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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Magnetic Thrust Bearing Operation and Industrial Pump Application

[+] Author and Article Information
P. E. Allaire, E. H. Maslen, D. W. Lewis, R. D. Flack

Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903

J. Eng. Gas Turbines Power 119(1), 168-173 (Jan 01, 1997) (6 pages) doi:10.1115/1.2815543 History: Received February 04, 1994; Online November 19, 2007

Abstract

Magnetic bearings represent a new bearing technology, which has some advantages over conventional fluid film and wiling element bearings for some applications. The paper describes the basic concepts of magnetic thrust bearing operation involving the magnetic actuator, electronic controls, power amplifier, and sensor. The magnetic actuator is a magnetic circuit, which generates attractive forces. These support the rotating shaft. While it is often thought that magnetic bearings are highly nonlinear devices, this paper demonstrates that they are linear in both the perturbation flux and current when used in a double acting configuration. Electronic feedback controls are used to stabilize the bearing. Example design parameters are presented for an application to an industrial canned motor pump.

Copyright © 1997 by The American Society of Mechanical Engineers
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