S. M. Rakhtala

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Transients in load and consequently in stack current have a significant impact on the performance and durability of fuel cell. The delay exciting in auxiliary equipments in fuel cell system such as pumps, heaters, back pressures will degrade system performance and lead to problems in controlling tuning parameters including temperature, pressure and flow(More)
In recent years, fuel cells are emerging as main power sources for most applications. These sources have slow dynamic response and should be protected against current impulses. These transients will be harmful to the membrane electrode assembly (MEA). Using only FC in this operational condition will degrade system performance and efficiency. Therefore the(More)
This paper deals with an high-order sliding-mode approach to the observer-based output feedback control of a PEM fuel cell system comprising a compressor, a supply manifold, the fuel-cell stack and the return manifold. The suggested scheme assumes the availability for measurements of readily accessible quantities such as the compressor angular velocity, the(More)
Fuel cells are electrochemical generators where produce electrical energy from chemical reactants. It is why these are good candidates to provide clean energy generation. This paper presents a multi-input multi-output (MIMO) dynamic model of polymer electrolyte membrane (PEM) fuel cells. Thereafter a nonlinear controller is designed using the proposed model(More)
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