ANSYS软件用于开关电源电磁兼容优化设计.pdf

EMI Modeling and Characterization of the Rhino SMPS Carson Baisden Ranga Tallam Gary Skibinski Presented by: Mark Christini - Ansoft Au ust 15 2006 Copyright © 2006 Rockwell Automation, Inc. All rights reserved. Outline • Problem – Goals – Procedure • Modeling – Process – Results • Modeling benefits • Reduction of conducted EMI techniques • Summary Copyright © 2006 Rockwell Automation, Inc. All rights reserved. 2 Problem • Goal: Characterize and reduce EMI emissions from Flyback SMPS – Model SMPS – Determine critical components in system – Determine noise attenuating techniques • Procedure – Model: Actives and Passives (discrete components and interconnects) – Use simulations to find critical paths – Focus attention on these paths to mitigate noise Copyright © 2006 Rockwell Automation, Inc. All rights reserved. 3 Modeling Process • Model all passive components using impedance analyzer • Model active components from datasheet • Create geometric model in Q3D and solve • Create and solve transient model in LISN Resistor Voltages Simplorer