High Voltage-Gain Interleaved Boost DC-DC Converter with Reduced Capacitance Requirement

This work proposes a high voltage gain DC-DC step-up converter that provides reduction of the capacitance requirements for the dc-link, which allows the replacement of electrolytic capacitors by film capacitors that have a longer lifetime. The topology is an interleaved converter based on the three-state switching cell, in which the output to input voltage ratio can be raised by adding an auxiliary winding to the transformer. For the purpose of verifying the topology implementation viability, this paper presents a theoretical analysis, converter design and simulations results.