Optimizing the winding strategy of the transformer in a flyback converter

This work presents a study of the influence of the winding strategy in the parameters of the flyback transformer. A frequency and geometry dependent model generated from FEM simulations has been employed in order to study the influence of the position of the windings on the leakage energy and AC resistance. A study of the interleaving technique in the flyback transformer has also been developed using the FEM solver. Conclusions of the advantages of the interleaving technique in the flyback transformer compared with its application in common transformers have been extracted. The influence of the leakage inductance in primary and secondary windings has been studied by means of SPICE simulations. The final goal of this paper is to obtain winding strategy design rules to minimize the leakage inductance and AC resistance in order to optimize power converter performance.