High Efficiency Step-Down Flyback Converter Using Coaxial Cable Coupled-Inductor

Do-Hyun Kim; Joung-Hu Park

High Efficiency Step-Down Flyback Converter Using Coaxial Cable Coupled-Inductor

Do-Hyun Kim

Joung-Hu Park

Vol. 13, No. 2, pp. 214-222, Mar. 2013

10.6113/JPE.2013.13.2.214

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Abstract

This paper proposes a high efficiency step-down flyback converter using a coaxial-cable coupled-inductor which has a higher primary-secondary flux linkage than sandwich winding transformers. The structure of the two-winding coaxial cable transformer is described, and the coupling coefficient of the coaxial cable transformer and that of a sandwich winding transformer are compared. A circuit model of the proposed transformer is also obtained from the frequency-response curves of the secondary short-circuit and of the secondary open-circuit. Finally, the performance of the proposed transformer is validated by the experimental results from a 35W single-output flyback converter prototype. In addition, the proposed two-winding coaxial transformer is extended to a multiple winding coaxial application. For the performance evaluation of the extended version, 35W multi-output hardware prototype of the DC-DC flyback converter was tested.

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Cite this article

[IEEE Style]

D. Kim and J. Park, "High Efficiency Step-Down Flyback Converter Using Coaxial Cable Coupled-Inductor," Journal of Power Electronics, vol. 13, no. 2, pp. 214-222, 2013. DOI: 10.6113/JPE.2013.13.2.214.

[ACM Style]

Do-Hyun Kim and Joung-Hu Park. 2013. High Efficiency Step-Down Flyback Converter Using Coaxial Cable Coupled-Inductor. Journal of Power Electronics, 13, 2, (2013), 214-222. DOI: 10.6113/JPE.2013.13.2.214.