Modeling of current mode controlled boost converter supplied by fuel cell suitable for controller design purposes

This paper presents the derivation of a linear model with changeable parameters of constant frequency peak current mode controlled DC/DC boost converter supplied by a PEM fuel cell stack. The derived model has the same structure irrespective of the conduction mode and therefore, it is suitable for design of simple and advanced controllers of the output voltage. Experimental results on the system with 450 W boost converter supplied by PEM fuel cell emulator show that the derived model accurately describes the system in a given operating point, determined by the load resistance or output current.

► We derived the linear model of the CMC boost converter supplied by the fuel cell. ► The compensation ramp is included in the model in the both conduction modes. ► The model is valid in the whole range of normal operating conditions of the system. ► It is suitable for design of advanced controllers of the converter output voltage. ► The experimental results confirm the accuracy of the derived linear model.