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1、MinimumSwitchingLossesBasedOnVoltageSpaceVectorPulseWidthModulationTechnique基于电压空间矢量PWM技术的最小开关损耗研究孙闯（上海发电设备成套设计研究院，学号P200909071）MinimumSwitchingLossesBasedOnVoltageSpaceVectorPulseWidthModulationTechniqueSunChuang(ShanghaiPowerEquipmentResearchInstitute,MinhangDistrict,Shanghai,200
2、240,China)ABSTRACT:ThroughstudyingtheliteratureofMinimumSwitchingLossesVSVPWMtechniques,theresearchcontent,researchmethodsandfindingsoftheminimumswitchinglossesofthevoltagespacevectorPWMtechnology(VSVPWM)canbesummarized.KEYWORDS:voltagespacevectorPWM;switchinglosses;researchcontent
3、;researchmethods;techniqueFindings1.ResearchcontentIntheliteratureofstudyandsimulationofminimumswitchinglossesVSVPWMtechnology,throughanalysisthedistributionofeightvectorsofthevoltagespacevectorPWMtechnology(VSVPWM),itcanbefoundthatthelocationofnon-switchingsectorscancontinuouslyva
4、rywithinacertainrange.Onthebasis,aprogramofVSVPWMdependingontheloadpowerfactorangleofdynamicadjustmentofnon-switchingsectorsisputforward,anditcanmakethenon-switchingsectorsfellovertheareaofloadingresistorasmuchaspossible.Theprogramnotonlyreduces9MinimumSwitchingLossesBasedOnVoltage
5、SpaceVectorPulseWidthModulationTechniqueswitchingfrequency,butalsoreducesswitchingcurrent.Soitcouldachievethepurposeoftheminimalswitchinglosses[1].2.Researchmethods2.1ThebasicprinciplesandcharacteristicsofVSVPWM[1-4]VSVPWMhashighutilizationrateofDCvoltage、convenienceofdigitalrealiz
6、ation、clarityofphysicalconceptualandsoon.Itsconcreterealizationisthatlinevoltageorphasevoltagecanbesynthesized.ComparewiththetraditionalSPWM,thispaperisaccordingtophasevoltagesynthesis.Tosimplifytheproblem,asshowninFig.1,Voltagesourceinverteristheobjetofstudy.Theexpectedoutputthree
7、-phasevoltageis（1）Thedefinitionforthesynthesisvoltagevectoris（2）Letustoputequation(1)intoequation(2),thefinalexpressionfortheexpectedoutputvoltagevectoris（3）Whenbipolarmodulation,theinvertercouldhastotaleightkindsofswitchstate.Iftwoswitches:oneupperandonelowerconductatthesametimesu
8、chthattheoutputvoltageis±,
