Design and implementation of dual input Cuk-SEPIC converter for energy storage

In this paper the design of a Dual input Cuk-SEPIC fused DC-DC converter is proposed, using solar and wind sources as input and providing a constant 12V output which is used for battery charging applications. Since Solar and Wind sources usually complement one another i.e. if a solar output is unavailable the wind output is available and vice-versa, this system would provide a constant voltage throughout. Also a feedback system has been designed which would ensure that the output obtained is 12v regardless of the input variations. The designed converter has been used to charge a 12V, 2000 mA-h Li-ion battery using MATLAB/Simulink. It can be seen from the result that the feedback system drastically decreases the variation in the output voltage with the variations in the input voltage.