Details
| Original language | English |
|---|---|
| Pages (from-to) | 38-56 |
| Number of pages | 19 |
| Journal | Integrated ferroelectrics |
| Volume | 192 |
| Issue number | 1 |
| Publication status | Published - 26 Feb 2019 |
Abstract
Piezoelectric energy harvesting from mechanical vibrations is a reliable technology to charge low power electronic equipment. It has been reported in the literature that low frequency broadband vibrations cannot be harvested effectively using linear piezoelectric energy harvester (PEH). In this paper a bistable nonlinear PEH with two distinct energy wells generated using repulsive magnetic interactions between a cantilever magnetic proof mass and an external magnet is considered. It has been modeled using finite element method and validated with experimental results. Experimental results verify that, for our study, distance between magnetic proof mass and external magnet of 1.32 T flux density should be less than or equal to 8.5 mm for maintaining bistability. This distance also affects to the resonance frequency of harvester. Maximum efficiency of the harvester has been noticed at 8.5mm. Further it has been shown experimentally that the bistable nonlinear piezoelectric energy harvester takes almost half of the time taken by its linear counterpart to charge a 20 mAh battery.
Keywords
- bistable, Energy harvesting, piezoelectric, vibration
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Engineering(all)
- Control and Systems Engineering
- Materials Science(all)
- Ceramics and Composites
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Integrated ferroelectrics, Vol. 192, No. 1, 26.02.2019, p. 38-56.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Numerical and experimental study of bistable piezoelectric energy harvester
AU - Shah, Vishrut
AU - Kumar, Rajeev
AU - Talha, Mohammad
AU - Twiefel, Jens
PY - 2019/2/26
Y1 - 2019/2/26
N2 - Piezoelectric energy harvesting from mechanical vibrations is a reliable technology to charge low power electronic equipment. It has been reported in the literature that low frequency broadband vibrations cannot be harvested effectively using linear piezoelectric energy harvester (PEH). In this paper a bistable nonlinear PEH with two distinct energy wells generated using repulsive magnetic interactions between a cantilever magnetic proof mass and an external magnet is considered. It has been modeled using finite element method and validated with experimental results. Experimental results verify that, for our study, distance between magnetic proof mass and external magnet of 1.32 T flux density should be less than or equal to 8.5 mm for maintaining bistability. This distance also affects to the resonance frequency of harvester. Maximum efficiency of the harvester has been noticed at 8.5mm. Further it has been shown experimentally that the bistable nonlinear piezoelectric energy harvester takes almost half of the time taken by its linear counterpart to charge a 20 mAh battery.
AB - Piezoelectric energy harvesting from mechanical vibrations is a reliable technology to charge low power electronic equipment. It has been reported in the literature that low frequency broadband vibrations cannot be harvested effectively using linear piezoelectric energy harvester (PEH). In this paper a bistable nonlinear PEH with two distinct energy wells generated using repulsive magnetic interactions between a cantilever magnetic proof mass and an external magnet is considered. It has been modeled using finite element method and validated with experimental results. Experimental results verify that, for our study, distance between magnetic proof mass and external magnet of 1.32 T flux density should be less than or equal to 8.5 mm for maintaining bistability. This distance also affects to the resonance frequency of harvester. Maximum efficiency of the harvester has been noticed at 8.5mm. Further it has been shown experimentally that the bistable nonlinear piezoelectric energy harvester takes almost half of the time taken by its linear counterpart to charge a 20 mAh battery.
KW - bistable
KW - Energy harvesting
KW - piezoelectric
KW - vibration
UR - http://www.scopus.com/inward/record.url?scp=85062100667&partnerID=8YFLogxK
U2 - 10.1080/10584587.2018.1521669
DO - 10.1080/10584587.2018.1521669
M3 - Article
AN - SCOPUS:85062100667
VL - 192
SP - 38
EP - 56
JO - Integrated ferroelectrics
JF - Integrated ferroelectrics
SN - 1058-4587
IS - 1
ER -