A novel eddy current damper: theory and experiment

A novel eddy current damper is developed and its damping characteristics are studied analytically and experimentally. The proposed eddy current damper consists of a conductor as an outer tube, and an array of axially magnetized ring-shaped permanent magnets separated by iron pole pieces as a mover....

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2009-04, Vol.42 (7), p.075001-075001 (6); [np]
Main Authors: Ebrahimi, Babak, Khamesee, Mir Behrad, Golnaraghi, Farid
Format: Article
Language:English
Subjects:
Applied classical electromagnetism
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:A novel eddy current damper is developed and its damping characteristics are studied analytically and experimentally. The proposed eddy current damper consists of a conductor as an outer tube, and an array of axially magnetized ring-shaped permanent magnets separated by iron pole pieces as a mover. The relative movement of the magnets and the conductor causes the conductor to undergo motional eddy currents. Since the eddy currents produce a repulsive force that is proportional to the velocity of the conductor, the moving magnet and the conductor behave as a viscous damper. The eddy current generation causes the vibration to dissipate through the Joule heating generated in the conductor part.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/42/7/075001