Multivariable Modeling and Decentralized Robust Linear Controllers for Current-Sharing DC/DC Converters

In this paper, the multivariable approach is utilized to obtain linear models of current-sharing switching converters. These multivariable linear models are suited for frequency framework of various linear control design techniques. Frequency domain setup is proposed for the robust linear design and all of its elements are defined in order to obtain simple decentralized robust PI/PID type controllers by reduction. The feasibility of the approach is verified for robustness and performance in a three parallel boost converters case study.