An Impedance Matching Solution to Increase the Harvested Power and Efficiency of Nonlinear Piezoelectric Energy Harvesters

Michele Bonnin, Fabio L. Traversa and Fabrizio Bonani
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Michele Bonnin: Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, 10129 Turin, Italy
Fabio L. Traversa: MemComputing Inc., San Diego, CA 92093-0319, USA
Fabrizio Bonani: Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, 10129 Turin, Italy

Energies, 2022, vol. 15, issue 8, 1-17

Abstract: Circuit theory and nonlinear dynamics are instrumental to design efficient energy harvesters for ambient mechanical vibrations. In this work, we show that an impedance matching networks can be designed that maximizes the harvested power, and improves the power efficiency. The proposed matching network achieves impedance matching at a single frequency, that can be chosen at will by the designer, and does not need to coincide with the resonant frequency of the harvester. Moreover, the matching network also increases the harvested power over a wide frequency bandwidth. According to our numerical simulations, the matching network increases the maximum harvested power by a factor greater than 3, and the power harvested over the whole frequency spectrum by a factor of 6. The frequency bandwidth can be further extended considering nonlinear energy harvesters. Even using the matching network designed for the linear case, performance is significantly nonetheless improved for the nonlinear harvester.

Keywords: energy harvesting; piezoelectric energy harvester; nonlinear dynamical systems; equivalent circuits; impedance matching; power efficiency; nonlinear resonance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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