Abstract and References
Transactions on Science and Technology Vol. 4, No. 3, 252 - 261, 2017

Three Elemental Regenerated Cellulose Piezoelectric Energy Harvester

Jongbeom Im, Seung-Ki Min, Hyun Chan Kim, Jaehwan Kim, Jedol Dayou

ABSTRACT
 Harvesting ambient vibration energy using piezoelectric cantilever beam or piezobeam was found to increase substantially by splitting a given piezobeam into several pieces with equal width, and then combined them in parallel connection. This increase was reported as mainly contributed from the reduction of the piezobeam damping when the width was reduced and therefore increasing the displacement amplitude to produce higher harvesting power compared to single beam with the same total width. The finding is further investigated in this paper by considering load resistance and impedance matching in conjunction with using up to three elements of regenerated cellulose piezobeams. Two connection modes were examined, parallel and series, in terms of their harvesting capability at resonance frequency. It was found that series connection generates even higher power output than parallel connection in both two and three piezobeam elements. It is further revealed that series connection has more allowance in impedance matching than parallel connection, which offers additional flexibility when fabricating piezoelectric-based energy harvester.

KEYWORDS: Cellulose EAPap; Piezoelectric energy harvester; Structural damping; Energy conversion; Width-splitting method
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