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Conference Paper: A life prediction scheme for electrolytic capacitors in power converters without current sensor
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TitleA life prediction scheme for electrolytic capacitors in power converters without current sensor
 
AuthorsPang, HM1
Pong, BMH
 
KeywordsCapacitor voltages
Current mode control
Current ripples
Current sensing
Current sensors
 
Issue Date2010
 
PublisherIEEE.
 
CitationThe 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2010), Palm Springs, CA., 21-25 February 2010. In Proceedings of the 25th APEC, 2010, p. 973-979 [How to Cite?]
DOI: http://dx.doi.org/10.1109/APEC.2010.5433384
 
AbstractPredicting the expected life of switching power supply is essential since unexpected failure of the subsystem can produce enormous loss. Electrolytic capacitor is the weakest among various power components in a power converter. Monitoring the Equivalent Series Resistance (ESR) variation of the electrolytic capacitor, achieving by voltage and current ripple, can estimate the converter life. Currently, Hall Effect sensor or others are current sensing options but all of them add series impedance to the capacitor and deteriorate capacitor voltage waveform. A sensor-less current waveform prediction method is proposed. Popular current mode control with the switch current signal is used. Repetitive sampling on the switch current allows capacitors current waveforms prediction without any current sensor at capacitor nodes. Together with the voltage waveform acquired, the ESR value can be calculated. ©2010 IEEE.
 
ISSN1048-2334
 
DOIhttp://dx.doi.org/10.1109/APEC.2010.5433384
 
ISI Accession Number IDWOS:000278142300154
 
DC FieldValue
dc.contributor.authorPang, HM
 
dc.contributor.authorPong, BMH
 
dc.date.accessioned2010-12-23T08:40:41Z
 
dc.date.available2010-12-23T08:40:41Z
 
dc.date.issued2010
 
dc.description.abstractPredicting the expected life of switching power supply is essential since unexpected failure of the subsystem can produce enormous loss. Electrolytic capacitor is the weakest among various power components in a power converter. Monitoring the Equivalent Series Resistance (ESR) variation of the electrolytic capacitor, achieving by voltage and current ripple, can estimate the converter life. Currently, Hall Effect sensor or others are current sensing options but all of them add series impedance to the capacitor and deteriorate capacitor voltage waveform. A sensor-less current waveform prediction method is proposed. Popular current mode control with the switch current signal is used. Repetitive sampling on the switch current allows capacitors current waveforms prediction without any current sensor at capacitor nodes. Together with the voltage waveform acquired, the ESR value can be calculated. ©2010 IEEE.
 
dc.description.naturepublished_or_final_version
 
dc.description.otherThe 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2010), Palm Springs, CA., 21-25 February 2010. In Proceedings of the 25th APEC, 2010, p. 973-979
 
dc.identifier.citationThe 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2010), Palm Springs, CA., 21-25 February 2010. In Proceedings of the 25th APEC, 2010, p. 973-979 [How to Cite?]
DOI: http://dx.doi.org/10.1109/APEC.2010.5433384
 
dc.identifier.doihttp://dx.doi.org/10.1109/APEC.2010.5433384
 
dc.identifier.epage979
 
dc.identifier.hkuros178507
 
dc.identifier.isiWOS:000278142300154
 
dc.identifier.issn1048-2334
 
dc.identifier.openurl
 
dc.identifier.scopuseid_2-s2.0-77952168229
 
dc.identifier.spage973
 
dc.identifier.urihttp://hdl.handle.net/10722/129648
 
dc.languageeng
 
dc.publisherIEEE.
 
dc.relation.ispartofProceedings of the Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2010
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
 
dc.rightsIEEE Applied Power Electronics Conference and Exposition Conference Proceedings. Copyright © IEEE.
 
dc.rights©2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
 
dc.subjectCapacitor voltages
 
dc.subjectCurrent mode control
 
dc.subjectCurrent ripples
 
dc.subjectCurrent sensing
 
dc.subjectCurrent sensors
 
dc.titleA life prediction scheme for electrolytic capacitors in power converters without current sensor
 
dc.typeConference_Paper
 
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<contributor.author>Pong, BMH</contributor.author>
<date.accessioned>2010-12-23T08:40:41Z</date.accessioned>
<date.available>2010-12-23T08:40:41Z</date.available>
<date.issued>2010</date.issued>
<identifier.citation>The 25th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2010), Palm Springs, CA., 21-25 February 2010. In Proceedings of the 25th APEC, 2010, p. 973-979</identifier.citation>
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<description.abstract>Predicting the expected life of switching power supply is essential since unexpected failure of the subsystem can produce enormous loss. Electrolytic capacitor is the weakest among various power components in a power converter. Monitoring the Equivalent Series Resistance (ESR) variation of the electrolytic capacitor, achieving by voltage and current ripple, can estimate the converter life. Currently, Hall Effect sensor or others are current sensing options but all of them add series impedance to the capacitor and deteriorate capacitor voltage waveform. A sensor-less current waveform prediction method is proposed. Popular current mode control with the switch current signal is used. Repetitive sampling on the switch current allows capacitors current waveforms prediction without any current sensor at capacitor nodes. Together with the voltage waveform acquired, the ESR value can be calculated. &#169;2010 IEEE.</description.abstract>
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<rights>&#169;2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</rights>
<subject>Capacitor voltages</subject>
<subject>Current mode control</subject>
<subject>Current ripples</subject>
<subject>Current sensing</subject>
<subject>Current sensors</subject>
<title>A life prediction scheme for electrolytic capacitors in power converters without current sensor</title>
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Author Affiliations
  1. The University of Hong Kong