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Article

Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations

School of Environment, Science and Engineering, Southern Cross University, East Lismore, NSW 2480, Australia
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Energies 2019, 12(14), 2770; https://doi.org/10.3390/en12142770
Received: 28 June 2019 / Revised: 17 July 2019 / Accepted: 17 July 2019 / Published: 19 July 2019
(This article belongs to the Special Issue Piezoelectric Materials)
Harvesting electricity from low frequency vibration sources such as human motions using piezoelectric energy harvesters (PEH) is attracting the attention of many researchers in recent years. The energy harvested can potentially power portable electronic devices as well as some medical devices without the need of an external power source. For this purpose, the piezoelectric patch is often mechanically attached to a cantilever beam, such that the resonance frequency is predominantly governed by the cantilever beam. To increase the power generated from vibration sources with varying frequency, a multiresonant PEH (MRPEH) is often used. In this study, an attempt is made to enhance the performance of MRPEH with the use of a cantilever beam of optimised shape, i.e., a cantilever beam with two triangular branches. The performance is further enhanced through optimising the design of the proposed MRPEH to suit the frequency range of the targeted vibration source. A series of parametric studies were first carried out using finite-element analysis to provide in-depth understanding of the effect of each design parameters on the power output at a low frequency vibration. Selected outcomes were then experimentally verified. An optimised design was finally proposed. The results demonstrate that, with the use of a properly designed MRPEH, broadband energy harvesting is achievable and the efficiency of the PEH system can be significantly increased. View Full-Text
Keywords: piezoelectric energy harvesting; renewable energy; low frequency; multiresonant piezoelectric energy harvesting; renewable energy; low frequency; multiresonant
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MDPI and ACS Style

Izadgoshasb, I.; Lim, Y.Y.; Vasquez Padilla, R.; Sedighi, M.; Novak, J.P. Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations. Energies 2019, 12, 2770. https://doi.org/10.3390/en12142770

AMA Style

Izadgoshasb I, Lim YY, Vasquez Padilla R, Sedighi M, Novak JP. Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations. Energies. 2019; 12(14):2770. https://doi.org/10.3390/en12142770

Chicago/Turabian Style

Izadgoshasb, Iman, Yee Y. Lim, Ricardo Vasquez Padilla, Mohammadreza Sedighi, and Jeremy P. Novak. 2019. "Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations" Energies 12, no. 14: 2770. https://doi.org/10.3390/en12142770

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