Output power and efficiency of electromagnetic energy harvesting systems with constrained range of motion
Output power and efficiency of electromagnetic energy harvesting systems with constrained range of motion
In some energy harvesting systems, the maximum displacement of the seismic mass is limited due to the physical constraints of the device. This is especially the case where energy is harvested from a vibration source with large oscillation amplitude (e.g., marine environment).
For the design of inertial systems, the maximum permissible displacement of the mass is a limiting condition. In this paper the maximum output power and the corresponding efficiency of linear and rotational electromagnetic energy harvesting systems with a constrained range of motion are investigated. A unified form of output power and efficiency is presented to compare the performance of constrained linear and rotational systems. It is found that rotational energy harvesting systems have a greater capability in transferring energy to the load resistance than linear directly coupled systems, due to the presence of an extra design variable, namely the ball screw lead. Also, in this paper it is shown that for a defined environmental condition and a given proof mass with constrained throw, the amount of power delivered to the electrical load by a rotational system can be higher than the amount delivered
by a linear system. The criterion that guarantees this favourable design has been obtained.
125009-[10pp]
Hendijanizadeh, M.
9631d6d8-f4fb-4088-8d66-950699eba189
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Moshrefi-Torbati, M.
65b351dc-7c2e-4a9a-83a4-df797973913b
2 November 2013
Hendijanizadeh, M.
9631d6d8-f4fb-4088-8d66-950699eba189
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Moshrefi-Torbati, M.
65b351dc-7c2e-4a9a-83a4-df797973913b
Hendijanizadeh, M., Sharkh, S.M., Elliott, S.J. and Moshrefi-Torbati, M.
(2013)
Output power and efficiency of electromagnetic energy harvesting systems with constrained range of motion.
Smart Materials and Structures, 22 (12), .
(doi:10.1088/0964-1726/22/12/125009).
Abstract
In some energy harvesting systems, the maximum displacement of the seismic mass is limited due to the physical constraints of the device. This is especially the case where energy is harvested from a vibration source with large oscillation amplitude (e.g., marine environment).
For the design of inertial systems, the maximum permissible displacement of the mass is a limiting condition. In this paper the maximum output power and the corresponding efficiency of linear and rotational electromagnetic energy harvesting systems with a constrained range of motion are investigated. A unified form of output power and efficiency is presented to compare the performance of constrained linear and rotational systems. It is found that rotational energy harvesting systems have a greater capability in transferring energy to the load resistance than linear directly coupled systems, due to the presence of an extra design variable, namely the ball screw lead. Also, in this paper it is shown that for a defined environmental condition and a given proof mass with constrained throw, the amount of power delivered to the electrical load by a rotational system can be higher than the amount delivered
by a linear system. The criterion that guarantees this favourable design has been obtained.
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Accepted/In Press date: July 2013
Published date: 2 November 2013
Organisations:
Mechatronics
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Local EPrints ID: 359589
URI: http://eprints.soton.ac.uk/id/eprint/359589
PURE UUID: a59542d2-549a-45e6-9b4b-f4fcaf8134a5
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Date deposited: 07 Nov 2013 15:08
Last modified: 15 Mar 2024 02:48
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