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.
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January 1997
Research Papers
Magnetic Thrust Bearing Operation and Industrial Pump Application
P. E. Allaire,
P. E. Allaire
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
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E. H. Maslen,
E. H. Maslen
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
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D. W. Lewis,
D. W. Lewis
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
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R. D. Flack
R. D. Flack
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
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P. E. Allaire
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
E. H. Maslen
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
D. W. Lewis
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
R. D. Flack
Department of Mechanical, Aerospace, and Nuclear Engineering, ROMAC Laboratories, University of Virginia, Charlottesville, VA 22903
J. Eng. Gas Turbines Power. Jan 1997, 119(1): 168-173 (6 pages)
Published Online: January 1, 1997
Article history
Received:
February 4, 1994
Online:
November 19, 2007
Citation
Allaire, P. E., Maslen, E. H., Lewis, D. W., and Flack, R. D. (January 1, 1997). "Magnetic Thrust Bearing Operation and Industrial Pump Application." ASME. J. Eng. Gas Turbines Power. January 1997; 119(1): 168–173. https://doi.org/10.1115/1.2815543
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