TY - JOUR
T1 - Modeling and design of Galfenol unimorph energy harvesters
AU - Deng, Zhangxian
AU - Dapino, Marcelo J.
N1 - Publisher Copyright:
© 2015 IOP Publishing Ltd Printed in the UK.
PY - 2015/11/5
Y1 - 2015/11/5
N2 - This article investigates the modeling and design of vibration energy harvesters that utilize irongallium (Galfenol) as a magnetoelastic transducer. Galfenol unimorphs are of particular interest; however, advanced models and design tools are lacking for these devices. Experimental measurements are presented for various unimorph beam geometries. A maximum average power density of 24.4mW cm-3 and peak power density of 63.6mW cm-3 are observed. A modeling framework with fully coupled magnetoelastic dynamics, formulated as a 2D finite element model, and lumped-parameter electrical dynamics is presented and validated. A comprehensive parametric study considering pickup coil dimensions, beam thickness ratio, tip mass, bias magnet location, and remanent flux density (supplied by bias magnets) is developed for a 200 Hz, 9.8m s-2 amplitude harmonic base excitation. For the set of optimal parameters, the maximum average power density and peak power density computed by the model are 28.1 and 97.6mW cm-3, respectively.
AB - This article investigates the modeling and design of vibration energy harvesters that utilize irongallium (Galfenol) as a magnetoelastic transducer. Galfenol unimorphs are of particular interest; however, advanced models and design tools are lacking for these devices. Experimental measurements are presented for various unimorph beam geometries. A maximum average power density of 24.4mW cm-3 and peak power density of 63.6mW cm-3 are observed. A modeling framework with fully coupled magnetoelastic dynamics, formulated as a 2D finite element model, and lumped-parameter electrical dynamics is presented and validated. A comprehensive parametric study considering pickup coil dimensions, beam thickness ratio, tip mass, bias magnet location, and remanent flux density (supplied by bias magnets) is developed for a 200 Hz, 9.8m s-2 amplitude harmonic base excitation. For the set of optimal parameters, the maximum average power density and peak power density computed by the model are 28.1 and 97.6mW cm-3, respectively.
KW - energy harvesting
KW - Galfenol
KW - unimorph
UR - http://www.scopus.com/inward/record.url?scp=84948784184&partnerID=8YFLogxK
U2 - 10.1088/0964-1726/24/12/125019
DO - 10.1088/0964-1726/24/12/125019
M3 - Article
AN - SCOPUS:84948784184
SN - 0964-1726
VL - 24
JO - Smart Materials and Structures
JF - Smart Materials and Structures
IS - 12
M1 - 125019
ER -