开关电源毕业论文外文翻译.docx

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1、本科毕邮效曲译（论文）学院名称：电气信息工程学院专业：电气工程与其自动化班级：学号：姓名：指导老师姓名：指导老师职称：-o-pq年六月外文资料(原文)Mode1.ing,Simu1.ation,andReductionofConductedE1.ectroiiagneticInterferenceDuetoaPWMBuckTypeSwitchingPowerSupp1.yIA.FarhadiAbstract:Undesiredgenerationofradiatedorconductedenergyine1.ectrica1.systemsisca1.1.edE1.ectromagneticI

2、nterference(EMI).Highspeedswitchingfrequencyinpowere1.ectronicsconvertersespecia1.1.yinswitchingpowersupp1.iesimprovesefficiencybut1.eadstoEMI.Differentkindofconductedinterference,EMIregu1.ationsandconductedEMImeasurementareintroducedinthispaper.Comp1.iancywithnationa1.orinternationa1.regu1.ationisc

3、a1.1.edE1.ectromagneticCompatibi1.ity(EMC).Powere1.ectronicsystemsproducersmustregardEMC.Mode1.ingandsimu1.ationisthefirststepofEMCeva1.uation.EM1.simu1.ationresu1.tsduetoaPWMBucktypeswiIchingpowersupp1.yarepresentedinthispaper.ToimproveEMC,sometechniquesareintroducedandtheireffectivenessprovedbysim

4、u1.ation.IndexTermsConducted,BMC,EMI,1.ISN,SwitchingSupp1.yI. INTRODUCTIONFASTsemiconductorsmakeitpossib1.etohavehighspeedandhighfrequencyswitchinginpowere1.ectronicsHighspeedswitchingcausesweightandvo1.umereductionofequipment,butsomeunwantedeffectssuchasradiofrequencyinterferenceappeared.Comp1.ianc

5、ewithe1.ectromagneticcompatibi1.ity(EMC)regu1.ationsisnecessaryforproducerstopresenttheirproductstothemarkets.ItisimportanttotakeEMCaspectsa1.readyindesignphase国.Mode1.ingandsimu1.ationisthemosteffectivetoo1.toana1.yzeEMCconsiderationbeforedeve1.opingtheproducts.A1.otofthepreviousstudiesconcernedthe

6、1.owfrequencyana1.ysisofpowere1.ectronicscomponents国.Differenttypesofpowere1.ectronicsconvertersarecapab1.etobeconsideredassourceofEMI.Theycou1.dpropagatetheEMIinbothradiatedandconductedforms.1.ineImpedanceStabi1.izationNetwork(1.ISN)isrequiredformeasurementandca1.cu1.ationofconductedinterference1.e

7、ve1.Interferencespectrumattheoutputof1.ISNisintroducedastheEMCeva1.uationcriterion网.Nationa1.orinternationa1.regu1.ationsarethereferencesfortheeva1.uationofequipmentinpointofviewofEMC团.II. SOURCE,PATOANDVICTIMOFEMIUndesiredvo1.tageorcurrentisca1.1.edinterferenceandtheircauseisca1.1.edinterferencesou

8、rce.Inthispaperahigh-speedswitchingpowersupp1.yisthesourceofinterference.Interferencepropagatedbyradiationinareaaroundofaninterferencesourceorbyconductionthroughcommoncab1.ingorwiringconnections.Inthisstudyconductedemissionisconsideredon1.y.Equipmentsuchascomputers,receivers,amp1.ifiers,industria1.c

9、ontro1.1.ers,etcthatareexposedIointerferencecorruptionareca1.1.edvictims.Thecommonconnectionsofe1.ements,source1inesandcab1.ingprovidepathsforconductednoiseOrinterference.E1.ectromagneticconductedinterferencehastwocomponentsasdifferentia1.modeandCCHnnIOnmode附.A. Differentia1.modeconductedinterferenc

10、eThismodeisre1.atedtothenoisethatisimposedbetweendifferent1.inesofatestcircuitbyanoisesource.Re1.atedcurrentpathisshowninFig.1削Theinterferencesource,pathimpedances,differentia1.modecurrentand1.oadimpedancearea1.soshowninFig.1.B. CommonmodeconductedinterferenceCommonmodenoiseorinterferencecou1.dappea

11、randimposebetweenthe1.ines,cab1.esorconnectionsandcommonground.Any1.eakagecurrentbetween1.oadandcommongroundcou1.dbemode1.edbyinterferencevo1.tagesource.Fig.2demonstratesthecommonmodeinterferencesource,coranonmodecurrentsI,and1,andthere1.atedcurrentpaths*9.Thepowere1.ectronicsconvertersperformasnois

12、esourcebetween1inesofthespp1ynetwork.Inthisstudydifferentia1.modeofconductedinterferenceisparticu1.ar1.yimportantanddiscussionwi11becontinuedconsideringthismodeon1.y.III. E1.ECTROMAGNETICCOMPATIBI1.ITYREGU1.ATIONSApp1.icationofe1.ectrica1.equipmentespecia1.1.ystaticpowere1.ectronicconvertersindiffer

13、entequipmentisincreasingmoreandmore.Asmentionedbefore,powere1.ectronicsconvertersareconsideredasanimportantsourceofe1.ecIroinagneticinterferenceandhavecorruptingeffectsonthee1.ectricnetworks同.High1.eve1.ofpo1.Iu1.ionresu1.tingfromvariousdisturbancesreducesIhequa1.ityofpowerine1.ectricnetworks.Ontheo

14、thersidesomeresidentia1.,comnercia1.andespecia1.1.ymedica1.consumersaresosensitivetopowersystemdisturbancesinc1.udingvo1.tageandfrequencyvariations.Thebestso1.utiontoreducecorruptionandimprovepowerqua1.ityiscomp1.yingnationa1.orinternationa1.EMCregu1.ations.CISPK,IEC,FCCandVDEareamongthemostfamousor

15、ganizationsfromEurope,USAandGermanywhoareresponsib1.efordeterminingandpub1.ishingthemostimportantEMCregu1.ations.IECandVDErequirementand1.imitationsonconductedemissionareshowninFig.3andFig.4区国.Fordifferentgroupsofconsumersdifferentc1.assesofregu1.ationscou1.dbecomp1.ied.C1.assAforcommonconsumersandc

16、1.assBwithmorehard1.imitationsforspecia1.consumersareseparatedinFig.3andFig.4.Frequencyrangeof1imitatiorisdifferentforIECandVDEthatare150kHzupto30MHzand10kHzupto30MHzrespective1.y.Comp1.ianceofregu1.ationsiseva1.uatedbycomparisonofmeasuredorca1.cu1.atedconductedinterference1.eve1.inthemcntioncdfrequencyrangewiththestatedrequirementsinregu1.ations.InunitedEuropeancommunitycomp1.ianceofregu1.ationismandatoryandproductsmusthavecer