Modelling and Analysis of Mixed Mode EM Emission in EV for Electro-Magnetic Compatibility

Abstract

The emergence of electric vehicles (EVs) has a great impact on energy utilization and controlling pollution in the environment. The EVs are significantly different from conventional vehicles in terms of a control units such as the use of an electric drive system (EDS) instead of the internal combustion engine (ICE) and other aspects that affect the vehicle's performance. One such unique feature of EVs is the use of power line communication (PLC), where main lines from the battery to other devices is used to exchange information. The high switching characteristics of the EDS as well as the implementation of PLC, have a drawback of generating ElectroMagnetic Interference (EMI). The Common-Mode (CM) and Differential-Mode (DM) currents of the EDS and PLC contribute to the EMI, and separate analysis of both CM and DM is essential, in spite of the Mixed-Mode (MM) analysis, to get the accurate picture of emission levels and for improving the design and performance. Hence, this work aims to model the EM emission of EDS and PLC in the EV using suitable simulation software. For the implementation of the same MATLAB-SIMULINK tool is used. In this work, both CM and DM conducted emission spectrum and general MM spectrum were analyzed. The current through EV systems are the main source of EM emission at high frequency and analyzed results indicate the same. The future scope of this work involves, applying suppression techniques to suffice the Electro-Magnetic Compatibility (EMC).