Robust fixed frequency control for parallel connected Forward/Buck converters

Issue		Eur. Phys. J. Appl. Phys. Volume 24, Number 2, November 2003


Page(s)		121 - 138
Section		Physics and Mechanics of Biological Systems
DOI		10.1051/epjap:2003068
Published online		16 September 2003

Eur. Phys. J. Appl. Phys. 24, 121-138 (2003)
DOI: 10.1051/epjap:2003068

Robust fixed frequency control for parallel connected Forward/Buck converters

S. Pierfederici, J.-P. Martin, F. Meybody-Tabar and B. Davat

Groupe de Recherche en Électrotechnique et Électronique de Nancy, 2 avenue de la forêt de Haye, 54516 Vandoeuvre-lès-Nancy Cedex, France

Jean-Philippe.Martin@ensem.inpl-nancy.fr

(Received: 19 April 2002 / Received in final form: 29 November 2002 / Accepted: 12 June 2003 Published online: 16 September 2003)

Abstract
In this paper, we present a robust control strategy which is well adapted to parallel connected Forward/Buck converters. It is based on a non-linear controller which uses the advantages offered by sliding mode control and peak current techniques. This control offers fixed frequency control without using equivalent control calculation, synchronized ramp or variable hysteresis bandwidth. It also provides good robustness depending on variations of load parameters. A model of the system is developed which allows us to study the system independently of the module number that constitutes the structure. The controllability of the system is discussed and an analysis of the current behavior is provided.

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