Abstract
In this paper, a non-isolated high gain switched inductor dc-dc multilevel cuk converter for photovoltaic applications is presented, which combines switched inductor with a voltage multiplier. By doing so, the conversion ratio is increased. High voltage gain cannot be possible if using traditional cuk converter. The output voltage can be boosted negatively by using a combination of capacitors and diodes without disturbing the main circuit is the key advantage of the proposed design. This switched inductor multilevel cuk converter topology is suitable for photovoltaic applications where the voltage is needed to be increased with negative polarity. 2N capacitors, 2N+2 diodes, three inductors, single switch, and single input supply are used to design N level switched inductor dc-dc multilevel cuk converter topology. The proposed converter is designed for three levels with rated power 300W, output voltage is -225V, input voltage is 12V, switching frequency is 50kHz, and 75% duty cycle. This design is simulated and tested by using Matlab/Simulink.