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A Four-Capacitor Model for Interprimary-Winding Capacitances Analysis in the Input-Series Transformer-Integration Converters | IEEE Journals & Magazine | IEEE Xplore

A Four-Capacitor Model for Interprimary-Winding Capacitances Analysis in the Input-Series Transformer-Integration Converters


Abstract:

The input-series transformer-integration (ISTI) converters are suitable for the high-input voltage multiple-output applications. In these converters, interprimary-winding...Show More

Abstract:

The input-series transformer-integration (ISTI) converters are suitable for the high-input voltage multiple-output applications. In these converters, interprimary-winding capacitances are the unique stray capacitances of the integrated transformer, and energy influences of these capacitances cannot be ignored in the high-voltage applications. In order to analyze energy influences of the interprimary-winding capacitances, in this article, a four-capacitor model is proposed to represent these capacitances within arbitrary two primary windings of the integrated transformer. Based on the proposed model, energy varying of the interprimary-winding capacitances is analyzed in detail during each switching period. Furthermore, estimation of the four lumped capacitors is discussed. Finally, three different integrated transformers are designed for a 1-kV/60-W laboratory-made flyback ISTI converter, and validity of the proposed model is verified through the simulating and the experimental comparisons of these integrated transformers.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 70, Issue: 1, January 2023)
Page(s): 373 - 383
Date of Publication: 09 February 2022

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