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Proceedings Paper

Finite element modeling of piezoelectric energy harvesters
Author(s): P. H. Wu; Y. C. Shu
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Paper Abstract

This article reports a novel finite element model of piezoelectric energy harvesters accounting for the effect of nonlinear interface circuits. The idea is to replace the energy harvesting circuit in parallel with the parasitic piezoelectric capacitance by an equivalent load impedance. This approach offers many advantages. First, the model itself can be implemented conveniently in commercial finite element softwares. Second, it directly provides system-level designs on the whole without resorting to circuit solvers. Third, the extensions to complicated structures such as array configurations are straightforward. The proposed finite element model is validated by considering the case of an array system endowed with the standard, parallel-/series-SSHI (synchronized switch harvesting on inductor) interfaces. Good agreement is found between simulation results and analytic estimates.

Paper Details

Date Published: 9 March 2014
PDF: 8 pages
Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90571D (9 March 2014); doi: 10.1117/12.2044347
Show Author Affiliations
P. H. Wu, National Taiwan Univ. (Taiwan)
Y. C. Shu, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 9057:
Active and Passive Smart Structures and Integrated Systems 2014
Wei-Hsin Liao, Editor(s)

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