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The Input Impedance of Common-Mode Differential-Mode Noise Separators
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0002-5027-3491
ETH Zurich, Switzerland.
ETH Zurich, Switzerland.
Bel Power Solutions, Slovakia.
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2015 (English)In: IEEE transactions on industry applications, ISSN 0093-9994, E-ISSN 1939-9367, Vol. 51, no 3, p. 2352-2360, article id 6954393Article in journal (Refereed) Published
Abstract [en]

This paper discusses the Δ-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 Ω 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 Δ-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, p. 2352-2360, article id 6954393
Keywords [en]
common mode, delta network, differential mode, electromagnetic compatibility, electromagnetic interference, IEC, measurement, noise separator, power filters
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-31907DOI: 10.1109/TIA.2014.2370094OAI: oai:DiVA.org:ri-31907DiVA, id: diva2:1151765
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2019-07-09Bibliographically approved

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Kostov, Konstantin Stoychev

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