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Article Dans Une Revue IEEE Transactions on Electromagnetic Compatibility Année : 2013

N-Conductor Passive Circuit Modeling for Power Converter Current Prediction and EMI Aspect

Roberto Mrad
  • Fonction : Auteur
Florent Morel
  • Fonction : Auteur
Christian Vollaire
Philippe Lombard
  • Fonction : Auteur
Angelo Nagari
  • Fonction : Auteur

Résumé

This paper proposes a method to study the impact of passive circuits such as filters, loads, and board layout on conducted electromagnetic emissions. The method is dedicated to power converters with N-active conductors and a ground conductor, followed by passive circuits. A sophisticated use of impedance matrices allows high-frequency current prediction. The power system is divided into functional circuits called blocks. Each passive block is modeled by an impedance matrix. A fast matrix calculation permits association of those matrices to obtain a compact model represented by an impedance matrix. Knowing the converter output voltages and the resulting impedance matrix, currents are calculated to study the influence of each passive block on high-frequency current spectrum, and so the electromagnetic interference. This will help to filter and board layout design for a given load. After presenting the general use of the method, the validation is performed on a differential Class-D audio amplifier used in cell phone applications. The practical application on a two-active conductor system validates the method up to 110 MHz.
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Dates et versions

cea-04523868 , version 1 (27-03-2024)

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Roberto Mrad, Florent Morel, Gael Pillonnet, Christian Vollaire, Philippe Lombard, et al.. N-Conductor Passive Circuit Modeling for Power Converter Current Prediction and EMI Aspect. IEEE Transactions on Electromagnetic Compatibility, 2013, 55 (6), pp.1169-1177. ⟨10.1109/TEMC.2013.2265048⟩. ⟨cea-04523868⟩
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