Comprehensive Analysis and Experimental Design of High-Gain DC-DC Boost Converter Topologies
Global demand for clean and eco-friendly energy sources has inspired decades of far-reaching research in power generation from renewable energy sources. Solar cells, wind, and tidal sources are limited in output power generation compared to the fast-rising power requirements of most industrial applications. Besides, the efficiency of conventional DC-DC boost converters is significantly low due to the presence of parasitic elements culminating in switching losses. This study presents three high-gain boost converter topologies for optimizing the limited voltage generation by solar Photovoltaic cells. The three converters are realized based on a modification of a classical Cuk converter. Simply put, the first proposed converter is realized by the inclusion of one capacitor and one inductor to the classical topology. Similarly, the addition of 3 capacitors, 2 diodes, and one inductor leads to the practical realization of the second proposed topology. Similarly, the third proposed topology consists of additional 3 diodes and 3 capacitors. Based on this estimation, the first, second, and third proposed high gain modified Cuk converter topologies generate output voltages 10 times, 20 times, and 29 times the input voltage respectively when the switching device is gated at 90% duty ratio. Theoretical/mathematical analysis validates the Lt-spice numerical simulation results of all the proposed converters. Furthermore, experimental prototype results were compared with Lt-spice estimation to determine the accuracy of the converters.
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