Mr. Wei Deng Profile

Wei Deng

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Proceedings Article | 15 April 2016 Presentation + Paper

Improved nonlinear energy harvester with matched magnetic orientation

W. Deng, Y. Wang

Proceedings Volume 9799, 97992E (2016) https://doi.org/10.1117/12.2219637

KEYWORDS: Magnetism, Energy harvesting, Microsystems, Electromagnetism, Resistance, Numerical simulations, Distance measurement, Transducers, Aluminum, Mechanical engineering

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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.

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