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http://dx.doi.org/10.6113/JPE.2019.19.5.1122

Analysis and Design of Transformer Windings Schemes in Multiple-Output Flyback Auxiliary Power Supplies with High-Input Voltage  

Meng, Xianzeng (School of Mechanical and Electrical Engineering, Heilongjiang University)
Li, Chunyan (School of Mechanical and Electrical Engineering, Heilongjiang University)
Meng, Tao (School of Mechanical and Electrical Engineering, Heilongjiang University)
An, Yanhua (School of Mechanical and Electrical Engineering, Heilongjiang University)
Publication Information
Journal of Power Electronics / v.19, no.5, 2019 , pp. 1122-1132 More about this Journal
Abstract
In this paper, aiming at high-voltage applications, transformer windings schemes of multiple-output two-transistor flyback converters are investigated, which are mainly based on the stray capacitances effect. First, based on a transformer model including equivalent stray capacitors, the operational principle of the converter is presented, and the main influence of its stay capacitors is determined. Second, the windings structures of the transformer are analyzed and designed based on the stray capacitances effect. Third, the windings arrangements of the transformer are analyzed and designed through a coupling analysis of the secondary windings and a stray capacitance analysis between the primary and secondary windings. Finally, the analysis and design conclusions are verified by experimental results obtained from a 60W laboratory prototype of a multiple-output two-transistor flyback converter.
Keywords
Multiple-output auxiliary power supply; Stray capacitance; Transformer; Two-transistor flyback; Winding arrangement;
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