Automatic Design and Optimization of an EMI Filter Using Commercially-available Components

Designing customised EMI filters is a challenging task since the choice of the circuit topology as well as of the discrete values of the electric components, for satisfying multiple electrical requirements, is not trivial and no standard guidelines are available. An approach based on a particle swarm optimiser, used in conjunction with a circuital simulator, is described. By using equivalent models of commercial components, such a method allows the synthesis of reliable and ready-to-build filters. As an example, a filter prototype is realised and its efficiency is assessed through numerical and experimental evaluations