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
10.08.2016
Patent
Elektronische Ressource
Englisch
Europäisches Patentamt | 2015
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