An interleaved single-input multiple-output dc-dc converter combination

Abstract

This paper analyses, simulates and verifies an experimental prototype of a four-phase interleaved DC-DC converter. It \nis based on a SEPIC-Cuk combination. The developed prototype ´ \nhas been used in single-input multiple-output (SIMO) applications. This combined converter allows obtaining dual output \nvoltages of the same value, from a single input DC voltage \nand with only a power switch. Multiphase interleaved DC-DC \nconverters achieve a better dynamic response and low ripple, \nmaintaining their efficiency. Each converter is connected in parallel, thereby managing their losses by distributing them between \nmore components, which facilitates the thermal management of \nthe multiphase converter and allows handling high power values \nin small sizes with respect to solutions for a single phase. Two \ncontrol strategies were applied: synchronous operation mode \n(SOM) and interleaved operation mode (IOM). The simulation \nresults allow the comparison of both operational modes, verifying \nthat the IOM presents advantages with respect to the ripple at \nthe input and output currents. The experimental prototype was \ndesigned for a distributed power architecture and bipolar DC \nmicrogrid (MG)