Kankanamalage, R.R., Foster, M.P. orcid.org/0000-0002-8565-0541 and Davidson, J.N. (2019) Online electrolytic capacitor prognosis system for PWM drives. In: 2019 European Conference on Power Electronics and Applications (EPE'19 ECCE-Europe). 2019 European Conference on Power Electronics and Applications (EPE'19 ECCE-Europe), 02-06 Sep 2019, Genova, Italy. Institute of Electrical and Electronics Engineers (IEEE) ISBN 9789075815306
Abstract
Electrolytic capacitors are ubiquitous in power electronic systems owing to their relatively large capacitance-to-volume ratio provided by virtue of their anodised electrode and electrolyte. As the capacitor ages, the electrolyte solution present in the capacitor is known to reduce and this leads to an increase in the equivalent series resistance (ESR) and a reduction in the capacitance. End-of-life for electrolytic capacitors is indicated by an increase in ESR by a factor of two. Here a prognostic system is proposed that can measure the ESR of a capacitor while it is operating in a PWM circuit. By using lock-in amplifiers synchronised to the PWM fundamental frequency, it is possible to extract precisely capacitor ripple voltage and ripple current. These signals are then combined to provide an estimate for the ESR.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 European Power Electronics and Drives Association & the Institute of Electrical and Electronics Engineers (IEEE). |
Keywords: | Capacitance measurements; Switching converters; Pulse-width modulation; Prognostics and health management |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 Oct 2019 13:26 |
Last Modified: | 25 Oct 2019 13:35 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Refereed: | Yes |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:151527 |