A Novel MIMO Control for Interleaved Buck Converters in EV DC Fast Charging Applications

This brief proposes a new multiple input multiple output (MIMO) control for off-board electric vehicle (EV) dc fast chargers. The proposed feedback matrix design avoids multiple tuning of controllers in multiple and interconnected loops while improving the performance of interleaved dc buck converters over classical PI/PID controls. The innovative features of the presented strategy are the reference current monotonic tracking from any initial state of charge with an arbitrarily fast settling time and the fast compensation of both load variations and imbalances among the legs. Numerical results validate the performance improvements of the proposed discrete-time MIMO algorithm for interleaved buck converters over classical PI/PID controls. Full-scale hardware-in-the-loop (HIL) and scaled-down prototype experimental results prove the feasibility and effectiveness of the proposal

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New nonovershooting step response control for the DC-DC Buck Converter

A key challenge in the control of the DC-DC buck converter is to compensate its lightly damped dynamics, which depend upon the load variations. In this paper we examine the application to DC-DC converter circuits of the linear state feedback tracking control method introduced by Schmid and Ntogramatzidis. This method aims to deliver a time-domain transient response that is both rapid and nonovershooting. The method is tested on a DC-DC buck converter circuit subject to load variations and its transient and robustness performance is compared against that obtained from controllers designed by classical PID methods and also by the feedback posicast method of Hung