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1、PowerElectronicCircuitTopologyWILLIAMMcMURRAY,FELLOW,IEEEInvitedPaperAgeneralizedconceptof“sources”embracingbothpowergen-thecharacteristicsoftheswitchingdevices.Controloftheeratorsandpowerconsumerssimplifiesthebasictopologicalconverter,fundamentally,reducestocontrol
2、lingtheonioffaspectsofpowerelectronicconvertercircuits,whicharereducedstateoftheswitchesinthepropersequencetoperformthetoanarrayofswitchesforselectivelyinterconnectingtwosourcesystems.Capacitiveandinductivefilterscanmodifythenatureofdesiredconversionfunctionwhileobs
3、ervingtheserestric-thesystems,becausetheyactasshort-timesourcesandeffectivelytions.Thenormalcontrolmayneedtobemodifiedforpro-determinewhethertheconverterseesavoltagesourceoracurrenttectionagainstoverloadsandfaults.sourceatitsterminals.Thesedifferingsourcequalitiesre
4、quiredif-Theselectionoftopologyforaconvertermustconsiderferenttypesofswitchingdevicesandhaveextensiveramificationsthefollowingfactors:inthemodeofoperationoftheequipment.Thispaperpresentssomebasicconfigurationsanddescribestheirsignificantproper-Thebasicconversionfunc
5、tionrequired.ties,withemphasisonthemostwidelyusedcircuitsinhigh-power*Thepropertiesoftheswitchingdevicesthatareavail-equipment,particularlyacldcconverters.ableinthenecessarysize.Thenumber,size,andcostoffilterelementsandotherINTRODUCTIONaccessories.Electricalloadsoft
6、enrequire,orwouldprefer,apowerThelossesandstressesinvolvedinswitching.supplyhavingcharacteristicsdifferentfromtheavailableEaseofcontrolandprotection.source.ThefunctionofpowerelectronicconvertersistoperformthisdesiredtransformationwithminimumlossesAsinanyotherfieldof
7、engineering,therearemanytrade-andacceptablecost.Lowlossdemandsaswitchingmodeoffs.Certaincircuitarrangementshaveacombinationofofoperation,andmanytypesofsemiconductordevicescharacteristicsthatmeettheneedsofmanyapplicationshavebeenoptimizedforthispurpose.However,switch
8、ingandarewidelyused.Otherarrangementshavespecialchar-resultsindiscontinuouspowerflowthroughthedevices,acteristicsthatareneededinamorelimit
