An Improved Non-Isolated Quadratic DC-DC Boost Converter With Ultra High Gain Ability

This paper introduces an improved quadratic DC-DC boost converter to provide an ultra-high level voltage gain with the switched-capacitor cell based structure. The proposed converter has the ability to excel the output voltage gain to the ultra-high level without any voltage doubler circuit. Hence, the total number of components is less compared to the conventional topologies. The proposed converter offers reduced voltage stress on the capacitors, diodes, and semiconductor switches while generating a high voltage gain effect with a low duty cycle. In addition, the continuous source current (CSC) and input-to-output side ground-sharing features are also available for renewable energy applications. The steady-state and comparative performance analysis with similar topologies and power loss calculations are presented in this paper. Furthermore, the simulation results extracted from the Matlab/Simulink are compared and analyzed with the conventional topology. Finally, the experiments are carried out by designing a 150 W laboratory prototype where the peak efficiency is found 90% while delivering 80 W power to the load side.

Automated summary

This paper presents an improved quadratic DC-DC boost converter with a switched-capacitor cell based structure to achieve an ultra-high voltage gain. The proposed converter eliminates the need for a voltage doubler circuit, resulting in fewer components compared to conventional topologies. It offers reduced voltage stress on components and allows for a high voltage gain effect with a low duty cycle. The paper also includes performance analysis, power loss calculations, simulation results, and experimental validation.