The effect of the laminate stacking factor on homopolar magnetic bearing performance is examined. Stacked laminates are used on the bearing rotor and in the stator. These laminate stacks have anisotropic permeability. Equations for the effect of the stacking factor on homopolar bearing position stiffness are derived. Numerical results are calculated and compared to measurements. These results provide an answer for the common discrepancy between test and theory for homopolar magnetic bearing position stiffnesses.
Issue Section:Technical Papers
Keywords:magnetic bearings, laminations, stators, rotors, magnetic anisotropy, magnetic permeability, machine bearings
Topics:Bearings, Laminates, Permeability, Rotors, Stiffness, Stators, Anisotropy
Characteristics of Magnetic Bearings Biased With Permanent Magnets in the Stator,”
JSME Int. J., Ser. C,
Loss Calculation in Laminated Steel Utilizing Anisotropic Magnetic Permability,”
IEEE Trans. Power Appar. Syst.,
Timothy, M. A., and Preston, T. W., 1995, “Finite Element Modeling of Laminated Structures in Electrical Machines,” Proceedings IEE, 7th International Conference on Electrical Machines and Drives, Institution of Electrical Engineers, London, pp. 121–125.
De Weese, R. T., 1996, “A Comparison of Eddy Current Effects in a Single Sided Magnetic Thrust Bearing,” thesis, Texas A&M University, College Station, TX.
Kondoleon, A. S., 2000, “Soft Magnetic Alloys for High Temperature Radial Magnetic Bearings,” Proceedings 7th International Symposium on Magnetic Bearings, ETH-Zurich (Swiss Federal Institute of Technology), Zurich, Switzerland, pp. 111–116.
Beausmeister, T., et al., ed., 1978, Mark’s Standard Handbook for Mechanical Engineers, 8th Ed., McGraw-Hill, New York.
Lamination Steel Technology for Appliance Industry,”
IEEE Trans. Ind. Appl.,
Magnetic Metals Inc., 2000, Tape Wound Core Design Manual, Westiminister, CA.
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