A Stability Space of a Magnetomechanical Bearing

[+] Author and Article Information
Roberto Bassani

Dipartimento di Costruzioni Meccaniche, Nucleari e della Produzione, University of Pisa – Italy, Via Diotisalvi, 2, Pisa, Italybassani@ing.unipi.it

J. Dyn. Sys., Meas., Control 129(2), 178-181 (Jun 19, 2006) (4 pages) doi:10.1115/1.2431812 History: Received July 25, 2005; Revised June 19, 2006

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.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Systems with two degrees of freedom: (a) mechanical and (b) magnetomechanical

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Figure 2

(a) Mathieu earth and (b) sector of interest

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Figure 3

Magnetic ring pairs, forces and stiffness versus gap

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Figure 4

Magnetic ring bearing borne by a steel spring

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Figure 5

Radial time history of the levitated ring

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Figure 6

Magnetic ring: (a) Measured flux density (b) Flaw



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