Unit3ElectronicSystemComponentsLesson7SwitchingPowerSupply《電子信息工程專業英語教程（第6版）》任治剛編著電子工業出版社

3/6/20251《電子信息工程專業英語教程》Lesson7SwitchingPowerSupplyBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques3/6/20252《電子信息工程專業英語教程》TerminologyDominoeffectBackgrounds3/6/20253《電子信息工程專業英語教程》Terminology3/6/20254《電子信息工程專業英語教程》Dominoeffect骨牌效應Acumulativeeffectproducedwhenoneeventsetsoffachainofsimilarevents:由一件事引發一系列相似事件的累積效應：thedominoeffectofincreasingthespeedlimitinoneofseveralcontiguousstates.幾個毗鄰州中的一個州提高汽車速度極限而引起的骨牌效應3/6/20255《電子信息工程專業英語教程》TexttourOutlineLinearversusSwitchingPowerSuppliesBasicConvertersForward-ModeConverterFundamentalsBoost-modeConverterFundamentals3/6/20256《電子信息工程專業英語教程》Thelinearregulator

Itoperatesby…only30to50percentefficientuneconomicalabove10wattsforsmallapplicationsSwitchingregulator

operatesthepowerdevicesinthefull-onandcutoffstatesefficienciesofbetween70to90percentanattractivechoiceforoutputpowersgreaterthan10wattsorwheremultipleoutputsaredesired

Linearvs.SwitchingPowerSupplies3/6/20257《電子信息工程專業英語教程》Forward-ModeConverterOperationBasicConverters

Forward-ModeConverterFundamentals3/6/20258《電子信息工程專業英語教程》Forward-ModeConverterOperationBasicConverters

Forward-ModeConverterFundamentals3/6/20259《電子信息工程專業英語教程》SchematicofaBoostConverterBasicConverters

Boost-modeConverterFundamentals3/6/202510《電子信息工程專業英語教程》WaveformsforaBoostConverterBasicConverters

Boost-modeConverterFundamentals3/6/202511《電子信息工程專業英語教程》Vocabularyload,cutoff,flux,barrier,effect,conditionStructureReading/writingtechniquesLanguageinuse3/6/202512《電子信息工程專業英語教程》Vocabulary3/6/202513《電子信息工程專業英語教程》LoadindictionaryAweightormassthatissupported:

負重Theoverallforcetowhichastructureissubjectedinsupportingaweightormassorinresistingexternallyappliedforces.

負載量Somethingthatiscarried,asbyavehicle,aperson,orananimal:

裝載物Thequantitythatisorcanbecarriedatonetime.

裝載量Theshareofworkallocatedtoorrequiredofaperson,amachine,agroup,oranorganization.

工作負荷量3/6/202514《電子信息工程專業英語教程》LoadindictionaryThedemandforservicesorperformancemadeonamachineorsystem.

負荷Theamountofmaterialthatcanbeinsertedintoadeviceormachineatonetime:

裝填量Amentalweightorburden:

精神負擔Aresponsibilityregardedasoppressive.

負擔Thepoweroutputofageneratororpowerplant.

發電量3/6/202515《電子信息工程專業英語教程》LoadintextHistorically,thelinearregulatorwastheprimarymethodofcreatingaregulatedoutputvoltage.Itoperatesbyreducingahigherinputvoltagedowntotheloweroutputvoltagebylinearlycontrollingtheconductivityofaseriespasspowerdeviceinresponsetochangesinitsload.Thisresultsinalargevoltagebeingplacedacrossthepassunitwiththeloadcurrentflowingthroughit.在歷史上，線性穩壓器曾是產生穩壓輸出電壓的主要方法。通過對級聯功率通過器件導電性線性控制以響應負載變化，線性穩壓器將輸入高電壓降為輸出低電壓。這種方法導致在負載電流流經的通過單元兩端出現一個大電壓。3/6/202516《電子信息工程專業英語教程》Loadinuse

admissibleload容許載重capacitiveload電容性負載circuitload電路負荷,線路負荷inductiveload電感負載ohmicload電阻負載outputload輸出負載safeload安全載荷unmatchedload不匹配負載3/6/202517《電子信息工程專業英語教程》CutoffindictionaryAdesignatedlimitorpointoftermination.

截止期Ashortcutorbypass.

近路，捷徑Theactoraninstanceofcuttingoff:

切斷Designatingalimitorpointoftermination:

截止的Thepointofdegradation,duetoattenuationordistortion,atwhichasignalbecomesunusable.

截止點3/6/202518《電子信息工程專業英語教程》CutoffintextTheswitchingregulatoroperatesthepowerdevicesinthefull-onandcutoff

states.Thisthenresultsineitherlargecurrentsbeingpassedthroughthepowerdeviceswithalow“on’’voltageornocurrentflowingwithhighvoltageacrossthedevice.開關電源中的功率器件工作在全開和截斷狀態。這樣，要么在大電流流經功率器件時，導通電壓很低；要么在大電壓時，沒有電流通過器件。

3/6/202519《電子信息工程專業英語教程》Cutoffinuse

current-gaincutoff電流增益截止grid-currentcutoff柵流截止grid-voltagecutoff柵壓截止3/6/202520《電子信息工程專業英語教程》FluxindictionaryAfloworflowing.流動Acontinuedflow;aflood.洪流Thelinesofforceofamagneticfield.磁力線Constantorfrequentchange;fluctuation.變遷；波動：Asubstancethataids,induces,orotherwiseactivelyparticipatesinfusingorflowing熔劑Asubstanceappliedtoasurfacetobejoinedbywelding,soldering,orbrazingtofacilitatetheflowingofsolderandpreventformationofoxides.焊劑3/6/202521《電子信息工程專業英語教程》FluxintextDuringthe“on”period,energyisbeingstoredwithinthecorematerialoftheinductorintheformofflux.Thereissufficientenergystoredtocarrytherequirementsoftheloadduringthenextoffperiod.在“接通”周期，能量以磁通的形式存儲在電感的鐵芯材料中。存儲的能量足以滿足負載在下一個“斷開”周期的需求。3/6/202522《電子信息工程專業英語教程》Fluxinuse

acidicflux酸性熔(焊)劑batteryflux蓄電池流出量coreflux鐵心通量magneticflux磁通量non-oxygenflux無氧焊劑rosinflux焊劑scalarflux標量通量short-circuitflux短路磁通,短路通量3/6/202523《電子信息工程專業英語教程》BarrierindictionaryAstructure,suchasafence,builttobarpassage.

柵欄，擋板，壁壘，關卡Somethingimmaterialthatobstructsorimpedes:

妨礙Aboundaryorlimit.

界線或限制Somethingthatseparatesorholdsapart.

隔離物3/6/202524《電子信息工程專業英語教程》BarrierintextNon-isolatedswitchingpowersuppliesaretypicallyusedforboard-levelregulationwhereadielectricbarrierisprovidedelsewherewithinthesystem.非隔離開關電源的典型應用為具備絕緣隔板的系統提供板級電壓調理。3/6/202525《電子信息工程專業英語教程》Barrierinuse

airbarrier氣密層;內襯層collectorbarrier集電極勢壘contact(potential)barrier接觸勢壘customsbarrier關稅壁壘emitterbarrier發射極勢壘firebarriers防火間隔languagebarrier語言障礙sonicbarrier音障,聲壘waterbarrier防水層3/6/202526《電子信息工程專業英語教程》EffectindictionarySomethingbroughtaboutbyacauseoranagent;aresult.結果Thepowertoproduceanoutcomeorachievearesult;influence:影響Ascientificlaw,hypothesis,orphenomenon:效應Advantage;avail:利益；效益：Theconditionofbeinginfullforceorexecution:生效,實施Somethingthatproducesaspecificimpressionorsupportsageneraldesignorintention:感受，效果Aparticularimpression:特殊印象：Productionofadesiredimpression:印象Thebasicorgeneralmeaning;import:主旨；要點：3/6/202527《電子信息工程專業英語教程》EffectintextThecompaniesbuildingtheirownpowersystemsareleaningtowardtransformerisolationinasmanypowersuppliesaspossiblesinceitpreventsadominoeffectduringfailureconditions

制造自己系統電源的公司傾向于在盡可能多的電源中采用變壓器隔離，因為這種隔離避免了故障出現時將產生的連鎖反應。3/6/202528《電子信息工程專業英語教程》Effectinuse

effectconsequenceresultoutcome

Aneffectisproducedbytheactionofanagentoracauseandfollowsitintime:Aconsequencealsofollowsacauseandistraceabletoit,buttherelationshipbetweenthemislesssharplydefinableAresultisaneffect,orthelastinaseriesofeffects,thatisviewedastheendproductoftheoperationofthecause:Anoutcomeisaresultbutmorestronglythanresultimpliesfinalityandmaysuggesttheoperationofacauseoverarelativelylongperiod:3/6/202529《電子信息工程專業英語教程》ConditionindictionaryAmodeorstateofbeing:

狀態或狀況：Astateofreadinessorphysicalfitness.

生理狀況Adiseaseorphysicalailment:

疾病或身體不適Socialposition;rank.

社會地位；身份Onethatisindispensabletotheappe