Nonlinear Continuous Time Control of a Bidirectional Coupled-Inductor Cuk Converter

Joan MAJO  Luis MARTINEZ  Alberto POVEDA  Luis Garca de VICUA  Francisco GUINJOAN  Antonio F. SANCHEZ  Jean Claude MARPINARD  Max VALENTIN  

IEICE TRANSACTIONS on Communications   Vol.E75-B   No.11   pp.1134-1141
Publication Date: 1992/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Telecommunications Energy Systems and Switching Power Converters)
nonlinear control,  large-signal,  converter dc-dc,  coupled-inductor,  

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Under conditions of order reduction, a nonlinear control of a bidirectional coupled-inductor Cuk converter suitable for large-signal applications is presented. The converter is accurately modelled as a second order bilinear system and the conditions established for local stability. The nonlinear control law which is implemented by means of one analog divider, standard operational amplifiers and a pulse-width modulator. As a result, the output variable follows proportionally the reference signal, thus allowing the obtention of different types of power waveforms in the converter output. Experimental results verify the theoretical predictions.