Near Field Coupling Measurement and Modeling between High Voltage and Low Voltage Cables in Electric Vehicles

The near field electromagnetic interference coupling between the high voltage cables and low voltage cables in electric vehicles and hybrid electric vehicles will degrade the reliability of the vehicle's electronic system and may cause serious safety issues on the vehicles if a large disturbance appears on the transmission lines. In this paper, an alternative scattering parameter measurement technique is proposed for the complicated immunity measurement approach used in CISPR 25 standard. Both inductive and capacitive coupling models are developed based on the immunity test. The effect of electromagnetic interference filters on immunity test results is analyzed.