On the manipulation of the magnetic forces for improving the contactless plucking in piezoelectric vibration energy harvesters

On the manipulation of the magnetic forces for improving the contactless plucking in piezoelectric vibration energy harvesters

Michele Rosso, Filippo Pietro Perli, Alberto Corigliano, Raffaele Ardito

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Abstract. We propose a shielding technique for the magnetic field localization around permanent magnets (PMs) for sharpening the magnetic force-displacement curve in the frequency up-conversion (FuC) of piezoelectric vibration energy harvesters (PVEHs). We present a concept with theoretical formulation, computational analyses, and experimental validation that confirms the supposed principle. The numerical study on a PVEH shows that with the shielding, for varying actuation velocity, high values of peak power (50 mW – 150 mW) can be reached at low speeds (e.g. 0.5 m/s – 2.6 m/s). The unshielded device exhibits a good behavior for velocities over 3 m/s. This result makes the technique useful for the design of FuC mechanisms depending to its operating velocity.

Keywords
Piezoelectric Vibration Energy Harvesting, Magnetic Plucking, Nonlinear Dynamics, Advanced Frequency Up-Conversion

Published online 3/17/2022, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Michele Rosso, Filippo Pietro Perli, Alberto Corigliano, Raffaele Ardito, On the manipulation of the magnetic forces for improving the contactless plucking in piezoelectric vibration energy harvesters, Materials Research Proceedings, Vol. 26, pp 685-690, 2023

DOI: https://doi.org/10.21741/9781644902431-110

The article was published as article 110 of the book Theoretical and Applied Mechanics

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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