A typical fuel‐cell stack produces a low DC voltage with wide variations; therefore a DC–DC switching converter is required to step up and regulate the output voltage. In this work, a model based on electrical variables is developed for a fuel‐cell stack. This model is later combined with the model of a high step‐up voltage converter to obtain a combined model that incorporates the behaviour of fuel‐cell stack. The resulting model is then used to design an average‐current mode controller for a switching regulator. To test the proposed regulator, a power module with polymer electrolyte membrane fuel cells is used as an input source. This module delivers an output voltage between 26 and 42 V depending on the current being drawn. Experimental results exhibit the robustness of the switching regulator to step changes in the output load and the output voltage of the fuel‐cell stack.
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Leyva-Ramos et al. (2013) studied this question.
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