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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:ThedataacquisitionsystemfortheCMSexperimentattheLargeHadronCollider(LHC)willrequirealargeandhighperformanceeventbuildingnetwork.Severalarchitecturesandswithchtechnologiesarecurrentlybeingevaluated.Thispaperdescribesdemonstratorswhichhavebeensetuptostudyasmall-scaleeventbuilderbasedonPCsemulatinghighperformancesourcesandsinksconnectedviaEthernetorMyrinetswitches.Resultsfromongoingstudies,includingmeasurementsonthroughputandscaling,arepresented.
简介:互补feeders的表演,在平行跑,能被在批评地点安装静态的转移开关(STS)显著地改进。当电压sag或一个差错在比较喜欢的feeder上发生时,我们开发STS控制逻辑,它从比较喜欢的feeder把临界负载转移到交替的feeder。一种强迫的交换技术被建议并且实现了关掉比较喜欢的支线船舶的闸流体,因此避免生气电流流动并且最小化转移时间。模拟结果证明强迫的交换技术是为圣操作同样与最近建议的时间延期技术相比有效的更多。二不同feeders,也就是新的交换,比较喜欢的支线船舶,和部门I-10/2,伊斯兰堡电的供应同伴(IESCO)的交替的支线船舶,巴基斯坦,为案例研究被选择了。软件PSCAD/EMTDC职业包裹被用于模拟。
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简介:Atriggerdeviceandatriggeredpseudosparkswitch(TPSS)weredesignedbasedonsurfaceflashovertechnology,inordertomeettherequirementsfrompresentpulsepowertechnol-ogyandpulsecurrenttesttechnologysuchasalonglifetime,reliabilityinawidevoltagerange,ashortdelaytime,aswellassmalldelayjitters.Thetriggerdevicesweremadefromdifferentdielectricmaterials,withtheirpermittivitiesfromtenstothousands.ThetriggercharacteristicsofTPSSwereinvestigated.Theresultsindicatethatthehigh-dielectrictriggerdeviceshowsbetterperformanceandhigheremittedchargeoftheelectronemissionwithinalladjustedparametersincludingthegaspressureandappliedvoltage.Forthedielectricmaterialwithrelativepermittiv-ityε_rof3460,whenthegaspressureis7Pa,thehold-offvoltageofTPSSis28kV,theminimumtriggerswitchvoltagedropsto128V,theminimumdischargingdelaytimeanddelayjitterarelessthan35nsand6ns,respectively,andthereliableoperationcanbereachedwithinaverylargerangeofchargingvoltage,between0.46%and99%ofitsself-breakdownvoltage.
简介:Weexperimentallydemonstratea16×16reconfigurablynonblockingopticalswitchfabricusingaBenesarchitecture.Theswitchfabricconsistsof562×2Mach–Zehnderinterferometerbasedelementaryswitches,witheachintegratedwithapairofwaveguidemicroheaters.Theaverageon-chipinsertionlossis~5.2dBforbothofthe'all-cross'andthe'all-bar'states,withalossvariationof1dBoverallroutingpaths.Thecrosstalkforallswitchingstatesisbetterthan-30dB.Theswitchingtimeoftheswitchelementisabout22μs.Theswitchingfunctionalityisverifiedbytransmissionofa40Gb∕squadraturephase-shiftkeyingopticalsignal.
简介:Weexperimentallydemonstratea4×4nonblockingsiliconthermo-optic(TO)switchfabricconsistingofthreestagesoftunablegeneralizedMach–Zehnderinterferometers.All24routingstatesfornonblockingswitchingarecharacterized.Thedevice’sfootprintis4.6mm×1.0mm.Measurementsshowthattheworstcrosstalkofallswitchingstatesis-7.2dB.Theon-chipinsertionlossisintherangeof3.7–13.1dB.TheaverageTOswitchingpowerconsumptionis104.8mW.
简介:这份报纸处理一个模式III界面的裂缝题目到反飞机应力和在里面飞机电场。分析专注于从不一致的ferroelectric-ferroelastic领域由一个电场切换调节破裂坚韧。电的装载改变不对称的切换地区的尺寸。采用重量功能方法,我们获得韧化为的电子上依赖的开关静止并且变得界面的伪静电干扰分别地裂开。多域答案为杆得非、杆得充分的铁电体composites被导出。数字结果在批评应用压力紧张因素调节的电场上被介绍。研究提供方法由改变电场优化铁电体composites的破裂性质。
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