An approach to modelling double converters

In this paper an approach to modelling double converters is presented. With these converters two fully regulated outputs can be obtained, controlling the duty ratio and the frequency of the power switch. The modelling method is based on the well-known averaged methods, adapted to consider the influence of the frequency variations in both outputs. As a result, the canonical circuits of the buck, boost, buck-boost derived double converters are obtained. The theoretical results have been experimentally verified.