Analysis of inductor current sharing in nonisolated and isolated multiphase dc-dc converters

    Authors

    H. Mao; L. B. Yao; C. S. Wang;I. Batarseh

    Comments

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    Abbreviated Journal Title

    IEEE Trans. Ind. Electron.

    Keywords

    converter; current doubler; current sharing; dc-dc; interleaving; rectifier; synchronous rectifier; PARALLELED DC/DC CONVERTERS; POWER-SUPPLIES; MODE CONTROL; DESIGN; Automation & Control Systems; Engineering, Electrical & Electronic; Instruments & Instrumentation

    Abstract

    Current sharing among inductors is an important issue in both isolated and nonisolated dc-dc converters. In this paper, average current sharing is in-depth modeled and analyzed for both interleaved multiphase buck converters and isolated current-doubler dc-dc converters. The features and comparison of various current-sharing techniques used in isolated and nonisolated dc-dc converters are presented, and the corresponding design guidelines are provided based on the theoretical analysis. The analysis reveals that the state-of-the-art current-sharing technique for multiphase buck converters cannot be directly applied to isolated current-doubler rectifier (CDR) dc-dc converters to achieve balanced inductor currents. Passive and active current-sharing methods are proposed for isolated current-doubler dc-dc converters to balance two inductor currents. Experimental results are presented to verify the modeling analysis and the proposed current-sharing techniques for CDRs in isolated dc-dc converters.

    Journal Title

    Ieee Transactions on Industrial Electronics

    Volume

    54

    Issue/Number

    6

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    3379

    Last Page

    3388

    WOS Identifier

    WOS:000251457600048

    ISSN

    0278-0046

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