ShuoWang-1-电力电子系统由 PCB 接地布线导致的高频电磁辐射的分析与抑制.pdf

1、Shuo Wang University of Florida,2025Analysis and Suppression of Radiated EMI Due to PCB Ground in Power 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 important to us as it means respe

2、ct to our contributions Shuo Wang University of Florida,2025PCB Grounding in Power Electronics2PE 1PE 2Control+-PE 1PE 2Control+-Z1Z2Z3Z1Z2Z3I1I2I3I1I2I3VG1VG2VG3VG1VG2VG3VG1=(I1+I2+I3)Z1VG2=(I1+I2+I3)Z1+(I2+I3)Z2VG3=(I1+I2+I3)Z1+(I2+I3)Z2+I3Z31.Common Ground Impedance Coupling2.DM power currents tr

3、ansferred to common mode(CM)voltagesVG1=I1Z1VG2=I2Z2VG3=I3Z3Separate Single-point GroundingNo common ground impedance coupling(may still have mutual couplings)Shared Single-point GroundingVDCVDCShuo Wang University of Florida,2025Outlines1.PCB Ground layout of multi-stage EMI filters2.Radiated EMI d

4、ue to PCB ground layouts in non-isolated power converters3.Radiated EMI due to PCB ground layouts in isolated power converters4.Radiated EMI due to PCB ground layouts and differential mode EMI noise3Shuo Wang University of Florida,2025PCB Ground Layout of Multi-stage EMI Filters1 S.Wang,Y.Y.Maillet,

5、F.Wang,R.Lai,F.Luo and D.Boroyevich,Parasitic Effects of Grounding Paths on Common-Mode EMI Filters Performance in Power Electronics Systems,in IEEE Transactions on Industrial Electronics,vol.57,no.9,pp.3050-3059,Sept.2010.4Shuo Wang University of Florida,2025PCB Ground Layout of Muti-stage EMI Filt

6、ers5C1C2C3LCM2+LDM22x CCM1LCM12x LDM12x CCM2LPPower ElectronicsCircuitLISNsLP:grounding path inductance2x CCM32xCCM12xCCM2LCM12x(LCM2+LDM2)2xLDM1C1C2C3Ground40dB/dec21=CMCMIIICM1ICM2VLPICM1s voltage drop VLP on LP increases CM EMI on the input side.20304050607080901001101201.0E+051.0E+061.0E+07Frequ