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陈延明, 王会雄, 王振民, 薛家祥, 李国进. 一种全桥LLC软开关焊接电源[J]. 焊接学报, 2014, 35(5): 9-12.
引用本文: 陈延明, 王会雄, 王振民, 薛家祥, 李国进. 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, XUE Jiangxiang, LI Guojin. A full-bridge LLC soft-switching welding power supply[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(5): 9-12.
Citation: CHEN Yanming, WANG Huixiong, WANG Zhenmin, XUE Jiangxiang, LI Guojin. A full-bridge LLC soft-switching welding power supply[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(5): 9-12.

一种全桥LLC软开关焊接电源

A full-bridge LLC soft-switching welding power supply

  • 摘要: 采用变压器的励磁电感,隔直电容,变压器的漏电感和绕制的附加电感构成全桥LLC变换电路,实现一种平特性的软开关全桥焊接电源.结果表明,在整个负载工作范围内,电路工作在两个谐振频率之间,功率开关实现零电压开通,整流二极管的实现零电流关断;整个电路可以工作在更高的开关频率,功率密度高,损耗小,效率高,特别适合在大功率场合.文中讨论了其工作原理,制作3.2 kW焊接电源,并给出试验结果.

     

    Abstract: By utilizing the transformer magnetizing inductor, DC block capacitor,leakage inductance and the auxiliary inductor, a full-bridge LLC soft-switching welding power supply with constant output voltage was proposed. Because the converter was operated between the two resonant frequency in the whole load range,the zero voltage switching(ZVS) turn-on can be achieved for primary side power switch,and the zero current switching(ZCS) turn-off can be achieved for secondary rectifier diodes. The converter can be operated in higher frequency,with high density,lower losses and high efficiency,hence it is especially suitable for the high power applications. Moreover,the operation principles were discussed as well. Finally,a 3.2 kW welding power supply prototype had been implemented,and the experimental results were also presented.

     

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