th Int. Symp. Magn. Bearings,” G. Schweitzer, R. Siegwart, and R. Herzog, eds, Zürich, Switzerland, (1994), p.435.
P. Boegler, C. Urban, H. Rietschel, and H. J. Bornemann, Standardized measurements of interaction forces in autostable superconducting magnetic bearings, Appl. Supercond. 2:915 (1994).
FZK Test Bench Model TB-STML-ZM04
“VDI Wärmeatlas,”Verein Deutscher Ingenieure, Düsseldorf, Germany (1991)
“Handbuch Kryotechnik BW 41–07-03,” VDI Bildungswerk, Düsseldorf, Germany (1975).
K. Gieck. “Technische Formelsammlung,” Gieck Verlag, Heilbronn, Germany (1989).
C. Uher, Thermal Conductivity of High-Tc Superconductors, Journ. of Supercond. 3:337 (1990)
V. V. Nemoshalenko, F. H. Brandt, A.A. Kordyuk, and B.G. Nikitin, Dynamics of a permanent magnet levitated above a high-Tc superconductor, Physica C 170:481 (1990).
H. J. Bornemann, T. Ritter, C. Urban, O. Zaitsev, K. Weber, and H. Rietschel, Low friction in a flywheel with superconducting magnetic bearings, Appl. Supercond. 2:439 (1995).
A. Chambers, R. K. Fitch, and B. S. Halliday. “Basic Vacuum Technology,”Adam Hilger, Bristol and New York (1989).
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Bornemann, H.J., Fieger, W., Weindl, A., Kaiser, A.W., Koch, R. (1998). Conduction Cooled High-Temperature Superconducting Magnetic Bearing Module. In: Kittel, P. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 43. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9047-4_84
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DOI: https://doi.org/10.1007/978-1-4757-9047-4_84
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