Dimensionnement d'un filtre hybride de mode commun

This paper proposes the study and the design of a common mode hybrid electromagnetic interference (EMI) hybrid filter (HEF) able to cancel the CM electromagnetic interference noise in a given frequency range. In hybrid EMI filtering, low frequency interferences are filtered by an active EMI filter (AEF) and higher frequencies by a passive filter. The first part of this work is devoted to the study and dimensioning of the AEF. In this part, the principle of operation of the proposed AEF and design rules are addressed. A functional prototype respecting the aeronautics standard (DO160) up to 1 MHz is realised. The last part is dedicated to the choice and the study of the passive filter for the high frequencies allowing to satisfy the standard. Experimental results validate the proposed methodology.