Analysis of Improving the Power out of a Piezoelectric Energy Harvester Using Segmented Electrodes
Journal Title: Mehran University Research Journal of Engineering and Technology - Year 2017, Vol 36, Issue 1
Abstract
Vibration-based EH (Energy Harvesting) using piezoelectric materials have been investigated by several research groups with the aim of harvesting maximum energy and providing power to low-powered wireless electronic systems for their entire operational life. The main areas of research includes improvements in mathematical modelling, optimization of harvester geometry, developments in electrical circuitry, advancements in charge storage devices and investigating various piezoelectric materials to achieve maximum power output. This paper investigates and compares the electrical power output with whole length electrodes and with segmentation of electrodes for the same harvester length. It is found that the voltage generated by one electrode of length l/2 of the direction-fixed tip system is significantly greater than that produced by one electrode of length l of the free tip system. This paper also verifies the fact that segmentation of electrodes reduces the effect of strain nodes and charge cancellation particularly at higher mode frequencies. The paper presents the simulation results using DSM (Dynamic Stiffness Matrix) which is a compact method of modelling piezoelectric beams
Authors and Affiliations
Sajid Rafique, Sadiq Shah
Keywords
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- EP ID EP196543
- DOI 10.22581/muet1982.1701.17
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