Stray capacitances influences of various parallel primary windings in input‑series transformer‑integration flyback converters

Junjie Xie; Yichen Chang; Tao Meng

Stray capacitances influences of various parallel primary windings in input‑series transformer‑integration flyback converters

Junjie Xie

Yichen Chang

Tao Meng

Vol. 23, No. 12, pp. 1808-1819, Dec. 2023

10.1007/s43236-023-00678-0

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Input-series transformer-integration

Parallel

Primary windings

Stray capacitance

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.

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Cite this article

[IEEE Style]

J. Xie, Y. Chang, T. Meng, "Stray capacitances influences of various parallel primary windings in input‑series transformer‑integration flyback converters," Journal of Power Electronics, vol. 23, no. 12, pp. 1808-1819, 2023. DOI: 10.1007/s43236-023-00678-0.

[ACM Style]

Junjie Xie, Yichen Chang, and Tao Meng. 2023. Stray capacitances influences of various parallel primary windings in input‑series transformer‑integration flyback converters. Journal of Power Electronics, 23, 12, (2023), 1808-1819. DOI: 10.1007/s43236-023-00678-0.