Improved Quadratic Boost Converter Based on the Voltage Lift Technique

Abstract

The dc-dc boost converter is one of the main components in any solar energy system. However, traditional boost converter cannot meet the demand on higher step-up ratio required of the system. Voltage lift technique has made a great success in improving the dc-dc boost converter design. This technique can largely increase the output voltage step-up ratio stage-by-stage. The quadratic dc-dc boost converter has a higher step-up ratio and also a good power transferring efficiency during continuous conduction mode (CCM). In this paper, the basic quadratic boost converter is modified by the voltage lift technique to further increase the step-up ratio. The mathematical analysis and simulation results presented in the paper will illustrate the capacity and potential value of this improvement.