Co-simulation of Circuit/Circuit type Solvers for EMC Applications Using a New Relaxation Method

This paper studies a new co-simulation scheme for coupled problems that is based on the principle of the adapted transmission line with an application to circuit-circuit type coupled simulations. Co-simulation between two or more circuit solvers is usually based on waveform relaxation methods and it results in an iterative process whose convergence depends on the type of interface variables (IVs) on the interface between the sub-circuits. The convergence of the IVs of this new method is tested in two examples of circuit simulations: a functional simulation of a Buck converter and an EMC simulation.