Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/821

Title

Theoretical comparison of motional and transformer EMF device damping efficiency

Author(s)

Graves, Kynan E.;  Iovenitti, Pio G.;  Toncich, Dario J.

Abstract

In this paper, theoretical comparison between electromagnetic dampers based on a “motional emf” and “transformer emf” design is presented. Transformer emf devices are based on the generation of emf in a stationary circuit, in which the emf is generated by a time-varying magnetic field linking the circuit. Motional emf devices are based on the generation of emf due to a moving conductor within a stationary magnetic field. Both of these designs can be used as damping elements for applications such as semi-active and regenerative vehicle suspension systems. The findings herein are provided so as to evaluate the most efficient device for such applications. The analysis consists of comparing the damping coefficient of the electromagnetic devices for a given magnetic field and given volume of conducting material. It has been found that for a limited range of dimensions, the transformer emf devices can be more then 1·2 times as efficient as the motional emf devices. However, for most realistic situations, motional emf devices will have the highest efficiency.

Publication type

Journal article

Research centre

Swinburne University of Technology. Industrial Research Institute Swinburne

Source

Journal of sound and vibration, Vol. 233, no. 3 (June 2000), pp. 441-453

Publication year

2000

Publisher

Academic Press

Format

pp. 441-453

ISSN

0022-460X

Publisher URL

http://dx.doi.org/10.1006/jsvi.1999.2820

Copyright

© Copyright 2000 Academic Press. All rights reserved.

Peer reviewed