Automotive equipments EMC modeling for electrical network disturbances prediction

For some years, the number of electronic devices in the car body increases consequently. Their huge integration number raise EMC unknown interferences that can disturb safety, comfort or functional devices on the electrical network. To guarantee the worst case network functioning, and assess equipments immunity to unwanted electrical phenomena, the accurate knowledge of network components (loads, sources, interconnections, spatial arrangement) is imperative. In order to predict disturbances and subsequently optimize the electrical network structure, this paper proposes an equipments input characterization method (loads, sources) based on a Thevenin approach. A simulation of a DC Motor electrical transient in switching state has been implemented