Co-optimization of a piezoelectric energy harvesting system for broadband operation
Name
Zhao_2019_J._Phys.__Conf._Ser._1407_012010.pdf
Description
Published version
Size
1.66 MB
Format
Adobe PDF
Checksum (MD5)
dbb121c2d64f4002b8f224eb5c753a56
Author(s)
Radhakrishna, Ujwal
Lang, J. H.
Date Issued
November 2019
Journal
Journal of Physics: Conference Series
Publisher
IOP Publishing
Citation
Zhao. S. et al. “Co-optimization of a piezoelectric energy harvesting system for broadband operation,” Journal of Physics: Conference Series, vol. 1407, 2019, 012010 © 2019 The Author(s)
Version
Final published version
Abstract
The goal of this research is to increase the bandwidth (BW) over which substantial energy can be harvested using a piezoelectric energy harvester (PEH). The key innovation is the use of bias-flip (BF) electronics at the output of a PEH having a large electromechanical coupling coefficient κe2. For a PEH with large κe2, the open-circuit resonance frequency f oc is substantially larger than the short-circuit resonance frequency f sc. Over the intervening range, the reactive part of the conjugate matched load impedance is small, and can be approximated using BF electronics in which the BF voltage is sufficiently small and the BF losses are small. This results in a large BW over which substantial energy can be harvested. Experimental results using a commercially available PEH are presented to demonstrate this concept. Design guidelines are provided for achieving PEHs having increased κe2.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1742-6596/1407/1/012010
