New Geometry Integrated Inductors in Two-channel Interleaved Bidirectional Converter

Ziwei Ouyang, Ole Cornelius Thomsen, Michael A. E. Andersen, Ole Poulsen, Thomas Björklund

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    A new geometry of integrated inductors for twochannel interleaved bidirectional converter is presented in this paper. The new geometry module integrates two individual inductors by stacking three I-cores. The middle I-core provides a shared flux path with low reluctance which uncouples the two inductors. The air gaps are constructed by separating the I-cores using copper foil windings with well-defined thickness. In this work, inverse connection and direct connection for the two integrated inductors have been analyzed. For the inverse connection, a unique saturation behavior in the middle I-core has been shown. The integrated inductors with new geometry make it possible to build low-profile, low-cost, flexibility DC/DC converters, and it can be extensively designed for low-voltage and high-current required by modern digital applications. Experiment results obtained from a 48V-12V 30A two-phase interleaved buck converter, demonstrates the difference in the inverse connection and the direct connection. Both efficiencies are above 91% from half to full output current.
    Original languageEnglish
    Title of host publicationIECON 2010 : 36. Annual Conference of IEEE Industrial Electronics
    Publication date2010
    ISBN (Print)978-1-4244-5226-2
    Publication statusPublished - 2010
    Event36th Annual Conference on IEEE Industrial Electronics Society - Phoenix, United States
    Duration: 7 Nov 201010 Nov 2010
    Conference number: 36


    Conference36th Annual Conference on IEEE Industrial Electronics Society
    Country/TerritoryUnited States
    Internet address

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