2015 Current-Balancing Technique for Interleaved Voltage Source Inverters With Magnetically Coupled Legs Connected in Parallel

2015 Current-Balancing Technique for Interleaved Voltage Source Inverters With Magnetically Coupled Legs Connected in Parallel

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时间:2019-07-31

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1、IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.62,NO.3,MARCH20151335Current-BalancingTechniqueforInterleavedVoltageSourceInvertersWithMagneticallyCoupledLegsConnectedinParallelGabrielJ.Capella,JosepPou,SeniorMember,IEEE,SalvadorCeballos,JordiZaragoza,Member,IEEE,andVassiliosG.Agelidis,SeniorMemb

2、er,IEEEAbstract—Connectinglegsinparallelinavoltagesourcecurrentsratherthanvoltagesareincreasedinordertoachieveinverterisawaytoincreasetheoutputcurrentand,thus,higherpowerinsomefields.Thiscanbeattainedeitherwithitsratedpower.Theconnectioncanbemadeusingei-VSIsmadeupoflegsconnectedinparallel(ifal

3、lthelegsthercoupledoruncoupledinductors,andachievinganareconnectedtoacommondcbus)orbymeansofparallelevencontributiontotheoutputcurrentfromallthelegsisacrucialissue.Circulatingcurrentsproduceadditionalconnectionofinverters(eachonewithitsowndcbus)[5],lossesandstresstothepowerdevicesoftheconvert

4、er.[6].Inaddition,inverterswithlegsconnectedinparallelareTherefore,theyshouldbecontrolledandminimized.Anmodularandbecauseofthat,theirproductionandmaintenanceefficienttechniquetoattainsuchbalancewhencoupledbecomelessexpensive.Moreover,theyqualifyfortheimple-inductorsareusedispresentedinthispape

5、r.Thepro-mentationoffault-toleranttechniques,thusofferingimprovedposedtechniquecanalsobeusedwhentheinductorsareuncoupled,sinceitisaparticularcasewherethecou-overallreliability[7],[8].plingcoefficientsarezero.ThistechniquedoesnotincludeParallel-connectedlegsofaVSIrequiretheuseofinduc-proportion

6、al–integralcontrollersanddoesnotrequireanytorstoobtainasingleoutputvoltagefromseveralinputlegsparametertuningeither.Theexactcontrolactionneededto[9][14].Theuseofuncoupledinductorsdoesnotbringanyreachcurrentbalanceisstraightforwardlycalculatedandsizereductionintheamountofmagneticmaterialneeded

7、butapplied.Experimentalresultsareshowninthispapertofacilitatesmodularityandmanagementincaseoffaultylegsverifytheefficiencyoftheproposedbalancingmethod.[10].Theuseofcoupledinductorsprovidesahigh-impedanceIndexTerms—Currentsharing,interleaving,p

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