PROJECT TITLE :

A Modified Series-Capacitor High Conversion Ratio DCÐDC Converter Eliminating Start-Up Voltage Stress Problem - 2017

ABSTRACT:

During this letter, a changed series-capacitor (SC) high conversion ratio (HCR) dc-dc converter is proposed. The proposed converter inherits most of the advantages of the prevailing SC HCR dc-dc converter and can eliminate the matter of high switch-voltage stress of the prevailing converter encountered during start-up employing a simple circuit modification. Although an additional capacitor is needed in the proposed converter, total series capacitance of the proposed converter is the same as that of the conventional SC converter. In addition, input capacitance of the proposed converter can be reduced by but half of that of the SC buck converter. A one-kW prototype converter is constructed and tested to verify the performance of the proposed converter.