DCDC级联变换电路设计与实现英文文献和翻译

DC/DC级联变换电路设计与实现DC-DCconverter(DC/DC)converteriswidelyusedinremoteanddatacommunications,computer,officeautomationequipment,industrialinstrumentation,military,aerospaceandotherfieldsrelatedtothenationaleconomyallwalksoflife.Dividedbythesizeoftheratedpower,theDC/DCcanbedividedinto750W,750W1Wand1Wtothefollowingthreecategories.Inthe1990s,thegrowthrateoftheDC/DCconverterinlowpowerrangegreatlyimproved,6Wof~25WDC/DCconvertergrowthrate,thisisbecausetheyareusedextensivelyforDCmeasurementandtestequipment,computerdisplaysystems,computersandmilitarycommunicationssystems.Bythelow-powerhigh-speedmicroprocessors,DC/DCconvertertothedirectionofthepowerdevelopmentisaninevitabletrend,sothefastergrowthrateof251W~750WDC/DCconverter,whichitisusedservicesofmedicalandlaboratoryequipment,industrialcontrolequipment,telecommunicationsequipment,multi-channelcommunicationandtransmissionequipment,DC/DCconverterinthefieldofremoteanddigitalcommunicationshasbroadapplicationprospects.DC/DCconverterwilltransformafixedDCvoltagetoaDC/DC级联变换电路设计与实现variableDCvoltage,thistechniqueiswidelyusedinthetrolleybus,subway,trains,electriccarscontinuouslyvariabletransmissionandcontrol,whilemakingtheabovecontrolhasacceleratedstablerespondquicklytoperformance,andatthesametimereceivetheeffectofsavingenergy.DCchopperinsteadoftherheostatsavings20%to30%oftheenergy.DCchoppercannotonlyplaytheroleoftheregulator(SMPS),canalsoplayaroleeffectivelysuppressthenoiseofthegridsideharmoniccurrent.DC/DCconverterhasbeencommercialized,themoduleuseshigh-frequencyPWMtechnology,theswitchingfrequencyisabout500kHz,thepowerdensityof0.31W/cm3~1.22W/cm3.WiththedevelopmentoftheLSI,thepowersupplymoduletoachievetheminiaturizationisnecessarytocontinuouslyimprovetheswitchingfrequencyandanewcircuittopology.Atpresent,somecompanieshavealreadydevelopedandproducedthesecondzero-currentswitchingandzerovoltageswitchingpowersupplymodule,powerdensityhasdramaticallyincreased.Therapiddevelopmentoftheelectronicsindustryhasgreatlypromotedthedevelopmentoftheswitchingpowersupply.Thehigh-frequencyswitchingpowersupplyminiaturizationtechnologyhasbecomethemainstreamofmodernelectronicDC/DC级联变换电路设计与实现devices,powersupplysystem.Inthefieldofelectronicdevices,usuallytorectifiercalledapowerDC/DCconverterwillbecalledthesecondarypowersupply.OncetheroleofthepowersupplyissingleorthreephaseACmainstotransformanominal48VDCpowersupply.Inpowerelectronicdevicesusingatraditionalphasedpowersupplyhasbeenreplacedbyhigh-frequencyswitchingpowersupply,highfrequencyswitchingpowersupply(alsoknownastheswitchtypeRectifierSMR)MOSFETorIGBThighfrequencywork.Theswitchingfrequencyisgenerallycontrolledwithintherangeof50kHz~100kHz,highefficiencyandminiaturization.Inrecentyears,theswitchingregulatorpowercapacitycontinuestoexpand,stand-alonecapacityhasbeenexpandedtofrom48V/12.5A,48V/20A48V/200A,48V/400A.AwiderangeofelectronicequipmentusedintheICpowersupplyvoltagevaries,theelectronicpowersupplysystem,theuseofhighfrequencyhighpowerdensityDC/DCisolatedpowersupplymodulefromtheintermediatebusvoltage(typically48VDC)transformintoavarietyofDCvoltage,cangreatlyreducethewearandtear,easymaintenance,installationandcompatibilizerisveryconvenient.Generalcanbedirectlyinstalledinthestandardcontrolpanel,therequirementsofDC/DC级联变换电路设计与实现thesecondarypowersupplyisahighpowerdensity.Becauseofthegrowingcapacityofelectronicdevices,powercapacitywillcontinuetoincrease.DC/DCswitchingpowersupplyforitshighefficiency,highintegrationfeaturesinportableelectronicproductsinawiderangeofapplications.Withthedevelopmentofintegratedcircuittechnology,thestructureiscomplex,butthebetterperformanceofthepeakcurrentthemodePWMDC/DCswitchingpowerconvertershasbecomethemarketmainstream.ClassificationanddirectionofdevelopmentofswitchmodepowersuppliesTheswitchmodepowersuppliesistheuseofmodernpowerelectronicstechnology,tocontroltheratiooftheswitchingtransistortoturnonandofftomaintainastableoutputvoltagepowersupply.SwitchmodepowersuppliescanbedividedintotheAC/ACpowersupply,DC/DCpowersupply,AC/DCpowersupplyandDC/ACpowersupply,themostwidelyusedDC/DCswitchingpowersupply.DC/DCswitchingpowersupplyisdividedintoinductiveswitchingpowersuppliesandcapacitorswitchingpowersupply.A.InductiveswitchingpowersupplyInductiveswitchingpowersupplyinductanceasthemainDC/DC级联变换电路设计与实现energystoragecomponentstoprovideacontinuouscurrenttotheloadcanbedonethroughthedifferenttopologiesofbuck,boost,andnegativepressurefunction.Inductiveswitchingpowersupplywithveryhighconversionefficiency,theenergylossofitsworkinclude:1)internalorexternalMOSFETconductionlosses,mainlywiththedutycycleofMOSFETon-resistance;2)dynamiclossincludingthepowerMOSFETturnsontheswitchinglossesanddriveMOSFETswitched-capacitorpowerlosswiththeinputvoltageandswitchingfrequency;31staticloss,withIcinternalleakagecurrent.Theloadcurrentislarge,theabovelossesarerelativelysmall,sotheinductiveswitchingpowersupplycanreach95%efficiency.Theselosseswillberelativelylargeraffecttheconversionefficiencydecreases,buttheload.Thedrawbackoftheinductiveswitchingpowersupplypowerprogr