CCTT-core split-winding integrated magnetic interleaved boost converter for renewable energy applications

This paper presents a comparison of two magnetic component topologies for use in high-current renewable energy applications. A two-phase (2L) interleaved dc-dc boost converter consisting of discrete toroid magnetic components is considered as the baseline design. A 3C92 CCTT-core split-winding integrated magnetic (CCTT IM) is developed and compared for similar conditions. The topologies are compared for the same worst-case phase current ripple conditions. The CCTT IM component is optimized for varying number of turns in order to achieve the minimum boxed volume. Magnetic and semiconductor power loss is investigated. Low-power (8kW) experimental results are presented comparing the 2L and CCTT IM designs. The experimental results indicate that the CCTT IM component allows for a 50 % reduction, in mass and boxed volume, with respect to the baseline 2L design. Critically, this size saving does not come at the expense of reduced efficiency, and the CCTT IM is seen to be as or more efficient as the 2L baseline design.