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Design and experimental characterization of a tunable vibration-based electromagnetic micro-generator

Design and experimental characterization of a tunable vibration-based electromagnetic micro-generator
Design and experimental characterization of a tunable vibration-based electromagnetic micro-generator
Vibration-based micro-generators, as an alternative source of energy, have become increasingly significant in the last decade. This paper presents a new tunable electromagnetic vibration-based micro-generator. Frequency tuning is realized by applying an axial tensile force to the micro-generator. The dimensions of the generator, especially the dimensions of the coil and the air gap between magnets, have been optimized to maximize the output voltage and power of the micro-generator. The resonant frequency has been successfully tuned from 67.6 to 98 Hz when various axial tensile forces were applied to the structure. The generator produced a power of 61.6–156.6uW over the tuning range when excited at vibrations of 0.59ms^?2. The tuning mechanism has little effect on the total damping. When the tuning force applied on the generator becomes larger than the generator’s inertial force, the total damping increases resulting in reduced output power. The resonant frequency increases less than indicated from simulation and approaches that of a straight tensioned cable when the force associated with the tension in the beam becomes much greater than the beam stiffness. The test results agree with the theoretical analysis presented.
0924-4247
284-293
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Roberts, Stephen
fef5d01c-92bd-44cf-93f0-923ec24f8875
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Roberts, Stephen
fef5d01c-92bd-44cf-93f0-923ec24f8875
Tudor, John
46eea408-2246-4aa0-8b44-86169ed601ff
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Zhu, Dibin, Roberts, Stephen, Tudor, John and Beeby, Steve (2010) Design and experimental characterization of a tunable vibration-based electromagnetic micro-generator Sensors and Actuators A: Physical, 158, (2), pp. 284-293.

Record type: Article

Abstract

Vibration-based micro-generators, as an alternative source of energy, have become increasingly significant in the last decade. This paper presents a new tunable electromagnetic vibration-based micro-generator. Frequency tuning is realized by applying an axial tensile force to the micro-generator. The dimensions of the generator, especially the dimensions of the coil and the air gap between magnets, have been optimized to maximize the output voltage and power of the micro-generator. The resonant frequency has been successfully tuned from 67.6 to 98 Hz when various axial tensile forces were applied to the structure. The generator produced a power of 61.6–156.6uW over the tuning range when excited at vibrations of 0.59ms^?2. The tuning mechanism has little effect on the total damping. When the tuning force applied on the generator becomes larger than the generator’s inertial force, the total damping increases resulting in reduced output power. The resonant frequency increases less than indicated from simulation and approaches that of a straight tensioned cable when the force associated with the tension in the beam becomes much greater than the beam stiffness. The test results agree with the theoretical analysis presented.

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Published date: March 2010
Organisations: EEE

Identifiers

Local EPrints ID: 268485
URI: http://eprints.soton.ac.uk/id/eprint/268485
ISSN: 0924-4247
PURE UUID: e9154797-d30c-41c3-8435-9253015bd89f
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

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Date deposited: 09 Feb 2010 15:09
Last modified: 03 Nov 2017 20:51

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Contributors

Author: Dibin Zhu
Author: Stephen Roberts
Author: John Tudor
Author: Steve Beeby ORCID iD

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