PWM逆变开关电源外文翻译

外文翻译1SwitchingPowerSupplySwitchingpowersupplyworkinhighfrequency,highpulsestate,areanalogcircuitsinaratherspecialkind.Clothboardstofollowtheprincipleofhigh-frequencycircuitwiring.Pulsevoltageconnectionasshortaspossible,includinginputswitchconnectedtothetransformer,outputtransformertotherectifiertubecable.Pulsecurrentloopassmallaspossiblesuchastheinputfiltercapacitorisreturnedtothetransformertotheswitchcapacitornegative.Someout-endedoutputtransformersaretheoutputrectifiertotheoutputcapacitorbacktotransformercircuitXcapacitorascloseaspossibletotheinputswitchingpowersupply,inputlinesshouldbeavoidedinparallelwithothercircuits,shouldbeavoided.YcapacitorshouldbeplacedinthechassisgroundterminalorFGconnectors.Atotaloftouchinductionandtransformertomaintainacertaindistanceinordertoavoidmagneticcoupling.Suchaspoorhandlingoffeelinginbetweeninductorandtransformerplusashield,overanumberofEMCperformanceforpowersupplytothegreaterimpact.Generaltheoutputcapacitorcanbeusedtheothertwoacloserectifieroutputterminalshouldbecloseto,canaffectthepowersupplyoutputrippleindex,twosmallcapacitorinparallelresultsshouldbebetterthanusingalargecapacitor.Heatingdevicestomaintainacertaindistance,andelectrolyticcapacitorstoextendmachinelife,electrolyticcapacitorsistheswitchingpowersupplybottlenecklife,suchastransformers,powercontrol,highpowerresistorsandelectrolytictomaintainthedistancerequiredbetweentheelectrolyteleavingspaceforheatdissipation,conditionspermitting,maybeplacedintheinlet.Controlparttopayattentionto:Weaksignalhighimpedancecircuitconnectedtosamplethefeedbackloopasshortasintheprocessingasfaraspossibleavoidinterference,thecurrentsamplingsignalcircuits,inparticularthecurrentcontrol外文翻译2circuit,easytodealwithsomeunexpectedbadTheaccident,whichhadsomeskill,nowto3843thecircuitexampleshowninFigure(1)Figure1betterthanYuFigure2,Figure2ZaifulltimebyobservingthecurrentwaveformoscilloscopeMingxiansuperimposedspikes,YouyuganraolimitedflowratiodesignZhiDianlow,Figure1thereisnosuchphenomenon,thereareswitchdrivesignalcircuit,switchresistanceshouldbeclosetotheswitchdrivercanswitchtheworktoimprovethereliabilityofthisandthehighDCimpedancevoltagepowerMOSFETdrivercharacteristics.Alignmentofcurrentdensity:nowthemajorityofelectroniccircuitboardusinginsulatedcopperconstitutetied.CommonPCBcopperthicknessof35μm,thealignmentvaluecanbeobtainedinaccordancewith1A/mmexperiencethevalueofcurrentdensity,thespecificcalculationscanbefoundintextbooks.Toensurethealignmentprinciplesofmechanicalstrengthshouldbegreaterthanorequaltothewidthof0.3mm(othernon-powersupplycircuitboardmaybesmallerminimumlinewidth).PCBcopperthicknessof70μmisalsocommoninswitchingpowersupply,thenthecurrentdensitycanbehigher.Addthat,nowChangyongcircuitboarddesigntooldesignsoftwaregenerallyitemssuchaslinewidth,linespacing,holesizeandsodryplateGuoJinXingparameterscanbeset.Inthedesignofcircuitboards,designsoftwareautomaticallyinaccordancewiththespecifications,cansavetime,reducesomeoftheworkloadandreducetheerrorrate.Generallyhigheronthereliabilityoflinesorlinedensitywiringcanbeuseddoublepanel.Characterizedbymoderatecost,highreliability,tomeetmostapplications.Theranksofsomeofthepowermoduleproductsarealsousedplywood,mainlytofacilitateintegrationofpowerdevicessuchastransformerinductancetooptimizewiring,coolingandotherpowertube.Goodconsistencywiththecraftbeautiful,transformercoolinggoodadvantage,butitsdisadvantageishighcost,poorflexibility,onlysuitableforindustrialmassproduction.外文翻译3Single-sided,themarketcirculationofalmostuniversalswitchingpowersupplyusingsingle-sidedcircuitboard,whichhastheadvantageoflowercostsinthedesignandproductiontechnologyarealsotakensomemeasurestoensureitsperformance.SinglePCBdesigntodaytotalkaboutsomeexperience,asasinglepanelwithlowcost,easy-to-manufacturefeatures,theswitchingpowersupplycircuithasbeenwidelyused,becauseofitssidetiedonlycopper,thedevice'selectricalconnections,mechanicalfixationshouldrelyonthecopperlayer,theprocessingmustbecareful.Toensuregoodperformanceofthemechanicalstructurewelding,single-sidedpadshouldbeslightlylargertoensurethatthecopperandsubstratetiedgoodfocus,andthuswillnotbeshockedwhenthecopperstrip,brokenoff.Generalweldingringwidthshouldbegreaterthan0.3mm.Paddiametershouldbeslightlylargerthanthediameterofthedevicepins,butnottoolarge,toensurepinandpadbythesolderconnectionbetweentheshortestdistance,plateholesizeshouldnothinderthenormalconditionsforthedegreeofinvestigation,thepaddiameterisgenerallygreaterthanpindiameter0.1-0.2mm.Multi-pindevicetoensureasmoothinvestigationdocumentscanalsobelarger.Electricalconnectionshouldbeaswideaspossible,inprinciple,shouldbelargerthanthewidthofpaddiameter,specialcircumstancesshouldbeconnectedinlinewiththeneedtowidentheintersectionpad(commonlyknownasGenerationtears),toavoidbreakingcertainconditions,lineandpad.Principleofminimumlinewidthshouldbegreaterthan0.5mm.Single-boardcomponentstobeclosetothecircuitboard.Needoverheadcoolingdevicetodeviceandcircuitboardbetweenthepinspluscasing,canplayasupportingdeviceandincreasethedualrol