A new technique for piezoelectric energy harvesting derived from synchronous electric charge extraction (SECE) is introduced. The proposed quasi-synchronous electric charge extraction (QSECE) introduces a probability of activation and a random pulse-position modulation on each charge extraction cycle, in order to reduce undesired damping effects associated to SECE at resonance by spreading the spectrum of control signals outside the resonance region of the transducer. Experimental measurements show that QSECE extracts 29% more energy than SECE, while also decreasing switching power consumption.
Aldo Romani, Matteo Filippi (2014). Quasi-synchronous charge extraction for improved energy harvesting from highly coupled piezoelectric transducers. PROCEDIA ENGINEERING, 87, 1525-1528 [10.1016/j.proeng.2014.11.589].
Quasi-synchronous charge extraction for improved energy harvesting from highly coupled piezoelectric transducers
ROMANI, ALDO;FILIPPI, MATTEO
2014
Abstract
A new technique for piezoelectric energy harvesting derived from synchronous electric charge extraction (SECE) is introduced. The proposed quasi-synchronous electric charge extraction (QSECE) introduces a probability of activation and a random pulse-position modulation on each charge extraction cycle, in order to reduce undesired damping effects associated to SECE at resonance by spreading the spectrum of control signals outside the resonance region of the transducer. Experimental measurements show that QSECE extracts 29% more energy than SECE, while also decreasing switching power consumption.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
