The design and initial testing of a five axis magnetic bearing system in an energy storage flywheel is presented. The flywheel is under development at the University of Texas Center for Electromechanics (UT-CEM) for application in a transit bus. The bearing system for the prototype features homopolar permanent magnet bias magnetic bearings. The system has been successfully tested to the maximum design speed of 42,000 rpm. A gain-scheduled, MIMO control algorithm was required to control the system modes affected by rotor gyroscopics. The implementation and basis for this control scheme is discussed. The cross-axis forces produced by this approach are described in terms of circumferential cross-coupled stiffness and damping to explain the effect on system stability. Dynamic test results are discussed relative to the rotordynamic and control system design.
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ASME Turbo Expo 2000: Power for Land, Sea, and Air
May 8–11, 2000
Munich, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7857-6
PROCEEDINGS PAPER
Analysis and Testing of a Magnetic Bearing Energy Storage Flywheel With Gain-Scheduled, MIMO Control
Lawrence A. Hawkins,
Lawrence A. Hawkins
CalNetix, Inc., Torrance, CA
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Brian T. Murphy,
Brian T. Murphy
University of Texas, Austin, TX
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John Kajs
John Kajs
University of Texas, Austin, TX
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Lawrence A. Hawkins
CalNetix, Inc., Torrance, CA
Brian T. Murphy
University of Texas, Austin, TX
John Kajs
University of Texas, Austin, TX
Paper No:
2000-GT-0405, V004T03A047; 8 pages
Published Online:
August 4, 2014
Citation
Hawkins, LA, Murphy, BT, & Kajs, J. "Analysis and Testing of a Magnetic Bearing Energy Storage Flywheel With Gain-Scheduled, MIMO Control." Proceedings of the ASME Turbo Expo 2000: Power for Land, Sea, and Air. Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education. Munich, Germany. May 8–11, 2000. V004T03A047. ASME. https://doi.org/10.1115/2000-GT-0405
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