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1、畢業(yè)設(shè)計(jì)（論文）外文翻譯原文題目：DCSwitchingPowerSupplyProtectionTechnologyPrimaryExaminerDonaldJ.YuskoAttneyAgentFirmKinney&LangeAbstractAbstract:TheDCswitchingpowersupplyprotectionsystemprotectionsystemdesignprinciplesmachineprotectio

2、nmeasuresananalysisofswitchingpowersupplyintherangeofprotectedacteristicsitsdesignmethodologyintroducedanumberofpracticalprotectioncircuit.KeywdsKeywds:switchingpowersupplyprotectioncircuitsystemdesign1、IntroductionIntro

3、ductionDCswitchingregulatusedinthepriceofmeexpensivehighpowerswitchingdevicesthecontrolcircuitisalsomecomplexInadditiontheloadswitchingregulatsaregenerallyusedalargenumberofhighlyintegratedelectronicsystemsinstalleddevic

4、es.Transistsintegrateddevicetoleranceelectricitylessheatshocks.SwitchingRegulatstherefeshouldtakeintoaccounttheprotectionofvoltageregulatsloadtheirownsafety.Manydifferenttypesofcircuitprotectionpolarityprotectionintroduc

5、edheretheprogramprotectionovercurrentprotectionovervoltageprotectionundervoltageprotectionovertemperatureprotectioncircuit.Usuallychosentobesomecombinationofprotectionconstitutesacompleteprotectionsystem.2、polaritypolari

6、typrotectionprotectionDCswitchingregulatinputaregenerallynotregulatedDCpowersupply.Operatingerrsaccidentsasaresultofthesituationwilltakeitswrongpolarityswitchingpowersupplywillbedamaged.Polarityprotectionpurposesistomake

7、theswitchingregulatonlywhenthecrectpolarityisnotconnectedtoDCpowersupplyregulattowkat.ConnectingasingledevicecanachievepowerauxiliarypowersupplycircuitthroughcurrentlimitingresistRoftheswitchingregulatinputcapacitC→gemod

8、ulationswitchingregulatcircuit→shtcircuitcurrentlimitingresiststabilityswitchingregulat.Intheswitchingregulatthemachinesjustbecausetheoutputcapacitancegetotheratedoutputvoltagevalueoftheneedfacertainperiodoftime.Duringth

9、istimesamplingtheoutputamplifierwithlowinputvoltagesamplingclosedloopregulationacteristicsofthesystemwillfcetheswitchingofthetransistconductiontimelengthenedsothatswitchingtransistduringthisperiodwilltendtocontinuouscond

10、uctioneasilydamaged.Tothisendtherequirementsofthisparagraphintheboottimetheswitchtoswitchtheoutputmodulationcircuittransistbasedrivesignalofthepulsewidthmodulationcanguaranteetheswitchingtransistbythecutoffswitchesarebec

11、omingmemenmalstatetherefetheprotectionofthesettingupofaboottotieinwiththesoftstart.4、overcurrentovercurrentprotectionprotectionWhentheloadshtcircuitoverloadcontrolcircuitfailureunfeseencircumstancessuchaswouldcausetheflo

12、wofswitchingvoltageregulattransistcurrentistoolargesothatincreasedpowertubesfeverifthereisnoovercurrentprotectiondevicehighpowerswitchingtransistmaybedamaged.Therefetheswitchingregulatintheovercurrentprotectioniscommonly

13、used.Themosteconomicalwayistousesimplefuse.Asaresultoftheheatcapacityofsmalltransistsgeneralfuseprotectioningeneralcannotplayaroleintherapidfusecommonfuse.Thismethodhastheadvantageoftheprotectionofvulnerablebutitneedstos

14、witchtransistinaccdancewithspecificsecurityrequirementsofthewkareatothefusespecifications.Thisdisadvantageisovercurrentprotectionmeasuresbroughtaboutbytheinconvenienceoffrequentreplacementoffuses.Linearvoltageregulatcomm

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