The University of Southampton
University of Southampton Institutional Repository

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

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. (doi:10.1016/j.sna.2010.01.002).

Record type: Article


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.

PDF published.pdf - Other
Download (2MB)

More information

Published date: March 2010
Organisations: EEE


Local EPrints ID: 268485
ISSN: 0924-4247
PURE UUID: e9154797-d30c-41c3-8435-9253015bd89f
ORCID for Steve Beeby: ORCID iD

Catalogue record

Date deposited: 09 Feb 2010 15:09
Last modified: 18 Jul 2017 06:54

Export record



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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.