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High-efficiency current-doubler rectifier with low output current ripple and high step-down voltage ratio

Authors

  • Cheng-Tao Tsai,

    Non-member, Corresponding author
    1. Department of Electrical Engineering, National Chin-Yi University of Technology, No. 35, Lane 215, Sec. 1, Chung-Shan Road, Taiping City, Taichung County 411, Taiwan
    • Department of Electrical Engineering, National Chin-Yi University of Technology, No. 35, Lane 215, Sec. 1, Chung-Shan Road, Taiping City, Taichung County 411, Taiwan
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  • Chih-Lung Shen

    Member
    1. Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, No. 1 University Road, Yuanchau, Kaohsiung 811, Taiwan
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Abstract

This paper presents a current-doubler rectifier with low output current ripple and high step-down voltage ratio. In the proposed rectifier, two extra inductors are introduced to extend the duty ratio of the switches, which in turn reduces the peak current through the isolation transformer as well as the output current ripple; two extra diodes are used to provide discharge paths for the two extra inductors. To highlight the merits of the proposed rectifier, its performance indexes, such as voltage gain function, secondary winding peak current of the isolation transformer, and output current ripple, are analyzed and compared with the conventional current-doubler rectifier. In this paper, a zero-voltage-switching phase-shift full-bridge converter with the proposed rectifier with an input voltage of 400 V, output voltage of 12 V, and full load power of 500 W has been implemented and verified, and experimental results have shown that 90% conversion efficiency could be achieved at full load. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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