Current Self-balance Mechanism in Multiphase Buck Converter

García Suárez, Oscar and Zumel Vaquero, Pablo and Castro Martín, Ángel de and Alou Cervera, Pedro and Cobos Márquez, José Antonio (2008). Current Self-balance Mechanism in Multiphase Buck Converter. In: "39th IEEE Power Electronics Specialists Conference (PESC)", 15/06/2008-19/06/2008, Rodas (Grecia). ISBN 978-1-4244-1668-4. pp. 624-628.

Description

Title: Current Self-balance Mechanism in Multiphase Buck Converter
Author/s:
  • García Suárez, Oscar
  • Zumel Vaquero, Pablo
  • Castro Martín, Ángel de
  • Alou Cervera, Pedro
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: 39th IEEE Power Electronics Specialists Conference (PESC)
Event Dates: 15/06/2008-19/06/2008
Event Location: Rodas (Grecia)
Title of Book: Proceedings of IEEE Power Electronics Specialists Conference, 2008 : PESC 2008
Date: 2008
ISBN: 978-1-4244-1668-4
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Electrónica e Informática Industrial [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Some of the recent applications in the field of the power supplies use multiphase converters to achieve fast dynamic response, smaller input/output filters or better packaging. Typically, these converters have several paralleled power stages with a current loop in each phase and an unique voltage loop. The presence of the current loops is necessary to increase dynamic response (by using current mode control) and to avoid current unbalance among phases. The purpose of this paper is to demonstrate that in CCM, with a proper design, there is an intrinsic mechanism of self-balance that helps a lot in avoiding the current unbalance. Thus, in the buck converter, if natural ZVS is achieved in both transitions, the instantaneous inductor current compensates partially the different dc current through the phases. The need for using n current-loops will be finally determined by the application but not by the converter itself. Using the buck converter as a base, a multiphase converter has been developed. Several tests have been carried out in the lab and the results show clearly that, when the conditions are met, the phase currents are very good balanced even during transient conditions.

More information

Item ID: 3353
DC Identifier: http://oa.upm.es/3353/
OAI Identifier: oai:oa.upm.es:3353
Official URL: http://www.thierry-lequeu.fr/data/PESC/PESC2008/index.html
Deposited by: Memoria Investigacion
Deposited on: 17 Jun 2010 09:36
Last Modified: 20 Apr 2016 12:54
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