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21720017ProceedingsoftheCSEEVol.21No.7Jul.2001n2001Chin.Soc.forElec.Eng.:025828013(2001)0720056205PWM,,(,210016)PWMCONTROLMODESANDTHEIRINFLUENCEONVOLTAGEFLUCTUATIONFORTHEBRUSHLESSDCGENERATORSBASEDONELECTRONICCONVERTERZHOUBo,DOUSen,YANYang2guang(KeyLaboratoryofAeronauticalPowerSystem,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China)ABSTRACT:AnewbrushlessDCgeneratorisintroducedinthispaper,whichiscomposedofthefull2waveboostC2dumpcon2verterandsynchronousmachine.TheoperationprincipleandPWMcontrolstrategiesforthegeneratorareanalyzed.Thein2fluencesofPWMcontrolstrategiesonthevoltagefluctuationareinvestigated.Somemeasuresarepresentedtodecreasethevolt2agefluctuationofthegeneratorsystem,andsimulationandex2perimentshavebeengiventoshowtheireffectivenessofthePWMstrategies.KEYWORDS:brushlesselectricmachines;powerconverter;voltagefluctuation;PWMstrategy;C2dumpconverter:C2dump,PWM,PWM:;;;;:TN86;TM341:A1,,,,:(H44.6.1)(97F52052)[1],,C2dump,[2]C2dumpC2dump,PWM,PWM,2C-dump1,1Fig.1SchematicofthebrushlessDCgenerator,,,,C2dump2(a),,,Vco;,VcoV0C2dumpC2dump[2]:,;;;S,2(a),,[4],S,C2dump,,S,2C2dumpFig.2TopologyoftheC2dumpconverterforthebrushlessDCgenerator3PWM3.1PWM,2(b),IsIo;ViV0,Vi=2e,e;TsDPWMf,T,DsDr,3PWM4PWM:1:A,B,PWM;2:B,;3:B,A,;4:A;13,24,123PWMFig.3SawtoothwaveformsforPWMintheC2dumpconverter(),,C2dumpV0=Dr1-DsVi(1)Is=Dr1-DsI0(2)Vi,V0,,Vco,DrDsDs=1-DrViV0=1-2DreV0(3),IsIo,,,Ds,1-DsDr,,IsIo;,,Ds,1-DsDr,IsIoIsIoCo,IsIoCo,757:PWMC2dump,PWMVco3.2PWM14PWM1PWMCo,VsVr,VTsVTrPWM(1)1-DsDr,3(4(a)):1[0,t1]:Ts,Tr,Co,CoVco;2[t1,t2]:TsTr,Co,CoIo,Vco;3[t2,t3]:Ts,Tr,CoIsIo,IsIo,Vco,PWM,IsIoCo,Co,Co,VC0=1CoDsT(1-Dr)TIodt=(Dr+Ds-1)IofCo(4),1-Ds=Dr2,21,Vco;3,Is=Io,Co,Vco,Vco=0(2)1-DsDrCo3(4(b)):1[0,t1]:Ts,Tr,Vco;2[t1,t2]:TsTr,CoIs,Vco;3[t2,t3]:Ts,Tr,CoIsIo,IsIo,VcoCo,CoVC0=1Co(1-Dr)TDsTIsdt=(1-Dr-Ds)DrIofCo(1-Ds)(5)3.3PWM2(1)1-DsDrDsDr,TsTr(5(a)):1[0,t1]:CoIs,,Vco;2[t1,t2]:Co,Vco;3[t2,t3]:Co,Io,VcoCoVC0=1CoT(1-Dr)TIodt=DrIofCo(6)DsDr,TrTs,CoVC0=1CoT(1-Ds)TIodt=DsIofCo(7)4PWM1CoFig.4WaveformsforcontrolsignalandCovoltageinPWMmode15PWM2CoFig.5WaveformsforcontrolsignalandCovoltageinPWMmode2(2)1-DsDrIsIoDr0.5,DsDr,5(b)1[0,t1]:TsTr,Vco;2[t1,t2]:Ts,Tr,CoIsIo,Vco;3[t2,t3]:TsTr,VcoCoVCo=1Co(1-Dr)T0Isdt=(1-Dr)DrIofCo(1-Ds)(8)85213.4[3]Lrir=1LrDrT0(Vco-Vo)dt=VcoLrfDr(1-Dr)(9),V0Vo=1CdT/20ir4dt=ir8fCd=VcoDr(1-Dr)8f2CdLr(10)Cd;LrV0Vco,,PWM,,,4:Ce=0.0387V/rmin-1,f=20kHz,V0=200V,I0=5A,Co=Cd=100F,Lr=1.5mH,Vco=300V68C2dump6V1V2PWM12Ds(),126PWMFig.6ComparisonforC0voltagefluctuationbetweenPWMmode1andmode278n=3000rmin-1Dr=V0/VCO=0.667,Ds(3),Ds=0.2261-DsDr,2Vco14578,,Vco,,,,,7,1Co0.67V0.1V;21.6V0.17V8,1Co1.6V0.35V;22.4V0.6V,12,1(3)7(-Co,-)Fig.7SimulationwaveformsforvoltagefluctuationindifferentPWMcontrolmode(topline-VCO,bottomline-VO)5(1)C2dump,;(2)PWM(PWM957:PWM1),8Fig.8ExperimentalwaveformsforvoltagefluctuationindifferentPWMcontrolmode:[1],(YanYang2guang,etal).(Powersystemofaeronautics&astronautics)[M].:(Beijing:AeronauticalIndustryPress),1995.[2]KrishnanR,LeeS.PMbrushlessDCmotordrivewithanewpower2convertertopology[J].IEEETransactiononIndustryAp2plications,1997,33(4):9732982.[3](DingDao2hong).(Powerelectronics)[M].:(Beijing:AeronauticalIndustryPress),1995.[4],(Zhoubo,etal).C2dump(Theoryanalysesandsimulationstudyonthecharacteristicsofanewstarter/generatorbasedonac2dumpBi2directionalconverter)[J].(ProceedingsontheCSEE),2000,20(12):33237.:2000203203;:2000205224:(1961),,,,,()(55continuedfrompage55),,1150[4],,,28058105,,,;,,,:[1](WangBuxuan).()(Heat&masstransferofengineering(part)[M].:(Bei2jing:SciencePublishingHouse),1998.[2],,(FanJing,JiaHongxiang,ChenTingkuan).(Temperaturesolutionofmembrane2watertube)[J].(ThermalPowerGenera2tion),1993,(3):10217.[3],(LiuCunfang,ZhangMengzhu).(Mathmaticalmodelfortemperaturecomputationoffluegasradiationtube)[J].(JournalofEngineeringforThermalEnergyandPower),1996,11(1):45248.[4],(HuangLiangyu,FanQuangui).W(Researchofheattransfer&slag2gingcharacteristicsinW2flamefurnace)[J].(PowerEngineering),1992,12(4):24227.:2001201205;:2001203206:(19632),,,,;(19632),,,;(19632),,,,()0621