In the context of flyback converters, electromagnetic compatibility (EMC) represents a major challenge, particularly due to interference generated by fast switching events and parasitic resonances caused by non-ideal components (leakage inductances, parasitic capacitances, etc.). This paper presents an integrated approach to the design and validation of snubber circuits aimed at mitigating these phenomena. A theoretical model was developed to size RC and RCD snubbers, considering dv/dt constraints and associated losses, and subsequently validated through simulation. The results demonstrate that the inclusion of a snubber significantly reduces voltage spikes and EMI radiation while preserving the converter's efficiency. This study thus provides concrete insights for the integration of interference reduction solutions in high-frequency power conversion applications that comply with EMC standards.

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Optimization of Electromagnetic Compatibility in Flyback Converters Through the Integration of Snubber Circuits

  • Ali Ait Salih,
  • Zakaria M’barki,
  • Youssef Mejdoub,
  • Kaoutar Senhaji Rhazi

摘要

In the context of flyback converters, electromagnetic compatibility (EMC) represents a major challenge, particularly due to interference generated by fast switching events and parasitic resonances caused by non-ideal components (leakage inductances, parasitic capacitances, etc.). This paper presents an integrated approach to the design and validation of snubber circuits aimed at mitigating these phenomena. A theoretical model was developed to size RC and RCD snubbers, considering dv/dt constraints and associated losses, and subsequently validated through simulation. The results demonstrate that the inclusion of a snubber significantly reduces voltage spikes and EMI radiation while preserving the converter's efficiency. This study thus provides concrete insights for the integration of interference reduction solutions in high-frequency power conversion applications that comply with EMC standards.