A robust control of a 4-leg floating interleaved boost converter for fuel cell electric vehicle application

This paper proposes a real time validation of a robust control strategy applied to a non-isolated DC/DC power converter with a high step-up ratio, that is suitable for fuel-cell electric vehicle applications. The controlled converter in this work is a four phases floating interleaved boost converter (FIBC) that is selected to achieve a high output voltage, improved efficiency, a reduced input current-output voltage undulation. The proposed controller scheme is designed thanks to a dual loop control based on S/KS mixed Sensitivity H infinity approach that consists of an external voltage loop and an inner current loop to attain a fast regulation versus the disturbance and load variation with a high dynamic performance and robustness even in failure mode. The effectiveness and robustness of the proposed control have been tested firstly by the simulation using Matlab-Simulink software then have been validated through experimental results conducted on 1.2-kW laboratory prototype piloted via dSPACE-1104 single card under different scenarios: load variation, steady-transient responses and Open-Circuit power switch failure mode. (C) 2019 International Association for Mathematics and Computers in Simulation (IMACS). Published by Elsevier B.V. All rights reserved.