科技文献中英文翻译Word格式文档下载.docx

科技文献中英文翻译Word格式文档下载.docx

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英文

Withtherapiddevelopmentofelectronictechnology,applicationfieldofelectronicsystemismoreandmoreextensive,electronicequipment,therearemoreandmorepeopleworkwithelectronicequipment,lifeisincreasinglycloserelationship.Anyelectronicequipmentareinseparablefromreliablepowersupplyforpowerrequirements,theymoreandmoreisalsohigh.Electronicequipmentminiaturizedandlowcostinthepoweroflightandthin,smallandefficientfordevelopmentdirection.Thetraditionaltransistorsseriesadjustmentmanostatiscontinuouscontrollinearmanostat.Thistraditionalmanostattechnologymoremature,andtherehasbeenalargenumberofintegratedlinearmanostatmodule,hasthestableperformanceisgood,outputripplevoltagesmall,reliableoperation,etc.Butusuallyneedarebulkyandheavyindustrialfrequencytransformerandbulkandweightarebigfilter.

Inthe1950s,NASAtominiaturization,lightweightasthegoal,forarocketcarryingtheswitchpowerdevelopment.Inalmosthalfacenturyofdevelopmentprocess,switchpowerbecauseofissmallvolume,lightweight,highefficiency,widerange,voltageadvantagesinelectric,control,computer,andmanyotherareasofelectronicequipmenthasbeenwidelyused.Inthe1980s,acomputerismadeupofallofswitchpowersupply,thefirstcompletecomputerpowergeneration.Throughoutthe1990s,switchingpowersupplyinelectronics,electricalequipment,intotherapiddevelopment.Inaddition,largescaleintegratedcircuittechnology,andtherapiddevelopmentofswitchpowersupplywithaqualitativeleap,raisedhighfrequencypowerproductsof,miniaturization,modulartide.

Powerswitchtube,PWMcontrollerandhigh-frequencytransformerisanindispensablepartoftheswitchpowersupply.Thetraditionalswitchpowersupplyisnormallymadebyusinghighfrequencypowerswitchtubedivisionandthepins,suchasusingPWMintegratedcontrollerUC3842+MOSFETisdomesticsmallpowerswitchpowersupply,thedesignmethodofamorepopularity.

Sincethe1970s,emergedinmanyfunctioncompleteintegratedcontrolcircuit,switchpowersupplycircuitincreasinglysimplified,workingfrequencyenhancesunceasingly,improvingefficiency,andforpowerminiaturizationprovidesthebroadprospect.Threeendoff-linepulsewidthmodulationmonolithicintegratedcircuitTOP（ThreeswitchLine）willTerminalOffwithpowerswitchMOSFETPWMcontrolleronepackagetogether,hasbecomethemainstreamofswitchpowerlCdevelopment.AdoptTOPswitchlCdesignswitchpower,canmakethecircuit

simplified,volumefurthernarrowing,costalsoisdecreasedobviousiy.

Monolithicswitchingpowersupplyhasthemonolithicintegrated,theminimalistperipheralcircuit,bestperformanceindex,noworkfrequencytransformercanconstituteasignificantadvantageswitchingpowersupply,etc.AmericanPl（with）companyinPowerinthemid1990sfirstlaunchedthenewhighfrequencyswitchingPowersupplychip,knownasthe"

topswitchPower"

withlowcost,simplecircuit,higherefficiency.Thefirstgenerationofproductslaunchedin1994representedTOP100/200series,thesecondgenerationproductistheTOPSwitch-debutedin1997П.Theaboveproductsonceappearedshowedstrongvitalityandhegreatlysimplifiesthedesignof150Wfollowingswitchingpowersupplyandthedevelopmentofnewproductsforthenewjob,also,highefficiencyandlowcostswitchpowersupplypromotionandpopularizationcreatedgoodcondition,whichcanbewidelyusedininstrumentation,notebookcomputers,mobilephones,TV,VCDandDVD,perturbationVCR,mobilephonebatterychargers,poweramplifierandotherfields,andformvariousminiaturization,density,onpricecancompetewiththelinearmanostatAC/DCpowertransformationmodule.

Switchingpowersupplytointegrateddirectionoffuturedevelopmentwillbethemaintrend,powerdensitywillmoreandmorebig,toprocessrequirementswillincreasinglyhigh.Insemiconductordevicesandmagneticmaterials,nonewbreakthroughtechnologyprogressbeforemajormightfindithardtoachieve,technologyinnovationwillfocusonhowtoimprovetheefficiencyandfocusonreducingweight.Therefore,craftlevelwillbeinthepositionofpowersupplymanufacturinghigherin.Inaddition,theapplicationofdigitalcontrolICisthefuturedirectionofthedevelopmentofaswitchpower.ThistrustinDSPforspeedandanti-interferencetechnologyunceasingenhancement.Asforadvancedcontrolmethod,nowtheindividualfeelshaven'

tseenpracticabilityofthemethodappearsparticularlystrong,perhapswiththepopularityofdigitalcontrol,andtherearesomenewcontroltheoryintoswitchingpowersupply.

（1）Thetechnology:

withhighfrequencyswitchingfrequenciesincrease,switchconvertervolumealsodecrease,powerdensityhasalsobeenboosted,dynamicresponseimproved.SmallpowerDC-DCconverterswitchfrequencywillrisetoMHz.Butastheswitchfrequencyunceasingenhancement,switchcomponentsandpassivecomponentslossincreases,high-frequencyparasiticparametersandhigh-frequencyEMIandsoonthenewissueswillalsobecaused．

（2）Softswitchingtechnologies:

inordertoimprovetheefficiencyofnon-linearityofvarioussoftswitch,commutationtechnicalapplicationandhygiene,representativeofsoftswitchtechnologyispassiveandactivesoftswitchtechnology,mainlyincludingzerovoltageswitch/zerocurrentswitch（ZVS/ZCS）resonance,quasiresonant,zerovoltage/zerocurrentpulsewidthmodulationtechnology（ZVS/ZCS-PWM）andzerovoltagetransition/zerocurrenttransitionpulsewidthmodulation（PWM）ZVT/ZCT-technical,etc.Bymeansofsoftswitchtechnologycaneffectivelyreduceswitchlossandswitchstress,helpconvertertransformationefficiency.

（3）Powerfactorcorrectiontechnology（ICsimplifiesPFC）.AtpresentmainlydividedintoICsimplifiesPFCtechnologypassiveandactiveICsimplifiesPFCtechnologyusingICsimplifiesPFCtechnologytwokindsbig,IGsimplifiesPFCtechnologycanimproveAC-DCchangedeviceinputpowerfactor,reducetheharmonicpollutionofpowergrid.

（4）Modulartechnology.Modulartechnologycanmeettheneedsofthedistributedpowersystem,enhancethesystemreliability.

（5）Lowoutputvoltagetechnology.Withthecontinuousdevelopmentofsemiconductormanufacturingtechnology,microprocessorandportableelectronicdevicesworkmoreandmorelow,thisrequiresfutureDC-DGconvertercanprovidelowoutputvoltagetoadaptmicroprocessorandpowersupplyrequirementofportableelectronicdevices

Peopleinswitchingpowersupplytechnicalfieldsareedgedevelopingrelatedpowerelectronicsdevice,thesideoffrequencyconversiontechnology,developmentofswitchbetweenmutualpromotionpushswitchpowersupplywithmorethantwoyeargrowthtowardlight,digitalsmall,thin,lownoiseandhighreliability,anti-interferencedirection.SwitchingpowersupplycanbedividedintotheAC/DCandDC/DCtwokindsbig,alsohaveAC/ACDC/ACasinverterDC/DCconverterisnowrealizemodular,anddesigntechnologyandproductionprocessathomeandabroad,arematureandstandardization,andhasapprovedbyusers,buttheAC/DCmodular,becauseofitsowncharacteristicsintheprocessofmakingmodular,meetmorecomplextechnologyandcraftmanufactureproblems.Thefollowingtwotypesofswitchpowersupplyrespectivelyonthestructureandpropertiesofthis.

Switchingpowersupplyisthedevelopmentdirectionofhighfrequency,highreliability,lowconsumption,lownoise,anti-jammingandmodular.Becauselightswitchpower,small,thinkeytechniquesarechanged,sohighoverseaseachbigswitchpowersupplymanufactureraredevotedtothedevelopmentofnewhighintelligentsynchronousrectifier,especiallytheimprovementofsecondarydevicesofthedevice,andpowerlossofZnferrite（Mn）material?

Byincreasingscientificandtechnologicalinnovation,toenhanceinhighfrequencyandlargermagneticfluxdensity（Bs）cangethighmagneticundertheminiaturizationof,andcapacitorisakeytechnology.SMTtechnologyapplicationmakesswitchingpowersupplyhasmadeconsiderableprogress,bothsidesinthecircuitboardtoensurethatdecoratecomponentsofswitchpowersupplylight,small,thin.ThehighfrequencyswitchingpowersupplyofthetraditionalPWMmustinnovateswitchtechnology,torealizetheZCSZVS,softswitchtechnologyhasbecomethemainstreamofswitchpowersupplytechnical,andgreatlyimprovetheefficiencyofswitchpower.Forhighreliabilityindex,America'

sswitchpowerproducers,reducebyloweringoperatingcurrentmeasuressuchasjunctiontemperatureofthedevice,inordertoreducestressthereliabilityofproductsmadegreatlyincreased．

Modularityisofthegeneraldevelopmentofswitchpowersupplytrendcanbemodularpowercomponentdistributedpowersystem,canbedesignedtoN+1redundantsystem,andrealizethecapacityexpansionparallel.Accordingtoswitchpowerrunninglargenoisethisonedefect,ifseparatethepursuitofhighfrequencynoisewillincreaseitswiththepartialresonance,andtransformcircuittechnology,highfrequencycanberealizedintheoryandcanreducethenoise,butpartofthepracticalapplicationofresonantconversiontechnologystillhaveatechnicalproblem,sointhisareastillneedtocarryoutalotofwork,inordertomakethetechnologytopractionalutilization.

Powerelectronictechnologyunceasinginnovation,switchpowersupplyindustryhasbroadprospectsfordevelopment.TospeedupthedevelopmentofswitchpowerindustryinChina,wemustwalkspeedoftechnologicalinnovationroad,combinationwithChinesecharacteristicsinthejointdevelopmentpath,for