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1、IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.12,DECEMBER20135593AnalysisandPWMControlofSwitchedBoostInverterAddaRavindranath,StudentMember,IEEE,SantanuK.Mishra,SeniorMember,IEEE,andAvinashJoshiAbstractTheZ-sourceinverter(ZSI)employsanLCimpedancenetworkbetweenthemaininvert
2、erbridgeandthepowersource.TheuniquefeatureoftheZSIisthatitcanoperateeitherinbuckorboostmodewithawiderangeofobtainableoutputvoltagesfromagiveninputvoltage.Thistopologyalsoexhibitsbetterelectromagnetic-interferencenoiseimmunitywhencomparedtoatraditionalvoltage-sourceinverter(VSI
3、).However,theLCimpedancenetworkofZSIsignificantlyincreasesthesizeandcostofthepowerconverterandcanmakeitunsuitableforlow-powerapplications.Thispaperproposesanoveltopologycalledswitchedboostinverter(SBI)whichexhibitssimilarad-vantagesofZSIwithlowernumberofpassivecomponentsandmore
4、activecomponentscomparedtoZSI.Thesteady-stateandsmall-signalanalysesofSBI,alongwithitspulsewidthmodulationFig.1.SchematicofaZSI.(PWM)controlstrategies,havebeendiscussedinthispaper.ThispaperalsopresentsacomparisonofSBIandZSIwiththesameHowever,theimpedancenetworkwithtwoinductors
5、andtwoinputandoutputparameters.ThetheoreticalanalysisgivenincapacitorsusedintheZSIsignificantlyincreasesthesizeandthispaperhasbeenvalidatedusingalaboratoryprototypeofSBI,costofthepowerconverter.Therefore,thistopologymaynotandtheexperimentalresultsarepresentedforverification.Theb
6、esuitableforlow-powerapplicationswheresize,weight,andexperimentalharmonicspectrumoftheinvertersoutputvoltagewiththeproposedPWMtechniqueisalsoplottedandcomparedcostarethemainconstraints.withthatofatraditionalVSI.AlltheexperimentalresultsshowThispaperpresentsanovelpowerconverter
7、calledswitchedgoodcorrelationbetweentheoryandexperiments.boostinverter(SBI)whichworkssimilarlytoaZSI.ThisIndexTermsHarmonicanalysis,pulsewidthmodulationconverterusesmoreactivecomponentsandlowernumberof(PWM),small-signalanalysis,switchedboostinverter(SBI).inductorsandcapacitors
8、comparedtotheoriginalZSIwhileretainingitsoperationaladvantage
