Modelling and experimental characterization of an energy harvester with bi-stable compliance characteristics
Modelling and experimental characterization of an energy harvester with bi-stable compliance characteristics
This paper presents a novel design for a vibrational energy harvester. The design uses high permeability magnetic materials which brings about two key advantages. First, it gives strong coupling between the mechanical and electrical domains, thus enabling effective energy conversion. Second, it gives the device a bi-stable compliance characteristic, which gives the harvester a broad-band frequency response. An explicit analytical model is developed using a combination of experimental data and finite element modelling in order to accurately incorporate the magnetic forces. The model is then validated using dynamic tests of the experimental rig. The main features of the dynamic response of the bi-stable oscillator are highlighted and benefits discussed in the context of energy harvesting. Finally, comments are made on the relationship between the complicated behaviour resulting from the bi-stable compliance characteristic and the benefits of increased electrical coupling.
475-484
Cammarano, A.
c0c85f55-3dfc-4b97-9b79-e2554406a12b
Burrow, S.G.
76e1fbd4-91d4-443a-a0b1-bc7a4d88cd78
Barton, D.A.W.
3003bb1f-d648-4d00-a309-8ab75f333df0
June 2011
Cammarano, A.
c0c85f55-3dfc-4b97-9b79-e2554406a12b
Burrow, S.G.
76e1fbd4-91d4-443a-a0b1-bc7a4d88cd78
Barton, D.A.W.
3003bb1f-d648-4d00-a309-8ab75f333df0
Cammarano, A., Burrow, S.G. and Barton, D.A.W.
(2011)
Modelling and experimental characterization of an energy harvester with bi-stable compliance characteristics.
Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering, 225 (4), .
(doi:10.1177/0959651811403093).
Abstract
This paper presents a novel design for a vibrational energy harvester. The design uses high permeability magnetic materials which brings about two key advantages. First, it gives strong coupling between the mechanical and electrical domains, thus enabling effective energy conversion. Second, it gives the device a bi-stable compliance characteristic, which gives the harvester a broad-band frequency response. An explicit analytical model is developed using a combination of experimental data and finite element modelling in order to accurately incorporate the magnetic forces. The model is then validated using dynamic tests of the experimental rig. The main features of the dynamic response of the bi-stable oscillator are highlighted and benefits discussed in the context of energy harvesting. Finally, comments are made on the relationship between the complicated behaviour resulting from the bi-stable compliance characteristic and the benefits of increased electrical coupling.
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e-pub ahead of print date: 10 June 2011
Published date: June 2011
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Local EPrints ID: 490775
URI: http://eprints.soton.ac.uk/id/eprint/490775
PURE UUID: e95205fa-be62-484f-9425-008b87953a21
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Date deposited: 06 Jun 2024 16:40
Last modified: 12 Nov 2024 03:15
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Author:
A. Cammarano
Author:
S.G. Burrow
Author:
D.A.W. Barton
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