4.8 Article

Investigation of the Integrated-Transformer Winding Architectures in the Input-Series Flyback Auxiliary Power Supply Considering the Stray Capacitances

期刊

IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 36, 期 2, 页码 1790-1803

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.3007887

关键词

Windings; Capacitance; Buck converters; Inductance; Flyback transformers; Power supplies; Stress; Input-series; integrated-transformer; stray capacitance; two-transistor flyback; windings arrangement

资金

  1. National Natural Science Foundation of China [51677056]
  2. Natural Science Foundation of Heilongjiang Province [LH2019E075]
  3. Heilongjiang University Fundamental Research Funds for the Heilongjiang Province Universities [RCYJTD201802]

向作者/读者索取更多资源

This study focused on input-series converters based on integrated-transformers and investigated the impact of winding arrangements on stray capacitance effects. The design effectiveness of integrated-transformer was verified through theoretical analysis and experimental study.
The input-series converters based on integrated-transformer are suitable for the high-input voltage multiple-output applications. In these converters, the integrated-transformer is an important device, through which active input voltage sharing of each series-module is achieved. Aiming at this type two-transistor flyback converter, stray capacitances effects of the integrated-transformer are analyzed, based on which windings arrangements of the integrated-transformer are investigated in this article. First, the conventional and input-series flyback converters are presented, and design principle of the integrated-transformer is introduced. Second, the main stray capacitances of the integrated-transformer and their influences are analyzed in detail. Third, various windings arrangements of the integrated-transformer are analyzed and compared. Finally, experimental study has been done on two laboratory-made prototypes with various integrated-transformers, and the theoretical analysis is verified by the experimental comparisons.

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