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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

High Temperature Characterization of a Radial Magnetic Bearing for Turbomachinery

[+] Author and Article Information
Andrew J. Provenza

NASA Glenn Research Center, Cleveland, OH 44135-3191e-mail: andrew.j.provenza@nasa.gov

Gerald T. Montague

Army Research Lab, NASA Glenn Research Center, Cleveland, OH 44135e-mail: gerald.t.montague@nasa.gov

Mark J. Jansen

University of Toledo, Toledo, OHe-mail: mark.j.jansen@nasa.gov

Alan B. Palazzolo

Department of Mechanical Engineering, Texas A&M University, College Station, TXe-mail: a-palazzolo@tamu.edu

Ralph H. Jansen

University of Toledo, Toledo, OHe-mail: ralph.h.jansen@nasa.gov

J. Eng. Gas Turbines Power 127(2), 437-444 (Apr 15, 2005) (8 pages) doi:10.1115/1.1807413 History: Received October 01, 2002; Revised March 01, 2003; Online April 15, 2005
Copyright © 2005 by ASME
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References

Figures

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High-temperature magnetic bearing test facility at NASA Glenn Research Center
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Third-generation high-temperature magnetic bearing test rig
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Magnetic bearing at 538°C (1000°F)
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Six load cells supporting the outboard duplex ball bearing
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Maximum load on each magnetic axis is a vector sum of the forces from more than one C-core
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Force capacity for C-core #1 as a function of temperature
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C-core #1 force data plotted on log–log plot
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Force vs current for C-core #2 at 0 rpm
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Force vs current for C-core #2 at 15,000 rpm
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Force versus current and speed at 538°C
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Load measurements at the stator using piezoelectric actuators
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C-core #2 data at 0 rpm plotted on log–log plot
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Force as a function of current and temperature for the #2-3-4 magnetic axes at 0 rpm
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Force as a function of current and temperature for the #2-3-4 magnetic axes at 15,000 rpm
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Power system for one C-core
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Power consumption of C-core #2 at 0 rpm
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Power consumption of magnetic axis #2-3-4 at 0 rpm
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Theoretical gap between stator and rotor as a function of temperature using linear method
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Thermal map (not FEA) of rotor and stator when rig first reaches 538°C
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Thermal map (not FEA) of rotor and stator after rig at 538°C for 2.5 h
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Theoretical force prediction versus actual measured values for C-core #1

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