Magnetic Thrust Bearing Concepts: Tests and Analyses

The rotor/stator configurations considered are washer-shaped laminate stack (WL), tape-wound laminate stack (TL), U-shaped laminate stack (UL), solid metal (S), and solid wedge pieces. Since preloading reduces rotor vibration, the effects of preloading a WL rotor and TL stator system on the flux den...

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Bibliographic Details
Published in:Journal of intelligent material systems and structures 1998-02, Vol.9 (2), p.81-86
Main Authors: de Weese, R. T., Palazzolo, A. B., Chinta, M., Kascak, A.
Format: Article
Language:English
Subjects:
Applied sciences
Bearings, bushings, rolling bearings
Drives
Exact sciences and technology
Mechanical engineering. Machine design
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Summary:The rotor/stator configurations considered are washer-shaped laminate stack (WL), tape-wound laminate stack (TL), U-shaped laminate stack (UL), solid metal (S), and solid wedge pieces. Since preloading reduces rotor vibration, the effects of preloading a WL rotor and TL stator system on the flux density/input current transfer function magnitude and phase are determined from tests. Since eddy currents result in power loss and phase lag, tests are performed on four rotor/stator pairs, i.e., WL/TL, TL/TL, TL/UL, and S/S, to find the one with minimal eddy currents. For S/S, the test results are compared with those obtained from a two-dimensional finite element analysis, for Silicon-Iron and Hiperco-27. Since overhanging the rotor beyond the stator is a common practice, the effect of this on the fringing of magnetic flux is studied using finite element analysis.
ISSN:1045-389X
1530-8138
DOI:10.1177/1045389X9800900201