Vibrational energy harvesting by means of piezoelectric transducers has been of particular interest in recent years for powering autonomous, wireless devices. In this context, a non-linear treatment of piezoelectric voltage greatly enhances electromechanical conversion. This paper presents an ultra-low power circuit implementation of the technique called Synchronized Switch Harvesting on Inductor (SSHI). The circuit detects the zero-current condition through the rectifier with a series shunt resistor and a nano-power comparator. Simulations show that the maximum power extracted is approximately 6.7 times greater than with a passive rectifier. The estimated overall consumption of the circuit components is 4 µA. The measured voltage flip efficiency is between 91% and 94%.

Actively Controlled Synchronized-Switch Harvesting on Inductor for Piezoelectric Transducers / Laura Landi, Cinzia Tamburini, Aldo Romani. - STAMPA. - (2023), pp. 118-123. [10.1007/978-3-031-25706-3]

Actively Controlled Synchronized-Switch Harvesting on Inductor for Piezoelectric Transducers

Laura Landi;Cinzia Tamburini;Aldo Romani
2023

Abstract

Vibrational energy harvesting by means of piezoelectric transducers has been of particular interest in recent years for powering autonomous, wireless devices. In this context, a non-linear treatment of piezoelectric voltage greatly enhances electromechanical conversion. This paper presents an ultra-low power circuit implementation of the technique called Synchronized Switch Harvesting on Inductor (SSHI). The circuit detects the zero-current condition through the rectifier with a series shunt resistor and a nano-power comparator. Simulations show that the maximum power extracted is approximately 6.7 times greater than with a passive rectifier. The estimated overall consumption of the circuit components is 4 µA. The measured voltage flip efficiency is between 91% and 94%.
2023
Sensors and Microsystems - Proceedings of AISEM 2022
118
123
Actively Controlled Synchronized-Switch Harvesting on Inductor for Piezoelectric Transducers / Laura Landi, Cinzia Tamburini, Aldo Romani. - STAMPA. - (2023), pp. 118-123. [10.1007/978-3-031-25706-3]
Laura Landi, Cinzia Tamburini, Aldo Romani
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/914504
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