EMI Worsening in a SMPS with Non-linear Inductor

Authors

  • Daniele Scirè Author
  • Giuseppe Lullo Author
  • Gianpaolo Vitale Author

DOI:

https://doi.org/10.24084/repqj20.352

Keywords:

electromagnetic interference (EMI) filter, Switched Mode Power Supply, power density, nonlinear magnetics, saturable core, inductor

Abstract

This paper is focused on the input current in a Switched Mode Power Supply (SMPS) in which the power inductor is exploited up to the saturation showing a non-linear behaviour. The input current exhibits a distortion due to the non linearity. The electromagnetic interference (EMI) caused by the ripple at switching frequency, superimposed to the DC value of the input current, requires a suitable design of the input differential mode (DM) filter. The input current is analyzed both in the time and frequency domain for different operating conditions, and it is compared to a SMPS equipped with a traditional linear inductor.

Author Biographies

  • Daniele Scirè

    Department of Engineering, University of Palermo. Italy

  • Giuseppe Lullo

    Department of Engineering, University of Palermo. Italy

  • Gianpaolo Vitale

    ICAR, Institute for high performance computing and networking, National Research Council (CNR). Italy

Downloads

Published

2024-01-03

Issue

Section

Articles