A Single-Switch High Voltage Gain DC-DC Converter Using Coupled Inductor and Switched Capacitor-Inductor Techniques

In this paper, a single switch non-isolated high voltage gain DC-DC converter using the coupled inductor and switched capacitor-inductor techniques, is suggested for renewable energy applications. Using these techniques, higher voltage gain in the lower duty cycle is achieved. In addition, due to the use of coupled inductors, a smaller voltage stress across the semiconductors such as a switch and diodes is attained. Furthermore, continuous input current and common ground between load and input DC source can be addressed as other advantages of the proposed converter. The operating principles of continuous conduction mode (CCM) are discussed, and the mathematical equations are derived. Under the same conditions, a comparison is conducted to evaluate the performance of the proposed converter. Finally, the proposed converter is designed for 500W with an input voltage of 40V and output voltage of 600V and is simulated in MATLAB/Simulink. The parasitic model is considered to evaluate the theoretical efficiency of the proposed converter. Results are presented to verify the theory mode performance of the converter.