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A single-stage power factor correction AC/DC converter based on zero voltage switching full bridge topology with two series-connected transformers

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4 Author(s)
Tae-Sung Kim ; Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Gwan-Bon Koo ; Gun-Woo Moon ; Myung-Joong Youn

A single-stage power factor correction ac/dc converter based on zero voltage switching (ZVS) full bridge topology with two series-connected transformers is proposed in this paper. The proposed converter offers a very wide ZVS range due to the configuration of two series-connected transformers. It features a high efficiency over wide load ranges. Furthermore, it shows the low voltage stress on a dc link capacitor. The proposed converter also gives the high power factor and low input current harmonics complied with IEC 61000-3-2 Class D requirements by integrating a boost stage operated in a discontinuous current mode. The ZVS conditions, large signal modeling, and design procedure are discussed in detail. Experimental results are presented to show the validity of the proposed converter.

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Power Electronics, IEEE Transactions on  (Volume:21 ,  Issue: 1 )