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.
Industrial Electronics, IEEE Transactions on
Volume 51, Issue 2, April 2004 Page(s): 419 - 428
Digital Object Identifier 10.1109/TIE.2004.825273
Summary: 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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