A Transformerless High Gain Switched-Inductor Switched-Capacitor Cuk Converter in Step-Up Mode

This paper introduces a transformerless high gain switched-inductor switched-capacitor Cuk converter in step-up mode. This kind of converter provides a negative to positive step-up DC-DC voltage conversion. The main advantages of using the proposed converter over the classical Cuk converter are achieving high voltage gain with low voltage stress on semiconductor devices and using fewer components compared with other Cuk converters reached the same level of high voltage gain. The proposed converter has the ability to reach 13 times the input voltage when D=0.75 where D is the duty cycle. This high voltage gain is achieved by using a switched inductor and switched-capacitor techniques. A detailed theoretical analysis of the continuous conduction mode (CCM) is represented. Likewise, the major aspects of circuit design have been derived. The presented paper shows a comparison between the proposed Cuk converter with other Cuk converter topologies. The proposed converter has been designed for 12V input voltage, -152V output voltage, 100W rated power, 50kHz switching frequency, and 75% duty cycle. A circuit has been developed in MATLAB/SIMULINK and results are discussed.