A proposal of structure and control overcoming conducted electromagnetic interference in a buck converter

This paper describes modelling a step-down chopper designed for photovoltaic application to study its performance of electromagnetic compatibility (EMC) in conducted mode. The EMC measurements attended at this stage have shown that the buck converter is harmful device environment. Indeed, fast-switching operation leads higher levels and radiated interference (EMI) subsequently facilitates coupling with surrounding In sense, we present new proposal structure control based on combination two techniques, namely pseudo-random modulation soft switching, thus minimizing emissions source. usefulness strategy, evaluated through comparative study, lies efficiency compared classical PWM method, allowing both reduce rise current voltage gradients spread spectrum over wide frequency range. simulation results prove significant gain has been reached.