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A high figure of merit vibrational energy harvester for low frequency applications

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dc.contributor.author Nico, Valeria
dc.contributor.author Boco, Elisabetta
dc.contributor.author Frizzell, Ronan
dc.contributor.author Punch, Jeff
dc.date.accessioned 2017-12-08T12:35:05Z
dc.date.available 2017-12-08T12:35:05Z
dc.date.issued 2016
dc.identifier.uri http://hdl.handle.net/10344/6333
dc.description peer-reviewed en_US
dc.description.abstract Small-scale vibration energy harvesters that respond efficiently at low frequencies are challenging to realize. This paper describes the design and implementation of one such harvester, which achieves a high volumetric Figure of Merit (FoM(v) = 2.6% at 11.50Hz) at the scale of a C-type battery and outperforms other state-of-the-art devices in the sub 20 Hz frequency range. The device employs a 2 Degree-of-Freedom velocity-amplified approach and electromagnetic transduction. The harvester comprises two masses oscillating one inside the other, between four sets of magnetic springs. Collisions between the two masses transfer momentum from the heavier to the lighter mass, exploiting velocity amplification. The paper first presents guidelines for designing and optimizing the transduction mechanism, before a nonlinear numerical model for the system dynamics is developed. Experimental characterisation of the harvester design is then presented to validate both the transducer optimization and the dynamics model. The resulting high FoM(V) demonstrates the effectiveness of the device for low frequency applications, such as human motion. (C) 2016 AIP Publishing LLC. en_US
dc.language.iso eng en_US
dc.publisher AIP Publishing en_US
dc.relation.ispartofseries Applied Physics Letters;108:013902
dc.rights Copyright 2016 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics en_US
dc.subject electromagnetic generator en_US
dc.subject design en_US
dc.subject amplification en_US
dc.subject device en_US
dc.title A high figure of merit vibrational energy harvester for low frequency applications en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2017-12-08T12:28:45Z
dc.description.version PUBLISHED
dc.identifier.doi 10.1063/1.4939545
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor IDA en_US
dc.relation.projectid 10/CE/I1853 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1639690
dc.internal.copyrightchecked Yes
dc.identifier.journaltitle Applied Physics Letters
dc.description.status peer-reviewed


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