Maximizing Output Power in a Cantilevered Piezoelectric Vibration Energy Harvester by Electrode Design

Abstract

A resonant vibration energy harvester typically comprises of a clamped anchor and a vibrating shuttle with a proof mass. Piezoelectric materials are embedded in locations of high strain in order to transduce mechanical deformation into electric charge. Conventional design for piezoelectric vibration energy harvesters (PVEH) usually utilizes piezoelectric material and metal electrode layers covering the entire surface area of the cantilever with no consideration provided to examining the trade-off involved with respect to maximizing output power. This paper reports on the theory and experimental verification underpinning optimization of the active electrode area of a cantilevered PVEH in order to maximize output power. The analytical formulation utilizes Euler-Bernoulli beam theory to model the mechanical response of the cantilever. The expression for output power is reduced to a fifth order polynomial expression as a function of the electrode area. The maximum output power corresponds to the case when 44% area of the cantilever is covered by electrode metal. Experimental results are also provided to verify the theory.

Publication DOI: https://doi.org/10.1088/1742-6596/660/1/012114
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences
Additional Information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Publication ISSN: 1742-6596
Last Modified: 20 May 2024 07:28
Date Deposited: 13 Nov 2019 11:30
Full Text Link:
Related URLs: https://iopscie ... 96/660/1/012114 (Publisher URL)
PURE Output Type: Conference article
Published Date: 2015-12-01
Authors: Du, Sijun
Jia, Yu (ORCID Profile 0000-0001-9640-1666)
Seshia, Ashwin A

Download

[img]

Version: Published Version

License: Creative Commons Attribution


Export / Share Citation


Statistics

Additional statistics for this record