一种软开关交错式三电平逆变电路的研究

44120101PowerElectronicsVol.44，No.1January，201044120101PowerElectronicsVol.44，No.1January，2010：（GJJ08240）：2009-06-24：（1974-），，，，。1[1]。EMI。。Buck[2-4]、PFCBoost[5-6][7]。。。。。22．11。VQ1VQ2VQ5VQ6VQ3VQ4。4L1～L4L330013：、。PWM。。NPC。2kVA。：：TM464：A：1000-100X201001-0008-03StudyonaSoft-switchingInterleavedThree-levelInverterYUANYi-shengEastChinaJiaotongUniversityNanchang330013ChinaAbstract：Byaddinganinterleavedparallelpowersemiconductorattheupperandlowerlocationinthetraditionalthree-levelinverteraninterleavedthree-levelinverterisrealizedwithinputandoutputdouble-frequencycurrentanditsPWMmethodisproposed.Byinsertingalimiting-currentinductorintheinterleavedpowersemiconductorbranchtheinterleavedpowerswitchescanrealizezero-currentturnonandthereverserecoverycurrentoffreewheelingdiodeisreduced.Thethe-oryofeachoperatingstageiselaborated.Theaffectanddesignofthelimitingcurrentinductorareanalyzed.Usingthesametheoryanothersoft-switchingNPCinverterisdeduced.A2kVAlaboratoryprototypeisproducedandthetestwave-formsverifiythecorrectnessofthetheory.Keywords：inverterinterleavedtechniquezerocurrentturnonsoft-switchingFoundationProject：SupportedbyScienceandTechnologyProjectofJiangxiEducationDepartmentNo.GJJ0824018VD7～VD10。LLf。2．2PWM26SPWM。ururutVQ1VQ2180°urutVQ4VQ3VQ5VQ6。uruturVQ5VQ6180°uturVQ3VQ4VQ1VQ2。2．3LfiLf3。11[t0～t1]t0LfVD8L2VQ3L2iL2。b。t0VQ1uds1VQ1iL1。aUs1abuab=Us1L1L2iL2iL1iL1=Us1t/2LiL2=iL2t0-Us1t/2L。iL1VQ1。iL2t1。22[t1～t2]t1VD8iL2-iL2L1VQ1VQ1。iL1=iLf+iL2。L2VD8。VD8t2。33[t2～t3]t2VD8bc。t3-iL2uds2=Us1-LfUs1/L+Lf-Luo/L+Lf。L垲Lfuds2≈0。44[t3～t4]VQ1iL1iL1=Us1-uot/L+Lf+iL1t3。55[t4～t5]t4VQ1LfL1aVD7LfL1VD7VQ3。iL1=iL1t4-uot/L+LfiL1。66[t5～t6]t5VQ2。uds2uba=Us1L1L2iL2VQ2iL2=Us1t/2LiL1=iL1t5-Us1t/2L。[t0～t1]VQ1VQ2。。3NPCNPC4。L1L2VQ1～VQ4。VQ1VQ21VQ34VQ5VQ71VQ44VQ6VQ81VQ5VQ64VQ3VQ4。4L1～L4。。。VQ1[t0～t4][t0～t3][t3～t4]。c2PWM4NPC3944120101PowerElectronicsVol.44，No.1January，201044120101PowerElectronicsVol.44，No.1January，2010uc=Us1/2t0tt2Us1/2→LfUs1L+Lf+LuoL+Lft2tt3LfUs1L+Lf+LuoL+Lft3tt4→→→→→→→1Lt0～t1。t1。tf5tft1－t0垲1－DmaxTs。5PFC±360V220V2kVA/1.4kW。TMS240F2812DSP。IRG4PC40UDIGBT20kHz50ns。t15250ns。Li=5μHLf=1.5mHCf=6.8μF。5Lf。6aVQ1VQ26bVQ16cVQ2。6bVQ1uds1ids1。VQ2uds2ids1。。6。。。[l]NabaeITakahashiHAkgai.AnewNeutral-Point-ClampedPWMInverter[J].IEEETrans.onIndustrialApplications1981175518-523.[2]YungtaekJangMilanMJovanovicYuriPanov.Multi-PhaseBuckConverterswithExtendedDutyCycle[A].RecordofIEEEAppliedPowerElectronicsConference[C].200638-44.[3].Buck[J].200842678-423.[4]MilanIlicDraganMaksimovic.InterleavedZeroCurrentTransitionBuckConverter[A].20thAppliedPowerElec-tronicsConference[C].20051256-1271.[5]AluisioABentoEdisonRdaSilvaEuzeliCdosSantosJr.ReducingtheInductorSizeandCurrentStressbyInter-leavedBidirectionalBoostRectifiersUsedforPowerFactorCorrection[A].RecordofIEEEAppliedPowerElectronicsConference[C].2006273-279.[6]GangYaoHaiyangHeJianjiangShietal.AZCSPWMSwitchCircuitfortheInterleavedBoostConverters[A].37thIEEEPowerElectronicsSpecialistConference[C].20062478-2481.[7].[J].200640687-89.56VQ1VQ2、垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲垲20106《》20106，2010330（email：[e-mail]），“”。。2010430。10