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ZVS Converter With Parallel Connection in Primary Side and Series Connection in Secondary Side

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2 Author(s)
Bor-Ren Lin ; Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Douliou, Taiwan ; Huei-Yuan Shih

This paper presents an active snubber dc/dc converter to realize the zero voltage switching of power switches. Thus, the switching losses on power switches can be reduced. The primary windings of two transformers are connected in parallel to reduce the transformer current stresses. To reduce the transformer secondary winding turns at high-output-voltage applications and distribute output power to two transformers, two transformer secondary windings are connected in series. Thus, the transformer primary currents are automatically balanced. A full-wave diode rectifier is used at the secondary side to realize full-wave rectification at the output side and reduce voltage stress on rectifier diodes. Finally, the performance of the proposed converter is evaluated on a 600-W (400 V/1.5 A) laboratory prototype.

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Industrial Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 4 )