相当好的开关电源设计资料,EMI滤波器设计的注意事项,EMI滤波器的作用等
浙江大学硕士学位论文
Abstract
Withthedevelopmentofswitchingmodepowersupply,allkindsofpowerelectronicequipmentsarewidelyappliedtoindustrial,commercialandmilitaryfields,buttheproblemoftheelectromagneticinterference(EMDofswitchingmodepowersupplyincreasesseriously.Theelectromagneticenvironmentpollutioncausesharmtoelectricalandelectronicsystem,itisimperativethatweakeninganddefeatingtheEMIofswitchingmodepowersupply.Thepaperintroducestheresearchfieldsandthecurrentresearchresultsoftheelectromagneticinterference,andthensummarizesthedomesticandoverseasresearchstatusofPCBlayoutandEMIfilterdesign.
Inthispaper,themaincontentincludesthefollowingaspects:
Firstly,theinductivecouplingsbetweentheEMIfilterandthemaincircuitareanalyzed,thelayoutofPCBcomponentshowtoinfluencetheelectromagneticinterferenceisstudiedthroughchangingthedistancebetweenthefilterandthemaincircuitandbothrelativeposition.
Secondly,thepaperbuildsupthemodelsofcommon-mode(CM)electromagneticinterferencesuchaSBoostandBuckcircuits.ItalsoanalyzestheshieldingmechanismofthepowergroundonCMEMI.FromtheperspectiveofminishingtheparasiticCMcapacitancedistributedbetweenearthandthecorrespondingdynamiccircuitnode,thepowergroundhowtoinfluenceCMEMIisevaluatedquantitatively.ItprovidestheoreticalguidanceforrestrainingtheCMEMIofswitchingmodepowersupply.
Thirdly,theEMIfiltersimulationplatformisdesigned.TheresultshowsthatthesimulationplatformhaSanimportantmeaningfordesigningtheEMIfilterthroughcomparingthesimulationtothetest.ItCallaSsistengineerstodesigntheEMIfilter.Keywords:Electromagneticinterference;LayoutofPCBcomponents;Designofpowerground;EMIfiltersimulationplatform