This paper deals with the dynamic analysis of the magnetic bearing stack system. The stack consists of a single flywheel supported by two magnetic bearings. To model the system, the dynamic equations of a magnetically suspended flywheel are derived. Next, the four control systems controlling the four degrees-of-freedom of the stack are incorporated into the model. The resulting dynamic equations are represented as first-order differential equations in a matrix form. A computer simulation program was then used to simulate the working of the magnetic bearing stack. Real time plots from the simulation are used to show the effect of dynamic coupling on torque response. Frequency response is used to determine the resonance frequencies of the stack system. It is found that system stability depends on flywheel speed. On the basis of the above results suggestions are made to improve stability and allow the stack to be spun beyond 60,000 rpm.
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February 1991
Research Papers
Rotor Dynamics of Flywheel Energy Storage Systems
C. P. Jayaraman,
C. P. Jayaraman
Fairchild Space, Germantown, MD 20874
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J. A. Kirk,
J. A. Kirk
Department of Mechanical Engineering and The Systems Research Center, University of Maryland, College Park, MD 20742
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D. K. Anand,
D. K. Anand
Department of Mechanical Engineering and The Systems Research Center, University of Maryland, College Park, MD 20742
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M. Anjanappa
M. Anjanappa
University of Maryland—UMBC, Baltimore, MD 21228
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C. P. Jayaraman
Fairchild Space, Germantown, MD 20874
J. A. Kirk
Department of Mechanical Engineering and The Systems Research Center, University of Maryland, College Park, MD 20742
D. K. Anand
Department of Mechanical Engineering and The Systems Research Center, University of Maryland, College Park, MD 20742
M. Anjanappa
University of Maryland—UMBC, Baltimore, MD 21228
J. Sol. Energy Eng. Feb 1991, 113(1): 11-18 (8 pages)
Published Online: February 1, 1991
Article history
Received:
August 1, 1989
Revised:
September 17, 1990
Online:
June 6, 2008
Citation
Jayaraman, C. P., Kirk, J. A., Anand, D. K., and Anjanappa, M. (February 1, 1991). "Rotor Dynamics of Flywheel Energy Storage Systems." ASME. J. Sol. Energy Eng. February 1991; 113(1): 11–18. https://doi.org/10.1115/1.2929944
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