15 April 2016 Power conditioning for low-voltage piezoelectric stack energy harvesters
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Abstract
Low-power vibration and acoustic energy harvesting scenarios typically require a storage component to be charged to enable wireless sensor networks, which necessitates power conditioning of the AC output. Piezoelectric beam-type bending mode energy harvesters or other devices that operate using a piezoelectric element at resonance produce high voltage levels, for which AC-DC converters and step-down DC-DC converters have been previously investigated. However, for piezoelectric stack energy harvesters operating off-resonance and producing low voltage outputs, a step-up circuit is required for power conditioning, such as seen in electromagnetic vibration energy scavengers, RF communications, and MEMS harvesters. This paper theoretically and experimentally investigates power conditioning of a low-voltage piezoelectric stack energy harvester.
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E. Skow, E. Skow, S. Leadenham, S. Leadenham, K. A. Cunefare, K. A. Cunefare, A. Erturk, A. Erturk, "Power conditioning for low-voltage piezoelectric stack energy harvesters", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97990P (15 April 2016); doi: 10.1117/12.2219211; https://doi.org/10.1117/12.2219211
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