Survey of compatibility levels of the electromagnetic disturbances in the 2 kHz-150 kHz range and the use of the relevant test methods

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Dr. Varjú György
Department of Electric Power Engineering

In my thesis i deal with the elctromagnetic compatibility (EMC) of the 2-150 kHz frequency range wich is quite an interesting and a very actual topic. This frequency range is represented as an unregulated range from the electromagnetic compatibility point of view. Immunity and emission levels, limits are not defined except some product standards. Several EMC standards exist for the DC-2 kHz range and for the radiofrequency band starting just above 150 kHz, so the compatibility is most likely to met with the requirements in these ranges. But there is still a gap between them in the 2-150 kHz frequency range where ensuring EMC is a very hard task. In that unregulated frequency range equipments may have a potential impact to influence other equipments proper function installed in their electromagnetic environment. There is an on-going standardization work to define the compatibility levels of this frequency range both at International, as well as at European level. As a result of this work the Amendment of IEC 61000-2-2:2010 standard was publicated in this year. This standard defines the compatibility levels for the 2-30 kHz frequency range. In my thesis i present the electromagnetic compatibility problem of the 2-150 kHz frequency range and provide an overview of the current situation of the standardization. I present the immunity test methods which aim is to verify the immunity of different equipments, and present two different measurement methods for the 2-150 kHz frequency range. Beside the test methods i also present the main sources of conducted emissions in the 2-150 kHz frequency range as well as the main victims. And finally based on some publications i present the findings regarding the propagation of high frequency conducted disturbances.


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