A Transformer-Less High Voltage Gain DC-DC Converter Based on Cuk Converter and Voltage-Lift Technique

Limitations of traditional power sources and the rising need for renewable energy sources have encouraged researchers and manufacturers to enhance the effectiveness of power converters. Recently, numerous high gain topologies have been extensively designed to solve the main issues of the earlier DC-DC boost converters. In this study, a voltage-lift technique is applied to develop a modified high efficiency, high step-up DC-DC converter derived from a typical Cuk converter. The suggested transformer-less circuit also has the benefits of comprising few components and low-cost implementation compared to similar existing converters. Also, the proposed topology effectively boosts voltage gain by including an additional capacitor and a diode. The operational principle and steady-state analysis of the suggested converter in CCM and DCM are discussed in detail. The capabilities of the recommended topology are then demonstrated by mathematical analysis and comparison with previous similar configurations. Furthermore, the parasitic components are considered in the circuit for precisely computing the voltage gain and efficiency. Finally, experimental test results with nearly 210W output power indicate that the proposed converter can be appropriately employed.