ANSYS软件用于开关电源电磁兼容优化设计

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1、EMIModelingandCharacterizationoftheRhinoSMPSCarsonBaisdenRangaTallamGarySkibinskiPresentedby:MarkChristini-AnsoftAugust15,2006Copyright©2006RockwellAutomation,Inc.Allrightsreserved.1Outline•Problem–Goals–Procedure•Modeling–Process–Results•Modelingbenefits•ReductionofconductedEMIt

2、echniques•SummaryCopyright©2006RockwellAutomation,Inc.Allrightsreserved.2Problem•Goal:CharacterizeandreduceEMIemissionsfromFlybackSMPS–ModelSMPS–Determinecriticalcomponentsinsystem–Determinenoiseattenuatingtechniques•Procedure–Model:ActivesandPassives(discretecomponentsandinterco

3、nnects)–Usesimulationstofindcriticalpaths–FocusattentiononthesepathstomitigatenoiseCopyright©2006RockwellAutomation,Inc.Allrightsreserved.3ModelingProcess•Modelallpassivecomponentsusingimpedanceanalyzer•Modelactivecomponentsfromdatasheet•CreategeometricmodelinQ3Dandsolve•Createan

4、dsolvetransientmodelinLISNResistorVoltagesSimplorer2SimulatedTotalEMISpectrum1120SimulatedEMI0CISPRA100CISPR)-1BV(slt•PerformFFTinMatlab80Vo-2V)µ60-3Bd(-4VRpise40VNoRn-50510152025303520Time(µsec)0-200.150.3131030Frequency(MHz)Copyright©2006RockwellAutomation,Inc.Allrightsreserved

5、.4FlybackSMPS••LISN–LISN–LLineineimpedanceimpedancestabizationstabizationnnetworketwork••UsedfortestingUsedfortestingCopyright©2006RockwellAutomation,Inc.Allrightsreserved.5PassiveModeling•Modelallpassivecomponentswithimpedanceanalyzer•Tocreatefrequencydependentequivalentnetworkf

6、ordevice2xSMTDO3316P-473CoilcraftInductorImpedance100Measured80Modeled)Bd60e(ud40itgna20M0-202345671010101010109045)eg(d0eashP-45-90234567101010101010Frequency(Hz)Copyright©2006RockwellAutomation,Inc.Allrightsreserved.6ActiveModelingforMosfetSimplorerSimplorerMModelodelDatasheetD

7、atasheetCapacitanceforSTW4N150DatasheetPlot2000CrssCoss1600Coss,MeasuredCiss)1200FpC(800400001020304050V(V)DSCopyright©2006RockwellAutomation,Inc.Allrightsreserved.7ActiveModelingforMosfetSimplorerSimplorerModelModelDatasheetDatasheetOutputCharacteristicsforSTW4N150DatasheetPlot6

8、6V7V58V9V4)(I3ID2100102030V(V)DSCopyrigh