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Proceedings Paper

Magnetostrictive vibration damper and energy harvester for rotating machinery
Author(s): Zhangxian Deng; Vivake M. Asnani; Marcelo J. Dapino
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Paper Abstract

Vibrations generated by machine driveline components can cause excessive noise and structural dam- age. Magnetostrictive materials, including Galfenol (iron-gallium alloys) and Terfenol-D (terbium-iron- dysprosium alloys), are able to convert mechanical energy to magnetic energy. A magnetostrictive vibration ring is proposed, which generates electrical energy and dampens vibration, when installed in a machine driveline. A 2D axisymmetric finite element (FE) model incorporating magnetic, mechanical, and electrical dynamics is constructed in COMSOL Multiphysics. Based on the model, a parametric study considering magnetostrictive material geometry, pickup coil size, bias magnet strength, flux path design, and electrical load is conducted to maximize loss factor and average electrical output power. By connecting various resistive loads to the pickup coil, the maximum loss factors for Galfenol and Terfenol-D due to electrical energy loss are identified as 0.14 and 0.34, respectively. The maximum av- erage electrical output power for Galfenol and Terfenol-D is 0.21 W and 0.58 W, respectively. The loss factors for Galfenol and Terfenol-D are increased to 0.59 and 1.83, respectively, by using an L-C resonant circuit.

Paper Details

Date Published: 1 April 2015
PDF: 11 pages
Proc. SPIE 9433, Industrial and Commercial Applications of Smart Structures Technologies 2015, 94330C (1 April 2015); doi: 10.1117/12.2085566
Show Author Affiliations
Zhangxian Deng, The Ohio State Univ. (United States)
Vivake M. Asnani, NASA Glenn Research Ctr. (United States)
Marcelo J. Dapino, The Ohio State Univ. (United States)

Published in SPIE Proceedings Vol. 9433:
Industrial and Commercial Applications of Smart Structures Technologies 2015
Kevin M. Farinholt; Steven F. Griffin, Editor(s)

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