开关电源电磁兼容_EMC_研究

2004425212TelecomPowerTechnologiesApr.25,2004Vol.21No.2:2003212201:(1980-),,,,::100923664(2004)0220016204(EMC),,,,(,610031):,,:;;;:TN86TN712:AElectromagneticCompatibilityStudyofSwitchingModePowerSupplyZHOUChao,LIChun2mao,ZHUFeng,DUPing,SUNXiang2yang(SchoolofElectricEng.,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Themechanismofelectromagneticdisturbanceinswitchingmodepowersupplyisanalyzedandthesuppressingmethodsarepresented.AfewkeypointsofEMCdesignarediscussed.Keywords:switchingmodepowersupply;electromagneticcompatibility;EMI;couplingpath,,,,EMCIEC61000CISPRENFCCGB/T13926EMC,(EMC)1,,(EMI)(EMS)EMI,EMS,:()(),:,:,,,,,,2EMI,EMI,,,EMI:1)EMI,;2),,;3)(PCB),,PCB;4)(HzHz),3(EMI)3.161,,,,,,,,3.1.1,,du/dt,[1]:(1),,,;,,,,,,,,,(2),,,3.1.2,,,,:I=Im(2-43)cos(2t)-415cos(4t)-,Im,I,,;,,PN,,,,,3.1.3du/dtdu/dt,,du/dt,du/dtdu/dt,3.2,3.33.3.1,,,,di/dt,du/dt,,,,,,,,,,,EMI,3.3.2(30MHz),,,,,,,,,,712:(EMC)3.4EMIEMI,EMI,,,,,1[2],,1(a),2(b)14EMI:,,,4.14.1.1,du/dtdu/dtdu/dt,,,EMIEMI,;,,di/dtdu/dtEMI[3],,EMI,,,EMI,224.1.2,F.Lin[4],fc,fc2fc,3fc,EMI,EMIPWM,,EMC33EMI4.1.3EMIEMI,EMI4.1.4,8121/,EMI,,EMI,EMIEMI,[5],EMI,4.1.5,di/dt,RC,,(4)44.2EMI,50Hz400Hz,,,,EMI10kHz150kHz150kHz10MHz10MHz10kHz150kHz,LC150kHz10MHz,,12mH33004700pF,LC10MHzEMIEMIEMI,,EMIEMI,EMIEMI4.3,EIAf2,,,;,,,[6]:1),;2);3),:1),;2);3),5,,,:[1].[J].,2003(4):20223.[2].[D]..:,2002,9.[3]HaroranZhang,AnnettevonJouanne.SuppressingCom2mon2ModeConductedEMIGeneratedbyPWMDriveSystemsUsingaDual2BridgeInverter[C],Proc.ofIEEEAPEC98,1998,101721020.[4]FLin,DYChen,ReductionofPowerSupplyEMIE2missionbySwitchingFrequencyModulation[C],Proc.ofIEEEPESC93,1993,1272133.[5]AlfioConsoli.AnInnovativeEMIReductionDesignTechniqueinPowerConverters[C].IEEETrans.onEMC,1996.[6].[J].,2001(1)(2)(3).912:(EMC)