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1、电子镇流器故障分析（Electronicballastfailureanalysis）Commonfailureanalysisofelectronicballasts!AquoteElectronicballastisanewtypeofhighvoltage(220v),ba(microelectronics)andelectricvacuum,opticaltechnologyasoneofthehigh-techenergy-savingelectronicproducts,electriclightsourcecom
2、paredwithtraditionalballast,energysaving,lowstartingvoltage,highpowerfactor,lowtemperaturerise,nostroboscopic,nonoiseandextendingtheservicelifeofthetube,hasbeenwidelyusedinfluorescentlamps,metalhalidelamp,sodiumlamp,neonlights,andotherproducts,itsmarketshareincrease
3、dyearbyyear,hasatendencytoreplacethetraditionalballast.However,morethan80%oftheelectronicballastproductsproducedinChinaadoptthehalf-bridgeinvertercircuitcomposedofdiscretecomponents,andmorethan70%oftheperformanceispoor.Domesticproductionenterprisesofelectronicballas
4、tsasmanyas400-500,thereareanumberofproductionunitswithsmallscale,lowoutput,lackofnecessarytestingmeansandqualitycontrolequipment,improperselectionofcomponentsandwithoutstrictscreening,usedcomponentsconsistencyispoor,theperformanceisnotstable,adirectimpactontheoveral
5、lqualityofelectronicballasts.Suchasworkinglife,powerfactorandharmoniccontent,comparedwithinternationalwell-knownbrands,thereisstillalargegap.Itisanimportantresearchsubjecttostudythecommonfaultsofelectronicballastproductsandtheirfailuremechanism,andproposecorrespondi
6、ngimprovementmeasurestoimprovethequalityofelectronicballastproducts.2.AnalysisoffailuremechanismThebasicfunctionofelectronicballastsistoconvertthepowersupplyof50Hzto20~50kHzwithhighfrequencypower,anddirectlylightthefluorescentlamptube.Atpresent,themostwidelyusedelec
7、tronicballastisseriesresonantcircuit,whichconsistsofrectifierfiltercircuit,powerswitchanddrivecircuit,ballastandfilamentloadcircuit.Shortlifeofdomesticelectronicballasts,consistency,andthecauseofthepoorreliabilitypoorexceptforcircuitdesign,ballastandlampbadmatchinga
8、ndpowervoltagefluctuationbigfactors,suchascomponentparametersofreliabilityandconsistencyispoor,isalsoanimportantreason.Althoughtheresultso
