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Conference Paper: A life prediction scheme for electrolytic capacitors in power converters without current sensor

TitleA life prediction scheme for electrolytic capacitors in power converters without current sensor
Authors
Pang, HMPong, BMH
KeywordsCapacitor voltages
Current mode control
Current ripples
Current sensing
Current sensors
Issue Date2010
PublisherIEEE.
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 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.
Persistent Identifierhttp://hdl.handle.net/10722/129648
ISSN
1048-2334
ISI Accession Number ID
WOS:000278142300154

 

DC FieldValueLanguage
dc.contributor.authorPang, HMen_US
dc.contributor.authorPong, BMHen_US
dc.date.accessioned2010-12-23T08:40:41Z-
dc.date.available2010-12-23T08:40:41Z-
dc.date.issued2010en_US
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. 973-979en_US
dc.identifier.issn1048-2334-
dc.identifier.urihttp://hdl.handle.net/10722/129648-
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.languageengen_US
dc.publisherIEEE.-
dc.relation.ispartofProceedings of the Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2010-
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 sensoren_US
dc.typeConference_Paperen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1048-2334&volume=&spage=973&epage=979&date=2010&atitle=A+life+prediction+scheme+for+electrolytic+capacitors+in+power+converters+without+current+sensor-
dc.identifier.emailPong, BMH: mhp@eee.hku.hken_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/APEC.2010.5433384-
dc.identifier.scopuseid_2-s2.0-77952168229-
dc.identifier.hkuros178507en_US
dc.identifier.spage973-
dc.identifier.epage979-
dc.identifier.isiWOS:000278142300154-
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.issnl1048-2334-

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