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The Input Impedance of Common-Mode and Differential-Mode Noise Separators
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2015 (English)In: IEEE transactions on industry applications, ISSN 0093-9994, E-ISSN 1939-9367, Vol. 51, no 3, 2352-2360 p., 6954393Article in journal (Refereed) Published
Abstract [en]

This paper discusses the.-networks and other circuits designed to separate the conducted electromagnetic interference (EMI) into its common mode (CM) and differential mode (DM) components. The input impedances of CM/DM separators must be 50 Omega resistive in the measurement frequency range, and they must be independent of the values of the noise signals and noise source impedances. The conditions for achieving such input impedances are derived. It is shown that many of the proposed separators, including the.-network suggested in the International Special Committee on Radio Interference (CISPR) 16-1-2 standard, do not fulfill the input impedance requirement. This leads to unreliable CM and DM measurements and, consequently, to the oversizing of EMI filters and design by trial and error.

Place, publisher, year, edition, pages
2015. Vol. 51, no 3, 2352-2360 p., 6954393
Keyword [en]
Common mode (CM), delta network, differential mode (DM), electromagnetic compatibility (EMC), electromagnetic interference (EMI), International Electrotechnical Commission (IEC), measurement, noise separator, power filters
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering; SRA - Energy
URN: urn:nbn:se:kth:diva-169278DOI: 10.1109/TIA.2014.2370094ISI: 000354944600044ScopusID: 2-s2.0-84930221703OAI: diva2:821495

QC 20150615

Available from: 2015-06-15 Created: 2015-06-12 Last updated: 2016-02-26Bibliographically approved

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Nee, Hans-Peter
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Electrical Energy Conversion
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