Energy harvesting from ambient sources is an interesting opportunity for wireless and self-powered electronics, increasing research efforts toward the development of new devices. Among all the energy sources, vibrations seem particularly convenient for this kind of application. Piezoelectric resonant systems, though offering configurations well suited to recovery energy from vibrations, suffer from narrow operational bands, and for this reason new solution to enhance performances at off-design excitation conditions are sought. In this paper a piezoelectric resonant energy harvester is developed, focusing the attention on both ceramics production method and support material choice in order to maximize the oscillation amplitudes, and consequently the energy production. The device produced at ISTEC laboratories is then compared with a commercial product under harmonic excitations. Results relative to power output show that the in-house assembled device has better performance than the commercial one in the considered tested conditions both in absolute terms and with respect to the active piezoelectric volume of the two devices.
Performance testing of a piezoelectric device for extracting energy from vibrations / Leonardi, Giorgia; Passacantilli, Fabio; Galassi, Carmen; Dessi, Daniele. - (2019). (Intervento presentato al convegno 13th international conference on modelling and simulation of electric machines, converters and systems, Electrimacs 2019 tenutosi a Salerno; Italy).
Performance testing of a piezoelectric device for extracting energy from vibrations
Giorgia Leonardi;Daniele Dessi
2019
Abstract
Energy harvesting from ambient sources is an interesting opportunity for wireless and self-powered electronics, increasing research efforts toward the development of new devices. Among all the energy sources, vibrations seem particularly convenient for this kind of application. Piezoelectric resonant systems, though offering configurations well suited to recovery energy from vibrations, suffer from narrow operational bands, and for this reason new solution to enhance performances at off-design excitation conditions are sought. In this paper a piezoelectric resonant energy harvester is developed, focusing the attention on both ceramics production method and support material choice in order to maximize the oscillation amplitudes, and consequently the energy production. The device produced at ISTEC laboratories is then compared with a commercial product under harmonic excitations. Results relative to power output show that the in-house assembled device has better performance than the commercial one in the considered tested conditions both in absolute terms and with respect to the active piezoelectric volume of the two devices.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.