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Dynamic switching conversion for piezoelectric energy harvesting systems

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7 Author(s)
Aldo Romani ; ARCES-LYRAS, II School of Engineering, University of Bologna, Forlì, Italy ; Cinzia Tamburini ; Alessandro Golfarelli ; Rossano Codeluppi
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The current advances in ultra-low power design let foresee great opportunities in energy harvesting platforms for self-powered systems. This paper presents a switching conversion scheme based on active control for harvesting energy with a higher efficiency than traditional approaches. The approach has been validated for piezoelectric energy harvesters with mixed-signal circuital simulations of non-linear equivalent electromechanical systems and a prototype has been developed. The proposed switching converter may increase harvested power of about 30% with respect to solutions based on traditional rectifiers and is expected to achieve up to 755 muW in a train passenger car running at about 100 km/h with a 32 times 6 mm2 cantilever with a 35 g mass attached at the free end.

Published in:

Sensors, 2008 IEEE

Date of Conference:

26-29 Oct. 2008