An analytical process to size a flyback converter

The paper deals with the sizing of a flyback converter. The approach propos es to use symbolic calculation to perform sizing times, the accuracy and th e number of Parameters to size. So, it presents a symbolic model to size a flyback converter using optimisation techniques. Such an approach is prefer red to a simulation approach thanks to the flexibility of symbolic models a nd their possibility to treat a great set of criteria in few seconds or min utes. The expressions of a great Part of the criteria are made by an automa tic symbolic process - model builders - and the others are carried out by t he designer. Such a model is used in a gradient optimisation process well k nown for its convergence properties. From this model, a builder carries out automatically the building of a dedicated sizing tool, by automatically tr ansforming it into an optimisation problem and by automatically giving the corresponding sizing tool with its GUI.