Analysis, Design, and Implementation of a Soft-Switched Active-Clamped Forward Converter with a Current-Doubler Rectifier

Paul Jang; Hye-Jin Kim; Bo-Hyung Cho

Analysis, Design, and Implementation of a Soft-Switched Active-Clamped Forward Converter with a Current-Doubler Rectifier

Paul Jang

Hye-Jin Kim

Bo-Hyung Cho

Vol. 16, No. 3, pp. 894-904, May 2016

10.6113/JPE.2016.16.3.894

Active-clamp circuit

Current-doubler rectifier

Forward converter

Zero-voltage switching

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Abstract

This study examines the zero-voltage switching (ZVS) operation of an active-clamped forward converter (ACFC) with a current-doubler rectifier (CDR). The ZVS condition can be obtained with a much smaller leakage inductance compared to that of a conventional ACFC. Due to the significantly reduced leakage inductance, the design is optimized and the circulating loss is reduced. The operation of the ACFC with a CDR is analyzed, and a detailed ZVS analysis is conducted on the basis of a steady-state analysis. From the results, a design consideration for ZVS improvement is presented. Loss analyses of the converters shows that enhanced soft-switching contributes to an efficiency improvement under light-load condition. Experimental results from a 100-W (5-V/20-A) prototype verify that the ACFC with a CDR can attain ZVS across an extended load range of loads and achieve a higher efficiency than conventional ACFCs.

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Cite this article

[IEEE Style]

P. Jang, H. Kim, B. Cho, "Analysis, Design, and Implementation of a Soft-Switched Active-Clamped Forward Converter with a Current-Doubler Rectifier," Journal of Power Electronics, vol. 16, no. 3, pp. 894-904, 2016. DOI: 10.6113/JPE.2016.16.3.894.

[ACM Style]

Paul Jang, Hye-Jin Kim, and Bo-Hyung Cho. 2016. Analysis, Design, and Implementation of a Soft-Switched Active-Clamped Forward Converter with a Current-Doubler Rectifier. Journal of Power Electronics, 16, 3, (2016), 894-904. DOI: 10.6113/JPE.2016.16.3.894.