Dynamic switching conversion for piezoelectric energy harvesting systems

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 h...

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Bibliographic Details
Main Authors: Romani, A., Tamburini, C., Golfarelli, A., Codeluppi, R., Sangiorgi, E., Tartagni, M., Paganelli, R.P.
Format: Conference Proceeding
Language:English
Subjects:
Bridge circuits
Circuit simulation
Diodes
Rectifiers
Switches
Switching circuits
Switching converters
Threshold voltage
Vibrations
Wireless sensor networks
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Summary: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 mm 2 cantilever with a 35 g mass attached at the free end.
ISSN:1930-0395
2168-9229
DOI:10.1109/ICSENS.2008.4716535