Permanent magnet pairs have negligible friction; however, the levitating member is unstable. In this paper, it is demonstrated that if the other member vibrates in a suitable way, the levitating one may be stable.
Issue Section:Technical Papers
Keywords:magnetic bearings, magnetic levitation, vibrations, machine bearings, mechanical stability, stability, bearing, magnetism, tribology
Topics:Bearings, Stability, Magnetic materials, Magnets
P. F., 2001,
Permanent Magnets and Electromechanical Devices,
Academic Press, New York.
S., 1842, “
On the Nature of the Molecular Forces which Regulate the Constitution of Luminuoferous Ether,”
Trans. Cambridge Philos. Soc.0371-5779,
R., 2005, “
Stability of Permanent Magnet Bearings under Parametric Excitations,”
S., 1994, “
Cuscinetto Magnetico Passivo ad Anelli a Magnetizzazione Assiale,” III° Con. Trib. AIMETA, pp.
J. M. D., 1996,
Rare-Earth For Permanent Magnets,
K., 2001, “
High Energy Product Nd-Fe-B Sintered Magnets Produced by Wet Compacting Process,”
IEEE Trans. Magn.0018-9464,
N. W., 1947,
Theory and Application of Mathieu Functions,
D. E., 1989,
Mechanical Vibrations Analysis and Computation,
Longmans, Green, New York.
E., 2005, “
Passive Magnetic Bearings. Low Instability and Possible Stability,” 3° World Tribology Congress, CD2.
Copyright © 2007
by American Society of Mechanical Engineers