Partial Power Processing using a Flyback Converter: Design and Comparison

PPP (Partial Power Processing) involves designing a converter that splits the processed power between two converters: one with a fixed conversion ratio and high efficiency, and the other with a variable conversion ratio and lower efficiency. Although the potential of this class of converter can be highly effective, it is not suitable for all applications. Literature lacks consistent terminology and clear definitions of which converter topologies perform true PPP. Some papers analyze the PPP as a general concept, others comparing specific conversion topologies. This paper aims to test a flyback converter prototype in the two layouts, explaining efficiency variations through advanced modeling and design methods. As expected, the partial power converter outperforms the full power converter. Performance is evaluated in terms of semiconductor component stress, snubber circuit impact, and overall efficiency.