開關電源電磁輻射建模與仿真研究.pdf

1、分類號：TM46密級：不保密UDC：621.3學校代碼：11065碩士學位論文開關電源電磁輻射建模與仿真研究李方元指導教師楊艷學科專業(yè)名稱電氣工程論文答辯日期2016年5月28?￡(c)byFoxitSoftwareCompany2004FoxitPDFEditAbstractSwitchingpowersupplymostlywkinhighfrequencystate.Thehighspeedonoffoftheswitchtube

2、cancausetheproblemofstrongelectromagicinterference.Radiationinterferencewillnotonlyreducethewkingabilityofthepowersupplyitselfbutalsoradiatedenergytotheoutsideofthesystem.Radiationtotheoutsideofthesystemcanreducetheenerg

3、yofthesurroundingelectronicequipmentrunningcapacityharmthehealthofthehumanbody.Therefetheresearchontheelectromagicinterferenceofswitchingpowersupplyhasthedoublemeaningoftheypracticalapplication.Theresearchofinterferences

4、ourceistosolvetheproblemofelectromagicinterference.Therefetheradiationinterferenceofpowercircuitisstudiedinthispaper.Aftertheanalyzingtherequirementofelectromagicradiationthemechanismofswitchingpowersupply.Thisarticlesta

5、rtsfromthecircuitbasiccomponents(resistanceinductancecapacitanceapowerfieldeffecttransistdiode)thecomponentsofhighfrequencyequivalentmodeling.Thenwemodeltheswitchingpowersupply.thetimedomainsimulationfrequencydomainanaly

6、sisarecarriedout.InthispapertheprincipleofBoostPFCDualcircuitisanalyzedthereasonoftheelectromagicradiationofthemaincircuitisexpled.Theharmoniccurrentoftheswitchingcircuitisthemainsourceofthepowerconverter.Theparametersmo

7、delsofmaincomponentsofBoostPFCDualarealsogiveninthispaper.Thetimedomainsimulationfrequencydomainanalysisofthemaincircuitarealsogiven.Fromtheresultsoffrequencydomainanalysisitisprovedthatthehighfrequencycomponentofthecurr

8、entoftheswitchingcircuitthehighfrequencycomponentofthedrainvoltageoftheswitchtubearethemainreasonsftheelectromagicradiationofthecircuit.Attheendofthispapertheelectricdipolemodelmagicdipolemodelareusedtosimulatetheelectro

9、magicfieldwiththeMATLABsoftwarethedistributionoftheelectricfieldthemagicfieldofthetwomodelsareanalyzed.Analysisresultsshowthatinthenearfieldmagicfieldintensityofelectricdipoleissmallerthanthemagicdipole’s.Butthedistribut