Switching damping for a frequency-tunable electromagnetic energy harvester

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 adjust...

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Main Authors: Ooi, B.L., Gilbert, J.M., Aziz, A.R.A.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.31622 /
Published: Elsevier 2015
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942815178&doi=10.1016%2fj.sna.2015.09.022&partnerID=40&md5=1510ac9f2e57605a5f2157a8d36b118d
http://eprints.utp.edu.my/31622/
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spelling utp-eprints.316222022-03-26T03:24:19Z Switching damping for a frequency-tunable electromagnetic energy harvester Ooi, B.L. Gilbert, J.M. Aziz, A.R.A. 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. Elsevier 2015 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942815178&doi=10.1016%2fj.sna.2015.09.022&partnerID=40&md5=1510ac9f2e57605a5f2157a8d36b118d 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. http://eprints.utp.edu.my/31622/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description 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.
format Article
author Ooi, B.L.
Gilbert, J.M.
Aziz, A.R.A.
spellingShingle Ooi, B.L.
Gilbert, J.M.
Aziz, A.R.A.
Switching damping for a frequency-tunable electromagnetic energy harvester
author_sort Ooi, B.L.
title Switching damping for a frequency-tunable electromagnetic energy harvester
title_short Switching damping for a frequency-tunable electromagnetic energy harvester
title_full Switching damping for a frequency-tunable electromagnetic energy harvester
title_fullStr Switching damping for a frequency-tunable electromagnetic energy harvester
title_full_unstemmed Switching damping for a frequency-tunable electromagnetic energy harvester
title_sort switching damping for a frequency-tunable electromagnetic energy harvester
publisher Elsevier
publishDate 2015
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
http://eprints.utp.edu.my/31622/
_version_ 1741197607565262848
score 11.62408

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