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LI Guojin1, WEI Xi1, WANG Zhenmin2, XUE Jiaxiang2, CHEN Yanming1. An integrated magnetic full-bridge LLC soft-switching welding power supply[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(7): 119-122. DOI: 10.12073/j.hjxb.20150710001
Citation: LI Guojin1, WEI Xi1, WANG Zhenmin2, XUE Jiaxiang2, CHEN Yanming1. An integrated magnetic full-bridge LLC soft-switching welding power supply[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(7): 119-122. DOI: 10.12073/j.hjxb.20150710001
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An integrated magnetic full-bridge LLC soft-switching welding power supply

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  • Received Date: July 09, 2015
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  • By placing the windings in the outer leg of EE cores, the magnetizing inductor and leakage inductance of highfrequency transformer designed with suitable windings and air gap can meet the requirement of parameters for LLC converter. And the two inductors of LLC converter and the high-frequency transformer can be integrated in one EE core, so the number of magnetic components can be decreased, and the power conversion efficiency and power conversion density can be increased. Meanwhile, because of the integrated magnetic LLC resonant technique, the ZVS turn-on can be achieved for the primary side power switch, and the ZCS turn-off can be achieved for the secondary side rectifier diodes under the whole load ranges. The converter losses can be decreased dramatically. Finally, a welding power supply prototype with 2.5 kW constant voltage output was developed. The experimental results show the performance of integrated magnetic LLC converter was improved.
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  • Zhiyuan Hu,Yan-Fei Liu,P C Sen．Bang-bang charge control forLLC resonant converters[J].IEEE Transactions on Power Electronics,2015,30(2): 1093-1108.[2] Gang Yang,Dubus P,Sadarnacxiang D.Double-Phase high-efficiency,wide load range high-voltage/low-voltage LLC DC/DC converter for electric/hybrid vehicles[J].IEEE Transactions on Power Electronics,2015,30(4): 1876-1886.[3] Feng W,Lee F C,Mattavelli P.Simplified optimal trajectory control (SOTC) for LLC resonant converters[J].IEEE Transactions on Power Electronics,2013,28(5): 2415-2426.[4] Feng W,Lee F C,Mattavelli P.Optimal trajectory control of burst mode for LLC resonant converter[J].IEEE Transactions on Power Electronics,2013,28(1): 457-466.[5] Chen Shihyu,Zhu Rongli,Chen Chernlin.Analysis and design of single-stage AC/DC LLC resonant converter[J]．IEEE Transactions on Industrial Electronics，2012，53(3)：1538-1544.[6] 陈延明，王会雄，王振民，等.一种全桥LLC软开关焊接电源[J].焊接学报，2014，35(5): 9-12． Chen Yanming,Wang Huixiong,Wang Zhenmin.A full-bridge LLC resonant soft-switching welding power supply[J].Transactions of the China Welding Institution，2014，35(5): 9-12．[7] 陈延明，杨美珍，王振民，等.一种半桥LLC谐振软开关焊接电源[J].焊接学报，2013，34(12): 13-16． Chen Yanming,Yang Meizhen,Wang Zhenmin,etal.A full-bridge LLC resonant soft-switching welding power supply[J].Transactions of
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