Magnetostrictive vibration damper and energy harvester for rotating machinery

Zhangxian Deng, Vivake M. Asnani, Marcelo J. Dapino

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

19 Scopus citations

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.

Original languageEnglish
Title of host publicationIndustrial and Commercial Applications of Smart Structures Technologies 2015
EditorsSteven F. Griffin, Kevin M. Farinholt
ISBN (Electronic)9781628415360
DOIs
StatePublished - 2015
Event2015 SPIE Industrial and Commercial Applications of Smart Structures Technologies Conference - San Diego, United States
Duration: 9 Mar 201510 Mar 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9433
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2015 SPIE Industrial and Commercial Applications of Smart Structures Technologies Conference
Country/TerritoryUnited States
CitySan Diego
Period9/03/1510/03/15

Keywords

  • COMSOL Multiphysics
  • Energy harvester
  • Magnetostrictive materials
  • Vibration damper

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