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Ultra-wide bandwidth piezoelectric energy harvesting

Author(s)
Hajati, Arman; Kim, Sang-Gook
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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.
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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.
Date issued
2011-08
URI
http://hdl.handle.net/1721.1/75264
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Hajati, Arman, and Sang-Gook Kim. “Ultra-wide Bandwidth Piezoelectric Energy Harvesting.” Applied Physics Letters 99.8 (2011): 083105. Web. © 2011 American Institute of Physics.
Version: Final published version
ISSN
0003-6951
1077-3118

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