Modeling and simulation of conducted EMI noise generated in the electric power converters of the electric and hybrid electric vehicles

In developing a complex power electronic system, proper modeling at prototype sample level can save the time and cost to develop final product. Hybrid Electric Vehicle (HEV) is equipped with several high-powered electric devices such as DC/DC converters and DC/AC inverters. Considering that there are many restrictions in mounting and wiring the electric power system in engine room, analysis and modeling of Electromagnetic Interference (EMI) coupling path is crucial in designing optimal electric power system satisfying various EMC regulations. In this thesis, conductive common mode (CM) and differential mode (DM) equivalent models for those electric power converters used in Hybrid Electric Vehicles (HEV) were developed and evaluated through the simulation both in time domain and frequency domain. The simulation results were compared to those of real experimental tests performed in EMC testing Laboratory. It is confirmed that the suggested noise equivalent models followed the actual power electric systems in the point of conducted CM and DM EMI view.