On the Robust Control of DC/DC Buck-Parallel Converter

This paper presents the design and implementation of robust controller for DC/DC Buck–Parallel Converter under the perspective of differential flatness and active disturbance rejection control based on extended state observer or GPI. The main goal is to obtain a regulated output voltage and balance of currents for parallel converters. Control law was implemented on the Nexys 4 development board with an Artix-7 FPGA to evaluate controller performance. For this, laboratory tests were performed subjecting the converter to unknown external perturbations and variations in time and changes in the parameters of the system, counteracting the effects of these perturbations.