Time domain analysis of switching circuits by using the simulink-based co-simulation

The paper deals with the transient analysis in the simulation techniques of switching circuits typically employed in power electronics. It is not easy to simulate power electronic circuits, because they are variant topology circuits. Most simulators consider an approximation model for the switch in order to obtain an invariant topology, but this approach introduces new problems. A good solution to simulate power switching circuits could be the co-simulation. In the paper mathematical basics of a co-simulation are recalled and a set of four simulations is considered. A first comparison reports the simulation results utilizing a general purpose simulation software (PSpice) and those obtained by means of the co-simulation PSpice-Simulink. In the second comparison, the simulation results utilizing specific simulation software (PSIM) and those obtained by means of the co-simulation PSIM-Simulink are examined.