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Fail Safe, High Temperature Magnetic Bearings

[+] Author Affiliations
Thomas Minihan, Alan Palazzolo, Yeonkyu Kim, Shuliang Lei, Andrew Kenny, Uhn Joo Na, Randy Tucker, Jason Preuss, Andrew Hunt, Bart Carter

Texas A&M University, College Station, TX

Andy Provenza, Gerald Montague, Albert Kascak

NASA Glenn Research Center, Cleveland, OH

Paper No. GT2002-30595, pp. 1107-1116; 10 pages
doi:10.1115/GT2002-30595
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3609-6 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

This paper contributes to the magnetic bearing literature in two distinct areas: high temperature and redundant actuation. Design considerations and test results are given for the first published combined 538°C (1000°F)-high speed rotating test performance of a magnetic bearing. Secondly, a significant extension of the flux isolation based, redundant actuator control algorithm is proposed to eliminate the prior deficiency of changing position stiffness after failure. The benefit of the novel extension was not experimentally demonstrated due to a high active stiffness requirement. In addition, test results are given for actuator failure tests at 399°C (750°F), 12,500rpm. Finally, simulation results are presented confirming the experimental data and validating the redundant control algorithm.

Copyright © 2002 by ASME

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