基于數(shù)字控制的雙降壓式多電平逆變器的設計與實現(xiàn).pdf

1、南京航空航天大學碩士學位論文基于數(shù)字控制的雙降壓式多電平逆變器的設計與實現(xiàn)姓名：楊偉申請學位級別：碩士專業(yè)：電子科學與技術、電路與系統(tǒng)指導教師：王成華201012基于數(shù)字控制的雙降壓式多電平逆變器的設計與實現(xiàn)iiABSTRACTAtpresentmultilevelinverterisaresearchhothowtosimplifythetopologyimprovethereliabilityofcircuitisoneofthek

2、eyissues.Basedonbridgemultilevelinverteralotofimprovementmeasureshavebeenproposedbyscholarsathomeabroadgreatachievementshavebeenobtained.Fromanotherpointofviewusingdualbuckcircuitasthebasicunittobuildmultilevelinverteran

3、oveldualbuckfivelevelinverterhasbeendesigneddemonstratedinthispaperthisinverterretainsmeritsofdualbuckhalfbridgeinverterbenefitstothesimplificationofclampcircuitimprovementofsystemstability.Firstlyoverallschemedesignofdu

4、albuckfivelevelinverterhasbeendesignedinthispaperwhichincludestopologybuildingcomparisonionofclosedloopcontrolstrategymodulationschemeSecondlywkingprincipleoftheproposedinvertersuchasswitchwkingmodesclosedloopcontrolstra

5、tegyvoltagebalancedecouplingcontrolhasbeenconcretelyanalyzedThirdlyaccdingtooverallschemedesigndetaildesignsoftheinverterhavebeencarriedoutincludinghardwaredesignssuchasmainpowercircuitssamplingcircuitsconditioningcircui

6、tsprotectioncircuitsdrivingcircuitshardwarepartsofdigitalcontrollerPWMsignaldistributionunitcircuitssoftwaredesignssuchasrealizationofdigitalPIcontrolstrategyalgithmfSPWMbasedonDSPgenerationofpartitioncontrolsignals.Fina

7、llysystemsimulationusingsabersoftware1kWprototypeofthepresentedinverterhavebeencarriedout.Resultsofsimulationexperimentshowthatthedesignisreasonablefeasibletheinvertergetsagoodperfmancebesidesoutputtingfivelevelvoltagete