Abstract
M.Ing. (Electrical Engineering)
Renewable energy application has become a focal point of most researches in recent times. This is motivated by the need to achieve an eco-friendly atmosphere and to mitigate the environmental hazards such as global warming and climate change which are drawbacks of conventional energy generation. High power application is equally on fast rising demands especially for industrial use making conventional DC-DC converters less applicable. Three High gain Modified DC-DC Cuk converters were proposed in this thesis. Voltage Lift Technique (VLT) is used to increase the voltage gain of the proposed converter. The converters produced amplified versions of the supply voltage by the inclusion of passive components and switch capacitor network. In perspective view, by a simple addition of diodes, capacitors and inductor to the classical Cuk circuit, the first, second and third proposed high gain modified Cuk circuits generated voltage gain of 10, 20 and 29 respectively when the switching gate is driven at 90% duty ratio. MATLAB/Simulink and Lt-spice simulations validate the numerical analysis and prototype results for different values of the duty ratio.