Current distribution control design for paralleled DC/DC converters using sliding-mode control
Lopez, M.
de Vicuna, L.G.
Castilla, M.
Gaya, P.
Lopez, O.
Univ. Politecnica de Catalunya, Vilanova I La Geltru, Spain;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: April 2004
Volume: 51,
Issue: 2
On page(s): 419- 428
ISSN: 0278-0046
INSPEC Accession Number: 7964597
Digital Object Identifier: 10.1109/TIE.2004.825273
Current Version Published: 2004-04-05
Abstract
This paper shows the analysis and design of a parallel-connected converter system using sliding mode control techniques. The design is particularised for a system that consists of N boost converters and a current feedback loop based on a proportional-integral compensator of the output voltage error. The paper emphasises the advantages of the sliding-mode control over the classic design method based on small-signal models, thus providing an effective and robust means of controlling nonlinear multi-input converters. The design is based on the Utkin conditions, which permit us to know the regions under which a sliding mode exists. This fact allows us to design the compensator and to introduce some modifications in the control loop that avoids input-current overshoots during the system startup. Simple design expressions are obtained and verified with simulation and experimental results, thus showing the improvements achieved with the proposed modifications.
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