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Vibration Energy Harvester with Sustainable Power Based on a Single-Crystal Piezoelectric Cantilever Array
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- Authors
- Moonkeun kim, Sang-kyun Lee, Yong-Hyun Ham, Yil Suk Yang, Jong-Kee Kwon, Kwang-Ho Kwon
- Issue Date
- 2012-08
- Citation
- Journal of Nanoscience and Nanotechnology, v.12, no.8, pp.6283-6286
- ISSN
- 1533-4880
- Publisher
- American Scientific Publishers (ASP),
- Language
- English
- Type
- Journal Article
- Abstract
- We designed and fabricated a bimorph cantilever array for sustainable power with an integrated Cu proof mass to obtain additional power and current. We fabricated a cantilever system using singlecrystal piezoelectric material and compared the calculations for single and arrayed cantilevers to those obtained experimentally. The vibration energy harvester had resonant frequencies of 60.4 and 63.2 Hz for short and open circuits, respectively. The damping ratio and quality factor of the cantilever device were 0.012 and 41.66, respectively. The resonant frequency at maximum average power was 60.8 Hz. The current and highest average power of the harvester array were found to be 0.728 mA and 1.61 mW, respectively. The sustainable maximum power was obtained after slightly shifting the short-circuit frequency. In order to improve the current and power using an array of cantilevers, we also performed energy conversion experiments. Copyright © 2012 American Scientific Publishers.
- KSP Keywords
- Average Power, Bimorph cantilever, Damping ratio, Energy conversion, Piezoelectric cantilever, Piezoelectric material, Quality factor(VSWR and Q), Resonant Frequency, Single crystal, Sustainable power, Vibration energy harvester