Characterization of ferrite core properties for FM-band filtering in automotive applications

Konferenz: CIPS 2018 - 10th International Conference on Integrated Power Electronics Systems
20.03.2018 - 22.03.2018 in Stuttgart, Deutschland

Tagungsband: ETG-Fb. 156: CIPS 2018

Seiten: 6Sprache: EnglischTyp: PDF

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Boenisch, Sven (Brandenburg University of Technology Cottbus-Senftenberg, Universitätsplatz 1, 01968 Senftenberg, Germany)
Hoffmann, Stefan; Hoene, Eckart (Fraunhofer IZM, Gustav-Meyer-Allee 25, 13355 Berlin, Germany)
Schmidhuber, Michael (Sumida Components GmbH, Dr. Hans-Vogt-Platz 1, 94130 Obernzell, Germany)

This paper presents an investigation into ferrite core properties of 3-wire DC common mode chokes used for FM-band filtering. Starting with a selection of a prospective material based on impedance measurements using standard 42/26/18 toroidal cores, a size optimized 3-wire common-choke has been designed for a 4kW 48V/80A to 12V/230A unidirectional switch-mode power converter. This common-mode filter choke has been characterized for conducted emission suppression and especially for its FM-band performance in a broad frequency range from 100kHz up to 200MHz, based on mainly manufacturer specific automotive requirements. The performance is characterized for unsymmetric (common-mode), symmetric (differential-mode) and asymmetric (single-mode) signals under non-biased and DCbiased conditions. Conclusions are drawn for the proper design of high power common-mode filter chokes for automotive applications.