Design and analysis of cantilever based piezoelectric vibration energy harvester
ISSN: 0305-6120
Article publication date: 23 February 2018
Issue publication date: 19 April 2018
Abstract
Purpose
This paper aims to present the design of a cantilever beam with various kinds of geometries for application in energy harvesting devices with a view to enhance the harvested power. The cantilever beams in rectangular, triangular and trapezoidal geometries are simulated, designed and evaluated experimentally. A power conditioning circuit is designed and fabricated for rectification and regulation.
Design/methodology/approach
The analytical model based on Euler–Bernoulli beam theory is analyzed for various cantilever geometries. The aluminum beam with Lead Zirconate Titanate (PZT) 5H strip is used for performing frequency, displacement, strain distribution, stress and potential analysis. A comparative analysis is done based on the estimated performance of the cantilevers with different topologies of 4,500 mm3 volume.
Findings
The analysis shows the trapezoidal cantilever yielding a maximum voltage of 66.13 V at 30 Hz. It exhibits maximum power density of 171.29 W/mm3 at optimal resistive load of 330 kΩ. The generated power of 770.8 µW is used to power up a C-mote wireless sensor network.
Originality/value
This study provides a complete structural analysis and implementation of the cantilever for energy harvesting application, integration of power conditioning circuit with the energy harvester and evaluation of the designed cantilevers under various performance metrics.
Keywords
Citation
Savarimuthu, K., Sankararajan, R., M., G.N.A. and Roji M., A.M. (2018), "Design and analysis of cantilever based piezoelectric vibration energy harvester", Circuit World, Vol. 44 No. 2, pp. 78-86. https://doi.org/10.1108/CW-11-2017-0067
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited