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Evaluation of Soft Magnetic Composites for Inductive Wireless Power Transfer

Barth, Daniel; Cortese, Giuseppe; Leibfried, Thomas

Abstract:
Synthetic polymer-bonded soft magnetic composites can implement an additional magnetic path control in high-power inductive charging systems. This paper presents a material analysis and evaluates the impact of soft magnetic composites. We focus on low ferrite-volume fraction material which has low permeability and can be shaped by injection molding. It must be combined with sintered ferrite plates for effective shielding on the back side of the coil. From a mathematical analysis, we derive shaping guidelines to increase coupling and reduce eddy current loss. Simulation of a receiver coil including soft magnetic composites shows that low permeability is sufficient if it complements a ferrite shielding. To verify the modeling approach and analyze magnetic loss, we present measurement data of a coil provided with a soft magnetic composite material.



Originalveröffentlichung
DOI: 10.1109/WoW45936.2019.9030664
Zugehörige Institution(en) am KIT Institut für Elektroenergiesysteme und Hochspannungstechnik (IEH)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 18.06.2019
Sprache Englisch
Identifikator ISBN: 978-1-7281-0881-0
KITopen-ID: 1000117840
Erschienen in 2019 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW), London, United Kingdom, 18 - 21 June 2019
Veranstaltung 2019 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW 2019), London, Vereinigtes Königreich, 18.06.2019 – 21.06.2019
Verlag IEEE, Piscataway (NJ)
Seiten 7–10
Schlagwörter wireless power transmission, inductive charging, electric vehicles, magnetic path control, composite materials, inductive coupling, ferrites, magnetic shielding, permeability, couplings, soft magnetic materials, windings
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