High Frequency Transformer for switch mode power supply

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1、HighFrequencyTransformerforSwitchingModePowerSuppliesbyFuKeungWongB.Eng.andM.Phil.SchoolofMicroelectronicEngineeringFacultyofEngineeringandInformationTechnologyGriffithUniversity,Brisbane,AustraliaSubmittedinfulfillmentoftherequirementsofthedegreeofDoctorofPhilos

2、ophyMarch2004Thematerialinthisthesishasnotbeenpreviouslysubmittedforadegreeordiplomainanyuniversity.Tothebestofmyknowledgeandbelief,thethesiscontainsnomaterialpreviouslypublishedorwrittenbyanotherpersonexceptwhereduereferenceismadeinthethesisitself.______________

3、______FuKeungWongAcknowledgmentsAcknowledgmentsInlovingmemoryofmymother.Firstly,thankstomyPrincipleSupervisor,Prof.JunweiLuandAssociateSupervisor,Prof.DavidThielfortheirsupervisionandmanyinnovativesuggestions.Withouttheirconstantguidance,encouragementandsupport,t

4、histhesiscouldnothavebeencompleted.Iamalsogreatlyappreciatedtothefaiththeyhavebothshowninmyabilities.IwishtothanktheDean,Prof.BarryHarrisonforhissuggestionofthesiswriting.ManythanksgotoDr.DennisSweatman,Mr.RaymondSweatmanandDr.JishengHanfortheirsupportandhelpfula

5、dviceinthe“CleanRoom”.IamalsothankfultoDr.EddieTseandDr.KuanYewCheongfortheirinvaluablesuggestionsandencouragement.AsinceregratitudeisextendedtoMr.Wat,KaiSaufortheprovisionofprintedcircuitboardmaterialsandprecisefabricationwithnothingforreturn.Itisatruefriendship

6、.Specialthankstomyfatherforhislong-lastingsupportandguidance.Finally,mydeepgratitudegoestomywifeLai-Ching,forherunderstandingandcontinuoussupportwithlove.Sheispatientlylookingafterthechildrentofreemefromdomesticchores.Herspiritualinspirationandencouragementarealw

7、aysanimportantiAcknowledgmentspartofmylife.Alsonotforgettingmydaughters,Tin-YanandSze-Yan,theymakemyheadachedisappearedandputhappinessinmymind.iiContentsContentsAcknowledgementsiContentsiiiListofFiguresviiListofTablesxiListofPublicationsxiiiAbstractxvChapter1Intr

8、oduction1-11.1EssentialofHighFrequencyMagnetics1-21.2BriefOutlinetheExistingProblemsinHighFrequencyMagnetics1-41.3ChapterPreview1-51.4References1-6Chapter2Fund