Geometric Effects on Eddy Current Bearing Performance

[+] Author and Article Information
J. A. Tichy

Department of Mechanical Engineering, Aeronautical Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, N.Y. 12180-3590

K. A. Connor

Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, N.Y. 12180-3590

J. Tribol 111(2), 209-214 (Apr 01, 1989) (6 pages) doi:10.1115/1.3261890 History: Received March 15, 1988; Online October 29, 2009


The properties of magnetic bearings, particularly those based on repulsive forces due to eddy currents, are determined by a complex mixture of electrical and mechanical length and time scales. A perturbation solution for the magnetic field structure based on careful ordering of these parameters has permitted the effects of realistic gap geometries to be analyzed. The load capacity of eddy current journal bearings is found to be somewhat larger than previously predicted in an earlier paper which used magnetic fields based on constant gap size. The present results may be of interest to those concerned with calculating eddy currents in conventional attractive magnetic bearings.

Copyright © 1989 by ASME
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