Title

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

Authors

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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