Measurement and Evaluation of the Conducted Emissions of a DC/DC Power Converter in the Frequency Range 2–150 kHz

In this paper the conducted emissions generated by a DC/DC power converter system in the 2-150 kHz frequency range are studied in both time and frequency domains. Measurement and evaluation of the conducted emissions are carried out to assess the level of the emissions of the system with reference to the existing standards and to point out which measurement settings may have an impact on the measurement results. A prototype of a DC/DC battery charger for electric vehicles was used in the experiments. The results show that the DC/DC power converter system may not result in being compliant to some of the existing standards in the frequency range 2-150 kHz and that measurement settings may affect significantly the evaluation of the conducted emissions.