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雙頻率調(diào)制Boost變換器研究的中期報(bào)告Abstract:Inthismid-termreport,theresearchprogressofdual-frequencymodulationboostconverterissummarized.Specifically,theprincipleofdual-frequencymodulationtechnologyanditsadvantagesareintroduced.Thedesignprincipleoftheboostconvertertopologyisanalyzed,andtheworkingprincipleisgivenindetail.Moreover,themathematicalmodelofthedual-frequencymodulationboostconverterisderived,andthecontrolstrategybasedonproportional-integral-derivative(PID)controllerisproposed.Finally,thesimulationandexperimentalverificationresultsarepresented,indicatingthattheproposeddual-frequencymodulationboostconvertercaneffectivelyimprovetheefficiencyandreducetheinputcurrentripplecomparedwithtraditionalboostconverters.Keywords:dual-frequencymodulation,boostconverter,efficiency,inputcurrentripple.Introduction:Asthedemandforportableelectronicproductscontinuestogrow,thepowersupplycircuit,asoneofitskeycomponents,isfacingincreasingchallengesintermsofminiaturizationandefficiencyimprovement.Boostconverter,asawidelyusedDC-DCconversiontopology,hastheadvantagesofsimplestructureandwideinputvoltagerange.However,thetraditionalboostconverterhassomedrawbacks,suchashighinputcurrentripple,lowefficiencyandpoordynamicresponse.Inordertosolvetheseproblems,dual-frequencymodulationtechnologyhasbeenproposedandattractedincreasingattentioninrecentyearsduetoitsremarkableadvantages.PrincipleofDual-FrequencyModulationTechnology:Dual-frequencymodulationtechnologyisanewfrequencymodulationmethodwhichcombineshigh-frequencyandlow-frequencymodulation.Thebasicideaistocontrolthedutycycleofthehigh-frequencyswitchbythelow-frequencysignal,soastorealizethemodulationoftheoutputvoltage.Theadvantagesofdual-frequencymodulationtechnologyinclude:1)reducingtheinputcurrentrippleoftheboostconverter;2)improvingthedynamicresponseandstabilityoftheconverter;3)increasingtheefficiencyoftheconverterunderlightloadconditions.DesignPrincipleofDual-FrequencyModulationBoostConverter:Thedual-frequencymodulationboostconverterconsistsofalow-frequencysignalprocessingcircuit,ahigh-frequencyswitchingcircuitandanenergystoragecircuit.Thelow-frequencysignalprocessingcircuitgeneratesalow-frequencysignaltocontrolthedutycycleofthehigh-frequencyswitch.Thehigh-frequencyswitchingcircuitincludesahigh-frequencyswitch,adiodeandaninductor,whichactsasaboostcircuittoincreasetheoutputvoltage.Theenergystoragecircuitisformedbytheoutputcapacitor,whichsmoothstheoutputvoltage.WorkingPrincipleofDual-FrequencyModulationBoostConverter:Whenthelow-frequencysignalisappliedtothedutycyclecontrolcircuit,thehigh-frequencyswitchwillbeturnedonandoffaccordingtothedutycyclecontrolledbythelow-frequencysignal.Duringtheon-timeofthehigh-frequencyswitch,theinputvoltageisconnectedtotheinductor,andtheinductorstoresenergy.Duringtheoff-timeofthehigh-frequencyswitch,theinductorreleasesthestoredenergytotheoutputcapacitorthroughthediode.Thentheoutputvoltageisboosted.MathematicalModelandControlStrategyofDual-FrequencyModulationBoostConverter:Basedontheworkingprincipleofthedual-frequencymodulationboostconverter,themathematicalmodeloftheconverterisderived.Then,acontrolstrategybasedonproportional-integral-derivative(PID)controllerisproposedtoregulatetheoutputvoltage.ThePIDparametersaretunedbytheZiegler-Nicholsmethod.SimulationandExperimentalResults:Thesimulationandexperimentalresultsshowthattheproposeddual-frequencymodulationboostconvertercaneffectivelyreducetheinputcurrentrippleandimprovetheefficiencycomparedwithtraditionalboostconverters.Moreover,theproposedcontrolstrategybasedonPIDcontrollerhasagooddynamicperformanceandstability.Conclusion:Thismid-termreportsummarizestheresearchprogressofdual-frequencymodulationboostconverter.Theprincipleofdual-frequencymodulationtechnology,thedesignprincipleandworkingprincipleoftheconverterareintroduced.Moreover,themathematicalmodelandcontrolstrategybasedonPIDcontrollerareproposed,andsimulationan

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