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Study and analysis of failure modes of the electrolytic capacitors and thyristors, applied to the protection system of the LHC (Large Hadron Collider); Etude et analyse des modes de defaillances des condensateurs electrolytiques a l'aluminium et des thyristors: appliquees au systeme de protection du LHC (Large Hadron Collider)

Abstract

The study presented in this thesis is a contribution about the analysis of failures modes of electrolytic capacitors and thyristors. The studied components are main elements of the protection system of the superconductive magnets of the LHC. The study of the ageing of the electrolytic capacitors has shown that their reliability is strongly related to their technological characteristic. Evolution of their principal indicator of ageing (ESR) can be modeled according to different laws chosen according to their running mode. It appears that the prediction of failure of these components other than that due to wear can be only statistical taking into account the many causes of failure involving various modes of failure. In order to be able to evaluate influence of the ageing of the electrolytic capacitors on a system, simple models taking into account this parameters as well as the effective temperature of the component are proposed. An acceptable precision taking into account the simplicity of the models is obtained. The study of the thyristors has shown that these components have little drift of parameters in static ageing, on the other hand of many failures by short-circuit were observed. These failures always have a local origin, and are due  More>>
Authors:
Publication Date:
Jul 15, 2003
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-7421
Resource Relation:
Other Information: TH: These genie electrique; 66 refs.; Also available from Universite Lyon 1. Bibliotheque universitaire Sciences, 43 boulevard du 11 Novembre 1918, BP 2215, Batiment 901, 69603 - Villeurbanne Cedex (France)
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AGING; ALGORITHMS; CAPACITORS; CERN LHC; COMPUTERIZED SIMULATION; ELECTRICAL FAULTS; EQUIPMENT PROTECTION DEVICES; FAILURE MODE ANALYSIS; LEAKAGE CURRENT; POWER SUPPLIES; RELIABILITY; SUPERCONDUCTING MAGNETS; TEMPERATURE DEPENDENCE; TESTING; THYRISTORS; TIME DEPENDENCE
OSTI ID:
21080798
Research Organizations:
Universite Claude Bernard, 69 - Lyon (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0801564093536
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
188 pages
Announcement Date:
Oct 04, 2008

Citation Formats

Perisse, F. Study and analysis of failure modes of the electrolytic capacitors and thyristors, applied to the protection system of the LHC (Large Hadron Collider); Etude et analyse des modes de defaillances des condensateurs electrolytiques a l'aluminium et des thyristors: appliquees au systeme de protection du LHC (Large Hadron Collider). France: N. p., 2003. Web.
Perisse, F. Study and analysis of failure modes of the electrolytic capacitors and thyristors, applied to the protection system of the LHC (Large Hadron Collider); Etude et analyse des modes de defaillances des condensateurs electrolytiques a l'aluminium et des thyristors: appliquees au systeme de protection du LHC (Large Hadron Collider). France.
Perisse, F. 2003. "Study and analysis of failure modes of the electrolytic capacitors and thyristors, applied to the protection system of the LHC (Large Hadron Collider); Etude et analyse des modes de defaillances des condensateurs electrolytiques a l'aluminium et des thyristors: appliquees au systeme de protection du LHC (Large Hadron Collider)." France.
@misc{etde_21080798,
title = {Study and analysis of failure modes of the electrolytic capacitors and thyristors, applied to the protection system of the LHC (Large Hadron Collider); Etude et analyse des modes de defaillances des condensateurs electrolytiques a l'aluminium et des thyristors: appliquees au systeme de protection du LHC (Large Hadron Collider)}
author = {Perisse, F}
abstractNote = {The study presented in this thesis is a contribution about the analysis of failures modes of electrolytic capacitors and thyristors. The studied components are main elements of the protection system of the superconductive magnets of the LHC. The study of the ageing of the electrolytic capacitors has shown that their reliability is strongly related to their technological characteristic. Evolution of their principal indicator of ageing (ESR) can be modeled according to different laws chosen according to their running mode. It appears that the prediction of failure of these components other than that due to wear can be only statistical taking into account the many causes of failure involving various modes of failure. In order to be able to evaluate influence of the ageing of the electrolytic capacitors on a system, simple models taking into account this parameters as well as the effective temperature of the component are proposed. An acceptable precision taking into account the simplicity of the models is obtained. The study of the thyristors has shown that these components have little drift of parameters in static ageing, on the other hand of many failures by short-circuit were observed. These failures always have a local origin, and are due to defects of the components. The breakdown voltage strongly depends on the quality of the thyristor as well as the technology employed. (author)}
place = {France}
year = {2003}
month = {Jul}
}