Control of DC/DC Buck-Parallel Converter Implemented in FPGA

This paper documents the design and implementation of a controller for DC/DC Buck-Parallel Converter under the perspective of differential flatness and active disturbance rejection control approach based on GPI extended state observer. The main objectives of the proposed controller are to regulate the output voltage and a balance of currents for parallel converters. The hardware architecture of this controller was modelled using tools with a high level of hardware abstraction and implemented in a FPGA Artix-7 of the Xilinx Company. Finally, the performance of the proposed controller is shown through a series of experiments that consisted of subjecting the converter to various external, unknown and variant over time disturbances, and changes in system parameters.