简介：Abroadbandreflectivepolarizationconverterisproposed.Theunitcellofpolarizationconverteriscomposedofasingle-splitresonantring,adouble-splitresonantring,adielectricsubstrateandametallicground.Thesimulatedresultsshowthatthepolarizationconvertercanconvertx-polarizedwavesintoy-polarizedwavesandobtainabroadbandpolarizationconversionfrom0.5010THzto1.3900THzwiththepolarizationconversionratio(PCR)beyond80%atnormalincidence.Moreover,thesurfacecurrentdistributionsareinvestigatedtoexplainthepolarizationconversionmechanism.Finally,agoodagreementisachievedbetweensimulatedandmeasuredresults.Thepolarizationconvertercanbeappliedinterahertzimaging,communicationandstealthytechnology.

简介：Themethodconsistingofcoldtestandhotsimulatinghasbeenprovedtobereliablefordesigningpermeableele-ments.Thecarbon-magnesiamultiple-tubepermeableele-mentswhichareformedbyisostaticalpressurehavehigherdensity,highheatresistanceandgoodthermoshockresis-tance,Thebrickwork,maintenanceanderosionmeha-nismofpermeableelementswerestudied.Thetehnologyofcombinedblowingwaestablishedbasedonthepeculiari-tiesofsemi-steelrefiningatPanzhihuaIrom&SteelCo.(PZISC).Theservicelifeofpermeableelementsreahed600heats,thatmeansthepermeableelementscanworksynchronitiallywithconverterlining.

简介：TheDCreactorisanimportantpieceofequipmentforrestrainingloopandripplecurrentsintheinternationalthermonuclearexperimentalreactor(ITER)converterpowersupplysystem.Asthereactorisoperatedatasteadystateof27.5kAandneedstowithstandapeakcurrentof175kA,sothedesignoftheDCreactorusedintheITERconverterpowersupplysystemisnecessary.Anewwater-coolingdry-typeair-corereactorisdesignedinthiswork.Thedetailedstructuralparametersarecalculatedbytheoreticalformulas,andthenthestructureisoptimizedbyelectromagneticsimulationwithANSYS.Finally,thermalanddynamicstabilityanalysesareperformedtoverifythetemperatureandstressataratedcurrentof27.5kAandpulsedcurrentof175kA.TheanalysisresultsshowthatthetemperatureandstressmeettherequirementsoftheITERconverterpowersupplysystem.

简介：Inthispaper,wecalculatetheresolutionofaphotorefractiveincoherent-to-coherentopticalconverterontheimageplaneforsmalldiffractionefficiencybytakingintoaccounttheopticalimagingcharacteristicsoftheimaginglens.Forathingrating,weobtainahighresolution,whichiscomparablewiththeexperimentalresults.

简介：AnewFB-ZVT-PWMconverterisproposed.ThenewconverteroperatesatafixedfrequencyandimplementsZVSforpowerdeviceswithoutincreasingvoltageinbothturn-onandturn-offtransient.A80kHz/50WFB-ZVT-PWMboostconverterusingMOSFETsisanalysedtheoretically.

简介：一个新奇optical-spectrum-encoded(OSE)analog-to-digital变换器(模数转换器)在这个字母被建议。简单地例示变换想法，5位的设备结构由Fabry-Perot干涉仪(FPI)组成了被分析并且数字地模仿了。在电镀物品光的FPI的调整电压上的山峰传播波长的依赖和在FPI的事件光波长上的播送功率的依赖被讨论并且利用了实现OSEADC。线性地悦耳的锁模式的激光作为一个电压波长变压器和一个刺绣花样，并且作为一个编码器数组，啁啾的栅栏FPI能被用来获得许多更大的采样率和小点决定。CLC数字TH867+.91

简介：AdesignofthemainAC/DCconvertersystemforITERisdescribedandthecon-figurationofthemainAC/DCconvertersispresented.Toreducethereactivepowerabsorbedfromtheconverterunits,themainAC/DCconvertersaredesignedtobeseries-connectedandworkinasequentialmode.Thestructureoftheregulatoroftheconvertersystemisdescribed.AsimulationmodelwasbuiltupforthePSCAD/EMTDCcode,andthedesignwasvalidatedaccordingly.Harmonicanalysisandreactivepowercalculationoftheconvertersunitsarepresented.Theresultsrevealtheadvantageofsequentialcontrolinreducingreactivepowerandharmonics.

简介：Blackmagic公司推出的支持光纤的MiniConverterOpticalFiber转换器，适用于大型制作单位或播出机构及DSNG卫星转播车，同时也是小型机构的高性价比线路传输方式的优异选择。

简介：Inthispaper,onthebasisofthephase-shiftedcontrolledzero-voltage-switch(ZVS)full-bridgeconverterwithpulsewidthmodulation(PWM),anovelzero-voltageandzero-currentswitch(ZVZCS)PWMconverterusingasimpleauxiliarycircuitwasdesigned.TheZVZCSsoftswitchisachievedbytheresonanceamongtheresistingelectromagneticdeflectioncapacitor,thecapacitorofthesimpleauxiliarynetworkandtheleakageinductoroftransformer.Therearenodissipationdevicesofthesaturationinductorandtheauxiliaryswitchintheconverter,meantimethecapacitoroftheauxiliarycircuitisalsousedtoclampthevoltageoftherectifier,andthereisnoadditionalclampedcircuit.Thereisnobigcirculatingcurrentintheconverter,alltheactiveandpassivedevicesworkontheconditionofthelowcurrentandvoltagestress,andtheproposedconverterhaswideloadrangeandsmalldutyloss.

简介：AkindofarchitectureofTime-to-DigitalConverter(TDC)forUltra-WideBand(UWB)applicationispresented.TheproposedTDCisbasedonpulseshrinking,andimplementedinaFieldProgrammableGateArray(FPGA)device.ThepulseshrinkingisrealizedinaloopcontainingtwoProgrammableDelayLines(PDLs)oratwo-channelPDL.Oneline(channel)delaystherisingedgeandtheotherline(channel)delaysthefallingedgeofacirculatingpulse.DelayresolutionofPDLisconvertedintoadigitaloutputcodeunderknownconditionsofpulsewidth.Thisdelayresolutionmeasurementmechanismisdifferentfromtheconventionaltimeintervalmeasurementmechanismbasedonpulseshrinkingofconversionofunknownpulsewidthintoadigitaloutputcode.Thismechanismautomaticallyavoidstheinfluenceofunwantedpulseshrinkingbyanycircuitelementapartfromthelines.TheachievedrelativeerrorsforfourPDLsarewithin0.80%–1.60%.

简介：考虑到TDFC控制了展示我们建议的频率的当前模式的巴克变换器，Fourier分解为这个系统的分叉分析基于方法，因此TDFC的控制获得的理论范围被决定。另外，力量阶段实验电路被造，控制部分在一个数字控制器被认识到。试验性的结果证明在当前模式的巴克变换器的分叉或混乱能很快被控制进期待的period-1轨道。

简介：Anovel1.55-μmspot-sizeconverterintegratedelectroabsorptionmodulatorwasdesignedwithconventionalphotolithographyandchemicalwetetchingprocess.Aridgedouble-corestructurewasemployedforthemodulator,andaburiedridgedouble-corestructurewasincorporatedforthespot-sizeconverter.Thepassivewaveguidewasopticallycombinedwithalaterallytaperedactivewaveguidetocontrolthemodesize.Thefigureofmeritis4.1667dB/V(/100μm)andthebeamdivergenceanglesinthehorizontalandverticaldirectionswereassmallas11.2°and13.0°,respectively.

简介：AbridgearmprototypeofITERpoloidalfield(PF)convertermoduleshasbeendesignedandfabricated.Non-cophasecounterparallelconnectionischosenasthearmstructureoftheprototype.Amongallfactorsaffectingcurrentsharing,armstructureisthemainone.Duringthedesignofthearmprototype,anovelmethodbasedoninductancematrixesisemployedtoimprovethecurrentsharingofthebridgearm.Thetestresultsontheprototypeshowthatthecurrentsharingperformanceofthearmprototypeismuchbetterthanrelevantdesignrequirement,andthatthematrixmethodisveryeffectivetoanalyzeandsolvethecurrentsharingproblemsofthyristorconverters.

简介：Anewcycle-by-cyclecontrolflybackconverterwithprimarysidedetectionandpeakcurrentmodecontrolisproposedanditsdynamiccharacteristicsareanalyzed.TheflybackconverterisverifiedbytheOrCADsimulator.Themainadvantagesofthisconverterovertheconventionalonearesimplicity,smallsize,rapidregulatingandnosensingcontrolsignalsovertheisolationbarrier.Thecircuitissuitablefordigitalcontrolimplementations.

简介：

简介：为在当前模式的增加变换器的混乱的控制的一个方法被使用一阶的动态反馈控制介绍。反馈部分在系列由一个电阻和一个电容组成。要控制的系统被当作third-ordermodel，然后分离印射模型被使用数据采样方法获得。Byanalysing最大的标准特征值的位置，反馈获得的稳定的范围外面被查明，它的优化也被执行。最后，模拟和实验的结果证实理论分析的正确性和建议工具的有效性。

简介：

简介：Anovelcontrolschemeispresentedbyusingsliding-modecontrolforboostconverteroperatingincontinuousconductionmode(CCM).Althoughthenon-idealswitchingconditionandphysicalconstraintofthecontrolareconsideredonthebaseofequivalentcontrol,theschemeisstillsimple.Bymodifyingthesliding-modcerrorsineachswitchingperiod,thesteady-stateerrorsandchatteringcanbesubstantiallyreduced.Simulationresultsconfirmthetheoreticalanalysisandshowtheimprovementoftheconverter’sstart-upbehaviorandlowsensitivitytoexternalperturbation.

简介：Thispaperpresentsaflexibleandhighspeeddigitalscanconverter(DSC)withtheabilitytohandlehighfrequencyultrasoundimaginginreal-time.Thecharacteristicsinimagingsystemsuchasfocuslengthoftransducer,theswingradiusandsamplinglengthetc.couldbechangedeasilyincompliancewiththeresearcher'sapplicationbasedonthisflexibledigitalscanconverter.Linearinterpolationisemployedtoachievethecoordinatetransformationsalgorithm.Custom-builtsoftwareisprogrammedtopreliminarilyhandlethealgorithmaccordingtodifferentultrasoundimagingapplications.HighperformanceFPGAwillimplementhighspeedinterpolationcalculationbasedonthepreliminarydatawhicharestoredintheDDR2SDRAMfromthesoftware.64bit66MHzPCIisemployedtoaccomplishhighspeeddatatransmission.Experimenthasshownthatmorethan500frameratecouldbeachievedbasedonthishighspeeddigitalscanconverter.ThedesignedflexibleandhighspeeddigitalscanconvertercouldbeusedincurrentFPGAbasedhighfrequencyultrasoundimagingsystem.

简介：三角洲西格马变换器是高速度和分辨率analog-to-digital调节的人之一。它的实现需要低oversampling技术和多小点承兑交单变换器。多小点承兑交单变换器导致的噪音成为败坏的关键因素之一三角洲西格马A/D变换器的signal-to-noise率。有信号统一transfunction的新奇结构，匹配的动态元素(DEM)并且塑造噪音被讨论。方法被调查基于建议结构设计变换器。行为模拟显示结构和设计方法是可行的。