Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Stray capacitances influences of various parallel primary windings in input-series transformer-integration flyback converters

  • Junjie Xie (School of Mechanical and Electrical Engineering, Heilongjiang University) ;
  • Yichen Chang (School of Mechanical and Electrical Engineering, Heilongjiang University) ;
  • Tao Meng (School of Mechanical and Electrical Engineering, Heilongjiang University)
  • Received : 2023.02.27
  • Accepted : 2023.07.02
  • Published : 2023.12.20
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Abstract

In this paper, the influences of stray capacitances are explored for various parallel arrangements of primary windings (PWs) in input-series transformer-integration (ISTI) flyback converters. On this basis, selecting the principle of the basic parallel PWs arrangements is clarified in the design process. First, the influences caused by the energy changes of stray capacitances are analyzed for PWs in ISTI converter. Based on this, the arrangements of single PWs and various parallel PWs are presented. Second, the energy influences of both the inner and inter-winding capacitances are analyzed and compared for two basic parallel PWs in an ISTI converter. In addition, selecting the principle of these PWs arrangements is summarized. Finally, four integrated transformers with various PW arrangements are designed, and experimental comparisons are implemented on a 1000 Vdc/48 W ISTI flyback converter. Through the obtained results, the validity of theoretical analysis is verified.

Keywords

Acknowledgement

This work was supported by National Natural Science Foundation of China (51677056), Natural Science Foundation of Heilongjiang Province (LH2021E100), and Basic Scientific Research Projects of Provincial Colleges and Universities in Heilongjiang Province (2022-KYYWF-1110).

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