简介：这篇论文论述inverter的调查为一个永久磁铁的差错容忍的操作同步马达(PMSM)在各种各样的inverter差错下面的直接转矩控制(DTC)系统。有缺点的标准6开关inverter的表演驾驶PMSMDTC系统被分析。为了避免损失或甚至灾难，由inverter差错引起了，有差错容忍的能力的修改拓扑学的inverter被介绍，它作为3阶段4开关inverter被重新设置。当模特儿4开关inverter然后被分析；与一个唯一的非线性的垂直流动观察员一起的新奇DTC策略；反馈赔偿计划为获得一个连续、没有骚乱的驱动器系统被建议。模拟；试验性的结果证明差错容忍的PMSMDTC系统能稳定地操作的建议inverter；连续地与可接受的静电干扰；相当好的动态性能。

简介：Thispaperpresentsauniquenoveldesignofthephase-shiftedcascadehighvoltageinverter.Thehighvoltageinverterutilizesfewerpowerswitchesandsuppliesabalanceload.TheusageofphaseshifttransformerandphaseshiftingSPWMensuresthatinputandoutputharmonicwavecontentislowandoutputvoltagechange(du/dt)hasalowrate,meetingalltherequirementsofthepowerauthorities.Themostout-standingfeatureistheenergysavingwithveryfastcostrecovery.

简介：Basedonmulti-module-cascadedinvertertopology,thisstudypresentedauniversalmultilevelinverterhybridtopologyandunifiedtheresearchesonmultilevelinvertertopology.Accordingtothefreedomofthisuniversaltopology,severalnewhybridtopologieswereconstructed.Also,basedonconventionalmodulationstrategies-multi-carrierSPWM(SinusoidalPulseWidthModulation),hybridmodulationstrategieswereintroducedcorrespondingtohybridtopologies,andamultilevelSVPWM(SpaceVectorPulseWidthModulation)techniquebasedonphase-shiftedtheorywasnaturallyproduced.Simulationandexperimentresultsprovethathybridtopologiesandcorrespondingmodulationstrategiesarevalid,whichlayafoundationforpracticalapplicationofhybridmultilevelinvertertopologies.

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简介：ThesoftswitchingareweldinginverterreducesswitchinglossesandimprovesoperatingenvitonmentofdevicesbyusingZero-Voltage-Transition(ZVT)technique.Step-by-stepanalysisofeachtimingintervalandtheassociatingvoltageandcurrentwaveformsareincludedfortheFull-BridgeZero-Voltage-SwitchedPWMcomerter,Numerousdesignequationssupportingthephase-shiftedsoftswitchingtechniquearehighlighte.

简介：Anovelrepetitivecontrolstrategyfortheoutputwaveformofsingle-phaseCVCFinvertersispresented.Inthisscheme,theinversetransferfunctionofinverterisusedasacompensatortoobtainstableandsatisfyharmonicrejection.Besides,PDcontrollerisadoptedtoimprovetransientperformance.Simulationandexperimentalresults,whicharegottenfromaDSP-based400Hz,5.5KWinverter,indicatethattheproposedcontrolschemecanachievenotonlylowTHDduringsteady-stateoperationbutalsofasttransientresponseduringloadstepchange.

简介：Atypeofnovelinverterpowersupplysystemforhigh-powertwin-wirepulsedgasmetalarcwelding(GMAW)ispresentedmainlyfordealingwiththedisadvantagesoftheconventionalpowersupplyfortwin-wirepulsedGMAWofwhichtheoutputpowerisgenerallydifficulttoincreaseduetolimitationsofthepowerofsemiconductorsandthepowerdensityofmagneticdevices.Inthepowersuppliesforthemasterandslavearcs,thedigitalsignalprocessor(DSP)TMS320F28335isusedtoformtheDSP-basedsynergiccontrolsystemforparallelhigh-powerpulsedGMAW,whichachieveshigh-poweroutputoftwoparallelinverterscontrolledbyasingleDSP;master-slavecommunicationisachievedbyusingecontrollerareanetwork(eCAN)moduleofDSP,thusrealizinganti-phasepulseoutputofhigh-powertwin-wirepulsedGMAWandreducingtheinterferencebetweentwinarcs.Theexperimentresultsdemonstratethatthedesignedinverterpowersupplysystemforhigh-powertwin-wirepulsedGMAWcanbringabouthigh-powerefficiencyofwelding,stableweldingprocessandproperformationofwelds.

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简介：Asimulationmodelisintroducedaboutthenon-linearityprocessofshort-circuitingtransferinCO2arcweldingfordisplayingtheinteractionbetweentheinverterpowersourceandweldingarcunderwaveformcontrol.Inthesimulationmodel,thefeedbacksignalsofcurrentandvoltagearetakenrespectivelyatthedifferentphaseinashortcircuitperiodictimeandappliedtothePWM(pulsewidthmodulation)moduleinamodelofinverterpowersourcetocontroltheoutputofpowersource.ThesimulationoperationaboutthedynamicprocessofCO2short-circuitingtransferweldingisimplementedonthefoundedsimulationmodelwithapeakarccurrentof400Aandapeakvoltageof35V,producingthedynamicarcwaveformswhichcanembodytheeffectofinverterharmonicwave.Thesimulatingwaveformsareclosetothatofweldingexperiments.

简介：Adigitalcontrolofpulsedgasmetalarcweldinginverterwasproposed.AcontrolsystemconsistingofanaloguepartswasreplacedwithanewdigitalcontrolimplementedinaTMS320LF2407ADSPchip.Thedesignandconstructionalfeaturesofthewholedigitalcontrolwerepresented.TheresourcesoftheDSPchipwereefficientlyutilizedandthecircuitsareveryconcise,whichcanenhancethestabilityandreliabilityofweldinginverter.Experimentalresultsdemonstratethatthedevelopeddigitalcontrolhastheabilitytoaccomplishtheexcellentpulsedgasmetalarcweldingprocessandthemeritsofthedevelopeddigitalcontrolarestableweldingprocess,littlespatterandperfectweldappearance.

简介：活跃力量过滤器(APF)基于电压来源inverter(VSI)是为处理力量质量问题的重要措施之一。算术地，APF模型尽最大努力格子是典型的非线性的。被动的想法是一个强大的工具学习如此的一个非线性的系统的稳定。在这篇论文，四腿的APF的一个州空间的模型被导出，基于哪个为当前的追踪的一个新H无穷控制器从被动观点被建议。它能完成asymptotic不仅在L_2获得的意义追踪，而且骚乱变细。随后，保证theboundedness的一个足够的条件和DC电压的需要的平均数也被给。这个直接条件与电的电路的平衡力量的法律一致。在PSCADplatform上执行的模拟验证新途径的有效性。

简介：Accordingtoperformanceanalysisofathree-phasegrid-connectedinvertermathematicalmodelofadirectly-drivenwindturbinewithapermanentmagnetsynchronousgenerator(D-PMSG)underunbalancednetworkvoltageconditions,adualcurrent-loopcontrolstrategy(DCC)orientedonpositivevoltageandnegativecurrentisproposedtoinhibittheDCvoltagefluctuation.Meanwhile,anotchfilterisintroducedintotheconventionalcontrolstrategyofaphase-lockedlooptocompletethelowvoltageridethrough(LVRT)abilityofthewindgenerator.A1.5-MWD-PMSGwithaback-to-backIGBTfrequencyconverterwassimulatedinthePSCAD/EMTDCenvironment,andsimulationresultsshowedthat:themaximumwindpowertrackingwasachievedinthissystemandtheproposedDCCstrategycouldsuccessfullyinhibittherisingagingofDCvoltageandenhancetheride-throughcapabilityofD-PMSGwindgenerationsystemunderunbalancednetworkvoltageconditions.