ShuoWang-2-反激变换器传导和辐射电磁干扰的分析和抑制技术.pdf

1、Shuo Wang University of Florida,2025Analysis and Suppression of Conductive and Radiated Electromagnetic Interference for Flyback ConvertersShuo Wang,University of FloridaGainesville,FL 32611(Aug.21th,2025)Note:Please cite our work/papers when you publish or share the related work,it is very importan

2、t to us as it means respect to our contributions Shuo Wang University of Florida,2025Popular Flyback Converter Topologies2PGND12SGNDSFlyback Converter with Synchronous Rectifiers/Diodes231PGNDSGNDSActive Clamped Flyback Converter with Synchronous Rectifiers/DiodesShuo Wang University of Florida,2025

3、Conductive EMI3Conductive EMI:1)Differential Mode(DM)EMI analysis2)DM EMI suppression3)Common mode(CM)EMI analysis4)CM EMI suppressionDM/CM reductionConducted EMIDM/CM modelingEMI noise source&propagation path modelingComponent parasitic modelingNear-field coupling modelingEMI noise source reduction

4、Component and filter optimizationParasitic&coupling mitigationShuo Wang University of Florida,2025Radiated EMIRadiated EMIModelingReductionRadiation mechanismmodelingComponent parasitic modelingNear-field coupling modelingEMI noise source reductionComponent,PCB and filter optimizationCoupling reduct

5、ion,shieldingHF noise source modelingRadiated EMI:1)Radiated EMI Analysis2)Radiated EMI suppression4Shuo Wang University of Florida,2025AC-line DM EMI Filters vs DC-bus DM EMI Filters51 Y.Li,L.Yang,S.Wang,H.Sheng,S.Lakshmikanthan,and L.Jia,Investigation of a DC bus differential mode EMI filter for A

6、C/DC power adapters,in 2018 IEEE Applied Power Electronics Conference and Exposition(APEC),2018,pp.603-610.Shuo Wang University of Florida,2025DM EMI,CM EMI and Line-frequency Currents of Flyback ConvertersEarth Ground125050501 0.1EMI Filter12nd CM noise pathDM pathCM path1st CM noise pathLISNsFlyba