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For the control of non-linear system, nonlinear control theory is widely accepted as a better technique due to its robustness against uncertainty and parameter variations over the inherent short-comings of the linear control theory. A non-linear control technique named Sliding Mode Control (SMC) technique is characterized by its simplicity in analysis, design, high efficiency and robustness towards...
In transport application, long high power PEM fuel cell stacks could suffer from voltage discrepancy between cells due to severe constraints or appearance of localized faults in case of bad water management, moreover the output power of the stack is limited by the weakest group of cells. This article proposes a three-part segmented fuel cell associated with an isolated four-source DC/DC converter...
This paper suggests an isolated dc/dc converter using an unregulated LLC converter for fuel cell applications. The LLC converter operates as an isolated voltage amplifier with a constant voltage gain, and a nonisolated converter installed in the input stage regulates the output voltage under a wide variation of fuel cell stack voltage. By separating the functions, the unregulated LLC converter can...
Fuel Cell (FC) is one of the promising distributed generation resources which are based on renewable energies. Clean electricity generation, high efficiency and high energy density of the fuel cells make them attractive for lots of engineers. In this paper we discuss about the operational principles of fuel cell generally. Then, a circuit model of them will be introduced. Based on the model, we designed...
This paper is going to develop two soft switching DC-DC converters based on the half-bridge inductive converter for the design of the power electronic interface for fuel cell applications. One operates in ZVS mode, another in ZCS mode. The ZVS converter can overcome the drawbacks of the original structure but is more complicated. The ZCS converter can't operate at the duty cycle less than 0.5 but...
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