Prediction of Rotating Losses in Heteropolar Radial Magnetic Bearings

[+] Author and Article Information
David C. Meeker

Gedanken Magnetics, 80 Lanark Rd., Brighton, MA 02146-1843

Eric H. Maslen

Department of Mechanical, Aerospace, & Nuclear Engineering, University of Virginia, Charlottesville, VA 22903

J. Tribol 120(3), 629-635 (Jul 01, 1998) (7 pages) doi:10.1115/1.2834597 History: Received May 28, 1996; Revised May 05, 1997; Online January 30, 2008


Previously, thin plate assumptions have been used to obtain a one-dimensional eddy current model for predicting the stationary, transformer-type losses in magnetic bearings built out of laminated material. Using similar assumptions, as in the 1-D eddy current model, rotating losses can be predicted for a laminated heteropolar radial magnetic bearing. The thin plate model of rotating losses yields a hybrid analytical-boundary element model that is computationally inexpensive to implement. Predictions from this model compare favorably to losses experimentally measured in rotor run-down tests.

Copyright © 1998 by The American Society of Mechanical Engineers
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