A new family of matrix converters

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1、IECONOl:The27thAnnualConferenceoftheIEEEIndustrialElectronicsSocietyANewFamilyofMatrixConvertersRobertW.EricksonOsamaA.Al-NaseemColoradoPowerElectronicsCenterColoradoPowerElectronicsCenterUniversityofColoradoUniversityofColoradoBoulder,CO80309-0425,US

2、ABoulder,CO80309-0425,USArwe@colorado.eduAbstraci-Anewfamilyofmatrixconvertersisintroduced,thatII1employsrelativelysimplevoltage-clampedbusesandcangener-atemultilevelvoltagewaveformsofarbitrarymagnitudeandfrequency.Thebasicconfigurationincludesanine-s

3、witchmatrixthatusesfour-quadrantswitchcells.Eachfour-quadrantswitchcellresemblesafull-bridgeinverterandcanassumethreevolt-agelevelsduringconduction.Semiconductordevicesinaswitchcellareclampedtoaknownconstantdcvoltageofacapacitor.Controloftheinputandou

4、tputvoltagewaveformsofthepro-posedconvertercanbeachievedthroughspacevectormodula-tion.Simulationresultsshowhowtheconvertercanoperatewithanyinputandoutputvoltages,currents,frequencies,andpowerfactorswhilemaintainingconstantdcvoltagesacrossallswitchcell

5、capacitors.Fig.1Conventionalthree-leveldc-linkinverter.Onephaseisillustrated.withthisinverteristhatthevoltagesourcesVofeachswitchI.MTRODUCTIONcellmustgeneratetheaveragepowersuppliedbytheinverter,andhencefloatingsourcesofdcpowerarerequired.Multilevelco

6、nversionhasattractedsignificantattention,asaTheobjectiveofthispaperistodescribeanac-to-variable-waytoconstructarelativelyhigh-powerconverterusingacmultilevelmatrixconvertersystembasedonthesimplemanyrelatively-smallpower-semiconductordevices[1,2].switc

7、hcellsofFig.1.ThebusbarstructuresoftheproposedThisapproachhastheadvantagesofreducedswitchinglossconverterarethereforerelativelyeasytoconstruct.Theuseofandreducedharmoniccontentofoutputacwaveforms.Theamatrixconfigurationeliminatestheneedforthevoltagepe

8、akvoltagesappliedtothesemiconductordevicesaresourcesVtosupplyaveragepower.Therefore,thesevoltageclampedtocapacitorswhosedcvoltagescanbecontrolledsourcescanbereplacedbysimplecapacitors.viafeedback.WhentheinputandoutputvoltagemagnitudesAnewappro