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1、MethodologyforSwitchingCharacterizationofPowerDevicesandModulesJosephBrandonWitcherThisthesissubmittedtotheFacultyofVirginiaPolytechnicInstituteandStateUniversityinpartialfulfillmentoftherequirementsforthedegreeofMasterofScienceInElectricalEngineeringApproved:____________
2、____________DushanBoroyevich,Chair______________________________________________JasonLaiHardusOdendaalJanuary29,2002Keywords:Switchingcharacteristics,powerMOSFET,IPEM,powermoduleCopyright2003,JosephBrandonWitcherMethodologyforSwitchingCharacterizationofPowerDevicesandModu
3、lesJosephBrandonWitcherAbstractInmodernpowerelectronicssystemsthereisagrowingtrendtoreplacediscretedeviceswithintegratedpowerelectronicmodules(IPEMs).Inthisway,severalcomponentscanbereplacedbyasinglecomponent.Byusingprefabricatedbuildingblocks,theengineersimplifiesthedesi
4、gnprocess,reducingthetotaldesigncycletimeandcost.Byintegratingonlythenecessarycomponentstoprovidepowerswitching,theenduserhasapre-optimizedbuildingblockwiththeflexibilitytobeusedinalargevarietyofapplications.Besidessimplifyingthedesignprocess,powermodulesshouldbedesignedi
5、nsuchawayastoimprovetheperformanceofthepowerconverter.ThisbegsthequestionastohowbesttojudgeifoneIPEMhasbetterperformancethananotherorbetterperformancethanitsdiscretecounterpart.Inanalyzingaconverter’sperformance,popularcriteriaincludeefficiency,powerdensity,devicestresses
6、,andEMI.AllofthesecriteriaarestronglylinkedtotheswitchingcharacteristicsoftheIPEM’spowerdevices.ThisthesisisacomprehensivestudyoftherequirementsforobtainingandanalyzingtheswitchingcharacteristicsoftheIPEM’spowerdevices.Itoutlinestheimportantswitchingcharacteristicsandthei
7、mplicationsofeachcharacteristiconconverterperformance.Itdealswiththerelevantmeasurementissues,specificallyaddressingtheminimumrequirements,whichsensorsaremostsuitable,andproblemsleadingtoinaccuratedata.Aparametricstudyisconductedtodeterminetheeffectsofseveralcircuitandope
8、ratingparametersontheswitchingcharacteristics.Usingtheresultingdataandtheknowledgefromthemeasure