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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Dynamic Modeling and Validation of a Lorentz, Self-Bearing Motor Test Rig

[+] Author and Article Information
L. S. Stephens, D.-G. Kim

Department of Mechanical Engineering, University of Kentucky, 521 CRMS, Lexington, KY 40506

J. Eng. Gas Turbines Power 125(1), 156-166 (Dec 27, 2002) (11 pages) doi:10.1115/1.1499731 History: Received December 01, 2000; Revised March 01, 2001; Online December 27, 2002
Copyright © 2003 by ASME
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References

Salazar, A. O., Chiba, A., and Fukao, T., 2000, “A Review of Developments in Bearingless Motors,” Proc. 7th Int. Symp. Magn. Bearings, ETH, Zurich, Aug. pp. 335–339.
Chiba,  A., Rahman,  M. A., and Fukao,  T., 1991, “Radial Forces in Bearingless Reluctance Motor,” IEEE Trans. Magn., 27, Mar., p. 786.
Schoeb, R., and Bischel, J., 1994, “Vector Control of Bearingless Motor,” Proc. 4th Int. Symp. Magn. Bearings, ETH Zurich, pp. 327–332.
Okada,  Y., Miyamoto,  S., and Ohishi,  T., 1996, “Levitation and Torque Control of Internal Permanent Magnet Type Bearingless Motor,” IEEE Trans. Control Sys. Tech., 4(5), pp. 565–571.
Carroll, D., Sedgewick, J., and Stephens, L. S., 1999, “Long Life, Fault Tolerant, Spacecraft Sensor Gimbal/Bearing System Final Report,” United States Air Force Research Laboratory/VSDV, Contract No. F29601-98-C-0188, Mar.
Kim, D. G., and Stephens, L. S., 2000, “Fault Tolerance of a Lorentz-Type Slotless, Self Bearing Motor According to the Coiling Schemes,” Proc. 7th Int. Symp. Magn. Bearings, ETH, Zurich, Aug., pp. 219–224.
Steele, B. A., and Stephens, L. S., 2000, “A Test Rig for Measuring Force and Torque Production in a Lorentz, Slotless Self Bearing Motor,” Proc. 7th Int. Symp. Magn. Bearings, ETH, Zurich, Aug., pp. 407–412.
Stephens, L. S., and Kim, D. G., 2000, “Analysis and Simulation of a Lorentz-type, Slotless Self-Bearing Motor,” Proceedings of the 1st IFAC Conference on Mechatronics, Darmstadt, Germany, Sept., Elsevier Sci. Ltd., Amsterdam.
Okada, Y., Konishi, H., Kanebako, H., and Lee, C., 2000, “Lorentz Force Type Self Bearing Motor,” Proc. 7th Int. Symp. Magn. Bearings, ETH Zurich, Aug., pp. 353–358.
Casemore, M. A., and Stephens, L. S., 1999, “Actuator Gains for a Toothless Permanent-Magnet Self-Bearing Motor,” IEEE Trans. Magn., 35 (6).

Figures

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Block diagram for modeling and controller design
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Rotor with first flexible body mode (2792 HZ)
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Self-bearing motor layout
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Control of self-bearing motor
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Conventional active magnetic bearing open-loop transfer functions
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Conventional active magnetic bearing closed-loop transfer functions
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Self-bearing motor radial position direct open-loop transfer functions
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Self-bearing motor angular position open-loop transfer function
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Active magnetic bearing radial sensor to motor radial force transfer function
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Self-bearing motor radial sensor to active magnetic bearing force transfer function
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Self-bearing motor cross-coupled transfer functions for iθ=12 A and θ=11.25 deg
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Self-bearing motor and conventional active magnetic bearing cross-coupled force transfer functions for iθ=12 A and θ=11.25 deg

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