Analysis and reduction of common-mode and differential-mode EMI noise in a Flyback switch-mode power supply (SMPS)

Abstract

In the design of power electronics systems, electromagnetic compatibility (EMC) should be well attended. This paper provides a characterization approach for conducted electromagnetic interference (EMI) in a Flyback switch-mode power supplies. However, when such equipment is poorly designed and/or constructed then considerable levels of EMI are generated, and problems are caused both within the network and to the other electronic equipment nearby. Advances in computer aided design software and device models have enabled the waveforms within a switch-mode power supply to be accurately simulated. As a result of this, simulation techniques can be used to predict conducted interference levels generated by a Flyback. This paper introduces an efficient method to predict by simulation the conducted EMI of Flyback, accordingly mitigation is incorporated to reduce these electromagnetic emissions and susceptibility of SMPS.