Analysis and Comparison of Isolated Converter based Step-Down Partial Power Processing Configurations

Chao Liu*, Zhe Zhang, Ziwei Ouyang, Michael A.E. Andersen, Tiberiu Gabriel Zsurzsan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


This paper presents an analysis and comparison of step-down (SD) partial power processing (PPP) configurations based on the isolated dc-dc converter. The possible PPP configurations for SD system are analyzed based on the analysis of the port voltage of the converter. As a result, three basic SD PPP configurations and their regulation range were derived, where one type (SD-1) achieves PPP when voltage gain (Kv) is less than 0.5 and ther other two types (SD-2 and SD-3) achieve PPP at 0.5 < Kv <1. Furtherly, a comparative analysis of the two SD PPC configurations based on component stress factor (CSF) is performed to determine the optimal solution for a given system. Moreover, the effects of the transformer on the CSF are analyzed. Two different SD PPP configurations based on the same converter are designed, built and tested. Experimental results prove that SD-3 type configuration has fewer CSF than SD-2 configuration, resulting in higher efficiency (exceeds 99% overall entire output voltage).

Original languageEnglish
Title of host publicationProceedings of 2022 International Power Electronics Conference
Publication date2022
ISBN (Electronic)9784886864253
Publication statusPublished - 2022
EventInternational Power Electronics Conference 2022 - Himeji City Culture and Convention Center, Himeji, Japan
Duration: 15 May 202219 May 2022
Conference number: 9


ConferenceInternational Power Electronics Conference 2022
LocationHimeji City Culture and Convention Center
Internet address


  • Component stress factor
  • High efficiency converter
  • Partial power converter
  • Step down voltage regulation


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