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Modeling and design of magnetostrictive vibration‐powered generator using finite element method
Author(s) -
Rezaeealam Behrooz,
Ueno Toshiyuki,
Yamada Sotoshi
Publication year - 2012
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1866
Subject(s) - magnetostriction , finite element method , unimorph , vibration , generator (circuit theory) , energy harvesting , structural engineering , mechanical engineering , materials science , bimorph , energy (signal processing) , piezoelectricity , acoustics , engineering , magnetic field , composite material , power (physics) , cantilever , physics , quantum mechanics
This work investigates the design of a vibration‐powered generator with one rod (unimorph) of iron–gallium (galfenol) and compares it with its two‐rod (bimorph) counterpart. Galfenol is a promising magnetostrictive material that combines high magnetic susceptibility and desirable mechanical properties and therefore very suitable for harvesting the vibration energy that involves bending stresses. In this study, an energy‐based magnetoelastic model, so‐called Armstrong model, is employed to predict the behavior of galfenol under multiaxial stresses. The Armstrong model of galfenol is implemented into a static 3D finite element model of the energy harvester by which the performances of the devices are predicted and experimentally observed. Copyright © 2012 John Wiley & Sons, Ltd.