eprintid: 5714
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/57/14
datestamp: 2023-11-09 16:17:27
lastmod: 2023-11-09 16:17:27
status_changed: 2023-11-09 16:03:40
type: article
metadata_visibility: show
creators_name: Ooi, B.L.
creators_name: Gilbert, J.M.
creators_name: Aziz, A.R.A.
title: Switching damping for a frequency-tunable electromagnetic energy harvester
ispublished: pub
keywords: Electromagnetic waves; Energy harvesting; Natural frequencies; Switching, Average output power; Electrical damping; Electromagnetic generators; Frequency-tuning; Operational bandwidth; Oscillating cycle; Oscillation cycles; Wideband energy, Damping
note: cited By 14
abstract: This paper demonstrates the possibility to widen the operational bandwidth of an electromagnetic energy harvester by switching the values of electrical damping coefficient at different points within the oscillating cycle. In this system, the damping in the system is electronically switched by adjusting the value of load resistance used. An analytical model of the switching damping device is presented in which it is shown that altering the damping can increase or decrease the duration of particular segment of the oscillation cycle and so, by selecting appropriate damping, the resonant frequency can be altered. The predictive results are then validated by series of experimental results for the proposed range of resistive load resistances. For the prototype considered, a frequency shift of +1 to -1.3 of the resonant frequency are achieved. However, this shifting of the resonant frequency does come with some loss of average output power, since this is highly susceptible to the electrical induced damping applied to the device. © 2015 Elsevier B.V. All rights reserved.
date: 2015
publisher: Elsevier
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942815178&doi=10.1016%2fj.sna.2015.09.022&partnerID=40&md5=1510ac9f2e57605a5f2157a8d36b118d
id_number: 10.1016/j.sna.2015.09.022
full_text_status: none
publication: Sensors and Actuators, A: Physical
volume: 234
pagerange: 311-320
refereed: TRUE
issn: 09244247
citation:   Ooi, B.L. and Gilbert, J.M. and Aziz, A.R.A.  (2015) Switching damping for a frequency-tunable electromagnetic energy harvester.  Sensors and Actuators, A: Physical, 234.  pp. 311-320.  ISSN 09244247