DocumentCode :
1441932
Title :
Failure prediction of electrolytic capacitors during operation of a switchmode power supply
Author :
Lahyani, Amine ; Venet, Pascal ; Grellet, Guy ; Viverge, Pierre-Jean
Author_Institution :
Univ. Claude Bernard, Villeurbanne, France
Volume :
13
Issue :
6
fYear :
1998
fDate :
11/1/1998 12:00:00 AM
Firstpage :
1199
Lastpage :
1207
Abstract :
Electrolytic filter capacitors are frequently responsible for static converter breakdowns. To predict these faults, a new method to set a predictive maintenance is presented and tested on two types of converters. The best indicator of fault of the output filter capacitors is the increase of ESR (equivalent series resistance). The output-voltage ripple ΔVo of the converter increases with respect to ESR. In order to avoid errors due to load variations, ΔVo is filtered at the switching frequency of the converter. The problem is that this filtered component is not only dependent on the aging of the capacitors, but also on the ambient temperature, output current, and input voltage of the converter. Thus, to predict the failure of the capacitors, this component is processed with these parameters and the remaining time before failure is deduced. Software was developed to establish predictive maintenance of the converter. The method developed is as follows. First, a reference system including all the converter parameters was built for the converter at its sound state, i.e., using sound electrolytic filter capacitors. Then, all these parameters were processed and compared on line to the reference system, thereby, the lifetime of these capacitors was computed
Keywords :
ageing; electric resistance; electrolytic capacitors; failure analysis; maintenance engineering; power convertors; switched mode power supplies; ambient temperature; capacitor aging; electrolytic capacitors; electrolytic filter capacitors; equivalent series resistance; failure prediction; input voltage; output current; output filter capacitor fault; output-voltage ripple; predictive maintenance; static converter breakdowns; switching frequency; switchmode power supply; time before failure; Aging; Capacitors; Electric breakdown; Filters; Load management; Paramagnetic resonance; Predictive maintenance; Switching converters; Switching frequency; Testing;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/63.728347
Filename :
728347
Link To Document :
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