• Ch.Sai Krishna Reddy
• Dr.M.Gopichand Naik
• S.Rajendra Prasad

In the last few years, fuel cells have gained more interest as a clean source of energy. Fuel cells are current intensive sources, they produce electricity directly from hydrogen and oxygen. In fuel cell vehicles, the output voltage of the fuel cell source is typically much lower than the voltage required by the DC bus and also this output voltage drops significantly as the load increases. In order to match the input voltage of DC bus to the output voltage of fuel cell vehicles report proposes a modified DC-DC converter for fuel cell vehicles aimed at providing high voltage gain capability. Unlike the conventional topologies, the proposed configuration exhibits a unique capability to provide higher voltage gain with a very low duty ratio, low voltage stress on power switches and capacitors, and suppression of electro-magnetic induction. Consequently, the proposed topological configuration allows a selection of semiconductor switch having low ON-state resistance and relatively lower voltage ratings thereby improving reliability and efficiency and keeping low cost of the equipment. Proceeding further, efforts have been exercised to provide a step-by-step design procedure for each passive element (i.e., capacitor and inductor). Besides, a description of steady-state analysis alongside it has only two operational modes and thereby the complexity of the circuit is decreased. Moreover, the state-space averaging method and small-signal modeling method are adopted to obtain the dynamic model of converter. Operational performance and a detailed stability margin of the proposed DC-DC converter is substantiated through MATLAB®/SimulinkTM simulation test cases and frequency response analysis, respectively. The output voltage of fuel cell is represented by a DC voltage source. The input voltage of DC-DC converter is varied from 25-75V and the output voltage of DC bus is maintained at a constant value In summary, fair comparative assessments with benchmark DC-DC converter topologies confirm superiority of the proposed converter in aspects of high voltage capability, number of part counts and passive elements.

DC-DC Converter, Fuel cell vehicle, state space average model, small signal model

"Modelling and Simulation of Novel High Gain DC-DC Converter Applied For Fuel Cell Vehicles", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.a119-a132, September-2022, Available :http://www.jetir.org/papers/JETIR2209015.pdf

"Modelling and Simulation of Novel High Gain DC-DC Converter Applied For Fuel Cell Vehicles", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppa119-a132, September-2022, Available at : http://www.jetir.org/papers/JETIR2209015.pdf