A device (100) harvests energy from vibration and/or strain and utilizes both capacitive (102a, 102b) and piezoelectric elements (105). The principle of operation is out-of-plane capacitive harvester, where the bias voltage for the capacitive element is generated with a piezoelectric element (105). The device utilizes a thin dielectric film (104) between the capacitor plates (102a, 102b) maximizing the harvested energy and enabling the harvester operation in semi-contact mode so that short circuits are prevented. For example when utilized in a wheel or the like, the capacitor is closed and opened at every strike or every turn of a wheel being thus independent of the harvester's mechanical resonance frequency.
METHOD AND DEVICE FOR ENERGY HARVESTING
VERFAHREN UND VORRICHTUNG ZUR STROMGEWINNUNG
PROCÉDÉ ET SYSTÈME DE RÉCUPÉRATION D'ÉNERGIE
2016-08-10
Patent
Electronic Resource
English
European Patent Office | 2015
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