Abstract—Currently, automotive traction systems are increasingly
being revised from combustion engine drives to electric
propulsion. The high power cables of electric vehicles are routed
close to various communication, sensor, or control units. This circumstance
results in a tightened challenge for the developing engineers,
who need to ensure the electromagnetic compatibility of
these miscellaneous and adjacent systems. A trial-and-error approach
in the development process of electromagnetic interference
filters can only be avoided if the influence of the network
impedances within the high voltage traction harness on conducted
RF disturbances is known. This contribution presents the current
methodology of determining the conducted emissions of power inverters
for electric driven cars. It highlights the differences between
the traditional low-voltage cable wiring and novel high-voltage
traction harnesses, and their impact on the network impedances.
An adaption of the line impedance stabilization networks used recently
to the characteristic impedance of the high-voltage cables
applied shows the influence of terminationmismatch on conducted
emissions within the traction harness. High-voltage components
employed in a car are usually supplied by a traction accumulator
battery, which acts as transmission line termination. The influence
of a battery’s input impedances on disturbances within a component
level EMC test setup is shown.