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New Framework for Optimal Current Sharing of non-identical Parallel Buck Converters Extended version

Abstract : In this paper, parallel interconnection of buck (step-down) converters is considered. Classical control of such a topology uniformly distributes load current over branches. Yet, whenever non-identical converters (having distinct characteristics) are considered, this paper demonstrates, both theoretically and experimentally, that minimizing overall losses requires non uniform and even load-depend current distribution. In this context, a novel highly modular hierarchical control framework is proposed for arbitrary number of buck converters. Solutions for the two related design steps are given, which leads to a control law minimizing total losses as well as correcting voltage deviation for any operating point and without knowledge about load magnitude. Several formal statements and experimental results support our discussions.
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https://hal.archives-ouvertes.fr/hal-01550193
Contributor : Romain Delpoux <>
Submitted on : Thursday, June 29, 2017 - 2:12:55 PM
Last modification on : Thursday, February 13, 2020 - 1:23:42 PM
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  • HAL Id : hal-01550193, version 1

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Romain Delpoux, Jean-François Trégouët, Jean-Yves Gauthier, Cyril Lacombe. New Framework for Optimal Current Sharing of non-identical Parallel Buck Converters Extended version. [Research Report] Laboratoire Ampère CNRS UMR 5005, Université de Lyon, INSA - Lyon. 2017. ⟨hal-01550193⟩

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