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A Flexible Converter With Two Selectable Topologies

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3 Author(s)
Yilei Gu ; Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China ; Lijun Hang ; Zhengyu Lu

In order to satisfy the requirement of wide adaptability for standard power modules in the scheme of power electronics system integration, a novel conception of flexible converter is proposed. Next, a practical case of flexible converter with two selectable topologies based on LLC resonant converter with frequency modulation is also proposed. This converter can operate under two various topologies to satisfy various applications only by altering the connecting mode of the output pins. This converter is suitable for two applications of V/I output and 2V/(I/2) output and the voltage stresses and current stresses of all main components are peer to peer under these two applications. The design considerations of small-signal, electromagnetic compatibility, and layout for the flexible converter are also discussed. A prototype with selectable output of 110 V/10 A and 220 V/5 A is built to verify the aforementioned analysis and the highest efficiency is above 96%.

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Industrial Electronics, IEEE Transactions on  (Volume:56 ,  Issue: 12 )