Comparative Analysis of Electromagnetic Radiated Emission for electric powertrain and conventional Spark Ignition (SI) powertrain

Due to the transformation of the automotive industry from conventional vehicles to electric vehicles, new challenges have arrived concerning Electromagnetic Compatibility. Though the Radiated Emission limits are the same for both types of powertrains of vehicles, but due to the phenomena of conversion from high voltage to low voltage, rapid charging/discharging, and different components involved in electric powertrain, Radiated Emission from electric vehicles give a strikingly different trend which is challenging to combat. When comparing with the conventional Spark Ignition vehicle, many other electronic components of electric vehicle stay ON in the “Vehicle Ignition ON” state. Because of this, we observe a significant shift in the amplitude, and frequency throughout the frequency band of Radiated Emission measurement. This paper presents comparative analysis of the changing trends of Radiated Emission from Spark Ignition Engine to the electric powertrain in the “Vehicle Ignition ON” state, i.e., Narrow Band Emissions. It shall help the electric vehicle manufacturers to understand the underlying aspects of designing electric powertrains to meet Radiated Emission limits.