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Proceedings Paper

Improved nonlinear energy harvester with matched magnetic orientation
Author(s): W. Deng; Y. Wang
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Paper Abstract

In this paper, we report an improved novel nonlinear energy harvester with optimized magnetic force. The piezoelectric beam is subject to magnetic force between tip magnet and external ferroic plate. The shape curve of the ferroic plate is designed to optimize the magnetic force in order to make the proposed nonlinear energy harvester have large well distance but small well depth, which offers a high energy orbit and thus large-amplitude motion for the harvester under small excitation level. The magnetic force-deflection curve is obtained experimentally and the potential curve is calculated to verify the well distance and depth. The experiment results show that the excitation level to maintain the large-amplitude motion and perturbation level to trigger the large-amplitude motion increase with the potential well distance and the well depth. With the optimal distance and depth, the maximal output power and output bandwidth of the nonlinear energy harvester increase significantly. Our study gives important guidance for the design of nonlinear energy harvester with certain input excitation level.

Paper Details

Date Published: 15 April 2016
PDF: 11 pages
Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97992E (15 April 2016); doi: 10.1117/12.2219637
Show Author Affiliations
W. Deng, Stony Brook Univ. (United States)
Y. Wang, Stony Brook Univ. (United States)

Published in SPIE Proceedings Vol. 9799:
Active and Passive Smart Structures and Integrated Systems 2016
Gyuhae Park, Editor(s)

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