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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Self-Sensing in Fault Tolerant Magnetic Bearings

[+] Author and Article Information
D. Montie, E. Maslen

Department of Mechanical, Aerospace, And Nuclear Engineering, University of Virginia, Thornton Hall, McCormick road, Charlottesville, VA 22903-2442

J. Eng. Gas Turbines Power 123(4), 864-870 (Mar 01, 1999) (7 pages) doi:10.1115/1.1383257 History: Received October 01, 1998; Revised March 01, 1999
Copyright © 2001 by ASME
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References

Iannello, V., “Sensorless Position Detector for an Active Magnetic Bearing,” U.S. patent pending, application No. 08/138, 217.
Mizuno, T., Bleuler, H., Gähler, C., and Vischer, D., 1992, “Towards Practical Applications of Self-Sensing Magnetic Bearings,” Proceedings of the Third International Symposium on Magnetic Bearings, Tokyo, Japan, Aug., Technomic Publishing Co., Lancaster, PA.
Noh, M. D., 1996, “Self-Sensing Magnetic Bearings Driven by a Switching Power Amplifier,” Ph.D. dissertation, University of Virginia.
Vischer, D., and Bleuler, H., 1992, “A New Approach to Sensorless and Voltage Controlled AMBs Based on Network Theory Concepts,” Proceedings of the Second International Symposium on Magnetic Bearings, Tokyo, July 12–14, Technomic Publishing Company, Lancaster, PA, pp. 301–306.
Demarest, K. R., 1998, Engineering Electromagnetics, Prentice-Hall, Englewood Cliffs, NJ.
Meeker, D. C., 1996, “Optimal Solutions to the Inverse Problem in Quadratic Magnetic Actuators,” Ph.D. dissertation, University of Virginia.
Keith, F. J., Maslen, E. H., Humphris, R. R., and Williams, R. D., 1990, “Switching Power Amplifier Design for Magnetic Bearings,” Proceedings of the Second International Symposium on Magnetic Bearings, Tokyo, Japan, July 12–14, Technomic Publishing Company, Lancaster, PA, pp. 211–218.
Green, M., and Limebeer, D. J. N., 1995, Linear Robust Control, Prentice-Hall, Englewood Cliffs, NJ.

Figures

Grahic Jump Location
Symmetric eight-pole magnetic actuator
Grahic Jump Location
Three-pole stator with a decoupling choke
Grahic Jump Location
Sequence of signals in envelope filter
Grahic Jump Location
Parameter estimation scheme
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Simulation results for run 5: two coils failed
Grahic Jump Location
No-fault controller Bode plot at 50 micron input displacement magnitude

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