Simulation of emissions of power electronic devices in electrical and hybrid electrical vehicles

The high voltage supply system in electrical (EV) and hybrid electrical (HEV) vehicles can lead to serious problems regarding electromagnetic compatibility. In this paper the modelling and simulation of important components of an electrical drive system is described. Several simulation approaches like field and circuit simulation had to be combined with transmission line models to get desired results. The circuit system was modelled and simulated using VHDLAMS. The link from field simulation to circuit simulation was realized with a model order reduced coupling model derived from S-parameter computations. Each component model and the total system simulation approach were verified by measurements. Special emphasis was placed on the very critical lower frequency range. The EMC behaviour of a vehicle electrical drive system can be optimized based on this modelling approach.