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1、Subject：ResearchonLLCHalf-BridgeResonantConverterSpecialty：PowerElectronics&PowerDrivesName：ZhanMei(Signature)Instructor：LiuShulin(Signature)ABSTRACTResonantconverterhastheadvantageofhigheroperationfrequency,higherefficiency,lowerswitchingloss,smallerv
2、olume,lowerEMInoiseandlowerswitchingstresscomparedwiththePWMconverter.Resonancetopologyisalotofmorephyletic,theLLCresonantconverterhastheprimarysideswitchtubeeasytorealizefullloadrangeofZVS,secondarydiodeeasyrealizeZCSandinputvoltagerangewide,etc.andth
3、usreceivedextensiveattention.Thisthesisdiscussesthekindsofsoftswitchtechnologyanditsdevelopmenttrend,series,parallelandseries-parallelthreetraditionalsoft-switchingresonantconverterareanalyzedtheoretically,andtheadvantagesanddisadvantagesaresummarized.
4、Then,inthetraditionalLCresonantconverterbasedonaddingaparallelinductanceLLChalf-bridgeresonanceconverterinthecompositionoftheworkareahascarriedontheclassification,accordingtothetworesonantfrequencyfw(series-parallelresonantfrequency)andfo(seriesresonan
5、cefrequency),itcanbedividedintothreeworkarea,basedontheworkingprincipleofthedifferentregionsofthein-depthanalysisoftheworkbetweenthetworesonancefrequencyisobtainedLLChalf-bridgeresonanceconvertercanrealizetheoriginalsideoftheswitchtubeandvicesideofrect
6、ifierdiodesoftswitch.BasedonFHA(firstharmonicapproximation)methodforthegaincharacteristicsoftheLLChalf-birdgeresonantconverterhascarriedonthethoroughdiscussion,andconclusionisdeducedaharmonicparametersdesignmethod.Alsoanalyzestheconverterofnoloadandsho
7、rtcircuitcharacteristic.Basedontheabovetheoreticalanalysisanddesignmethods,developedaplatformbasedonL6599LLChalf-bridgeresonanceconverterprototype.Throughtheprototypeistestedandtheresultsareanalyzed,thetheoreticalcorrectionandthefeasibilityofdesignmeth
8、odareverified.Keywords:LLChalf-bridgeresonantconverter;Soft-switching;PWM;DesignofParametersThesis:ApplicationResearch目錄目錄1緒論...............................................................................................................
