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Application of ceramic superconductors in high speed turbinesA turbine system was modified to adapt melt textured YBa2Cu3O(7-delta) (YBCO) with high energy permanent magnets to form a hybrid superconducting magnetic bearing (HSMB). The HSMB/turbine prototype has achieved a static axial thrust capacity exceeding 41 N/sq cm (60 psi) and a radial magnetic stiffness of 7 N/mm in a field cooled state at 77 K. A comparison was made between different configurations of magnets and superconductor for radial stability, axial instability, and force hystereses. This systematic study lead to a greater understanding of the interactions between YBCO and high energy permanent magnets to define design parameters for high rotational devices using the HSMB design.
Document ID
19920018548
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mcmichael, C. K.
(Houston Univ. TX., United States)
Lamb, M. A.
(Houston Univ. TX., United States)
Lin, M. W.
(California Inst. of Tech. Pasadena., United States)
Ma, K. B.
(Houston Univ. TX., United States)
Chu, W. K.
(Houston Univ. TX, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1992
Publication Information
Publication: NASA. Langley Research Center, International Symposium on Magnetic Suspension Technology, Part 2
Subject Category
Nonmetallic Materials
Accession Number
92N27791
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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