Straightforward discrete modelling for power converter systems

A modelling approach is presented, which starts from a general description of power converter systems in terms of differential and switching equations and which leads directly to discrete models. The main feature of this approach is, that it is circuit independent and systematic. Therefore most power converter systems can be analyzed, and the corresponding discrete models can be derived in closed form. Moreover, the determination of the steady state can be done in the same context. This generality implies first some fundamental considerations and then a certain mathematical effort in the derivation of this approach. But its application is simple, as it reduces to the use of well defined analytical formulas. The efficiency is demonstrated with the aid of analytical and numerical examples, which cover the study of an asymmetric controlled six pulse bridge and of a complex four quadrant dc/dc-converter.