Low Frequency Vibration-Based Mems Piezoelectric Energy Harvester
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Date
2014-07
Authors
Saadon, Salem Abdullah Amer
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Providing a green, virtually infinite alternative power source to traditional energy sources
will significantly expand applications for WSNs and other technologies. The use of
piezoelectric materials to capitalize on the ambient vibrations surrounding a system is one
method that has seen a dramatic rise in the use for power harvesting. Most of the works
found in literature are different in their structures and vibration frequencies, and only few
of them have focused on power harvesting under both low frequency and acceleration
applications. In order to meet the requirements of power optimization, three analytical
models of different structural cantilevers (T-shaped, E-shaped, and arrayed harvester)
were developed, verified, and simulated through the methodology of this research
according to the flowchart developed. Finally, a proposed design of a 5-element
cantilever-based array MEMS piezoelectric energy harvester for low frequency is being
analytically modeled and simulated by COVENTORWARE approach. Throughout this
study, an ambient vibration-based MEMS piezoelectric energy harvester has been
modeled and designed for low frequency applications, the harvested power and voltage
were 1.8 μWatts and 190 mV respectively for a single cantilever element at excitation
frequency of 70.2 Hz, while the designed 5-element cantilever based energy harvester
extracted up to 6.8 μWatts and 0.4 volts at excitation frequency band of 67 to 70 Hz
under acceleration amplitude of 1.3g, yielding power density of 2.3 μWatts/mm3 of a
harvester volume 3 mm3
Description
Keywords
Low frequency vibration , energy harvester