Advanced hybrid dual loop control for multi-phases interleaved floating DC-DC converter for fuel cell applications

Fuel cell systems are often low voltage systems requiring their output voltage to be increased to a few hundred volts in order to be suitable for vehicles power-trains, grid connected inverters or many other practical applications. Therefore, boost converter power electronic circuits are required. In this paper, it is designed initially a single and then a dual loop control for a four-phase floating interleaved boost converter (4-phase FIBC) using frequency response techniques. The dual loop control then improved by a strategy where a voltage loop with a linear controller and a current loop with a non-linear sliding controller has shown excellent performance results. The control design has been validated by analysis, simulation and experimental results.