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1、电子镇流器故障分析（Faultanalysisofelectronicballast）Analysisofcommonfaultsinelectronicballasts!2010-10-0716:491.introductionTheelectronicballastisanewsetofpower(220V)andweak(Microelectronics),opticalandelectricvacuumtechnologyasoneofthehigh-techelectronicenergy-savingelectriclightsourceproducts,compare
2、dwiththetraditionalinductanceballast,energysaving,lowstartingvoltage,highpowerfactor,lowWenSheng,noflicker,nonoise,prolongedtubelife,hasbeenwidelyusedinfluorescentlamp,metalhalidelamp,sodiumlamp,neonlampandotherproducts,itsmarketshareincreasedyearbyyear,thetrendistoreplacetraditionalinductance
3、ballast.Butmorethan80%ofthedomesticproductionoftheelectronicballastproductscomposedofdiscreteelements,morethan70%ofthehalfbridgeinvertercircuitperformanceispoor;thedomesticproductionofelectronicballastsenterprisesupto400-500,whichhasaconsiderablenumberofproductionunitsofsmallscale,lowoutput,la
4、ckofdetectionmeansandqualitycontrolofthenecessaryequipment,componentsandwithoutimproperselectionstrictscreening,componentsusedbythepoorconsistency,unstableperformance,directlyaffectstheoverallqualityoftheelectronicballast.Suchasworklife,powerfactors,harmoniccontent,etc.,comparedwithinternation
5、allyrenownedbrands,thereisstillabiggap.Itisanimportantresearchtopictostudythecommonfaultsandthefailuremechanismoftheelectronicballastproducts,putforwardthecorrespondingimprovementmeasures,andimprovethequalityofelectronicballastproducts.2AnalysisoffaultmechanismThebasicfunctionoftheelectronicba
6、llastistoconvert50Hzpowerfrequencyto20~50kHzhighfrequencypowersupply,andtodirectlyilluminatethefluorescenttube.Atpresent,themostwidelyusedelectronicballastisseriesresonantcircuit,whichconsistsofthreeparts:linerouting,rectifierandfiltercircuit,powerswitchanddrivecircuit,ballastcircuitandfilamen
7、tloadcircuitCausethedomesticelectronicballastofshortservicelife,reliabilityandconsistencyofthereasonsforthepoorpoor,exceptforcircuitdesign,ballastandlamptubeandpowersupplyvoltagefluctuationandotheradversefactors,andpoorconsistencyofcomp
