Ultra-wide bandwidth piezoelectric energy harvesting

Ultra-wide bandwidth piezoelectric energy harvesting

Author: Hajati, Arman; Kim, Sang-Gook

Citable URI: http://hdl.handle.net/1721.1/75264

Department: Massachusetts Institute of Technology. Dept. of Mechanical Engineering; Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science

Publisher: American Institute of Physics

Date Issued: 2011-08

Abstract:

Here, we present an ultra wide-bandwidth energy harvester by exploiting the nonlinear stiffness of a doubly clamped microelectromechanical systems (MEMSs) resonator. The stretching strain in a doubly clamped beam shows a nonlinear stiffness, which provides a passive feedback and results in amplitude-stiffened Duffing mode resonance. This design has been fabricated into a compact MEMS device, which is about the size of a US quarter coin. Based on the open circuit voltage measurement, it is expected to have more than one order of magnitude improvement in both bandwidth (more than 20% of the peak frequency) and power density (up to 2 W/cm3) in comparison to the devices previously reported.

URI: http://hdl.handle.net/1721.1/75264

ISSN: 0003-6951
1077-3118

Version: Final published version

Terms of Use: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Published As: http://dx.doi.org/10.1063/1.3629551

Journal: Applied Physics Letters

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