Increasing the Output from Piezoelectric Energy Harvester Using Width-Split Method with Verification

Chow , Man Sang and Jedol Dayou, and Willey Y. H. Liew, (2013) Increasing the Output from Piezoelectric Energy Harvester Using Width-Split Method with Verification. International Journal of Precision Engineering and Manufacturing, 14 (12). pp. 2149-2155. ISSN 2005-4602

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Abstract

This paper proposes a new scheme for piezoelectric energy harvesting maximization. The proposed enhancement relies on a new topology of splitting a specified dimension piezo composite bender into beams with smaller width and, therefore, higher quality factor (or Q factor). The increase of Q factor allows a much more effective energy conversion process. It is shown that the proposed method, based on single splitting, increases the harvested power by a factor of up to √6, and up to √7.62 for two even-splitting compared to with no splitting. The wideband operation is accomplished by using different resonating benders in such a way that individual benders are each tuned to a different resonance frequency. Taking the configuration of single even-splitting as an example, the power output of the prototype was 39 μW at 27.2 Hz with 8 Hz bandwidth under 2 mm peak-to-peak input displacement and 3 Hz variation in resonant frequency. This corresponds to more than 2 times of power output with no splitting as well as about 23% increase in bandwidth. Such power output is sufficient to power up electronics devices such as a “2 AA dry cells-powered” digital clock with the wider range operating frequency.

Item Type:Article
Uncontrolled Keywords:Piezoelectric energy harvester, Ambient vibration, Wideband operation, Quality factor, Structural damping, Energy conversion
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:8035
Deposited By:IR Admin
Deposited On:01 Apr 2014 15:19
Last Modified:17 Feb 2015 13:07

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