Electret transducer for vibration-based energy harvesting

Vibration-based electret energy harvesters with soft cellular spacer rings are presented. These harvesters are closely related to recently introduced electret accelerometers; however, their development targets are partially differing. Various harvesters with seismic masses from 8 to 23 g and surface...

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Bibliographic Details
Published in:Applied physics letters 2015-05, Vol.106 (18)
Main Authors: Hillenbrand, J., Pondrom, P., Sessler, G. M.
Format: Article
Language:English
Subjects:
ACCELERATION
Accelerometers
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
ELECTRETS
Energy harvesting
Frequency response
Harvesters
KHZ RANGE
Load resistance
MASS
Mathematical models
SPACERS
SURFACE POTENTIAL
TRANSDUCERS
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Summary:Vibration-based electret energy harvesters with soft cellular spacer rings are presented. These harvesters are closely related to recently introduced electret accelerometers; however, their development targets are partially differing. Various harvesters with seismic masses from 8 to 23 g and surface potentials in the 500 V regime were built and characterized and powers of up to 8 μW at about 2 kHz and an acceleration of 1 g were measured. An analytical model is presented which, for instance, allows the calculation of the frequency response of the power output into a given load resistance. Finally, experimental and calculated results are compared.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4919875