中文摘要：

根据大电流交流方波埋弧焊的工艺要求，将逆变并联技术、双闭环控制技术以及嵌入式控制技术相结合，研制了大功率埋孤焊交流方波逆变电源．应用弧焊负载测试平台对所研制的电源进行了外特性测试，并进行了工艺实验．结果表明，该电源具有良好的静、动态性能，电流过零速度快，而且焊接过程稳定，焊缝光滑、美观，完全可以满足埋弧焊技术要求．

英文摘要：

In order to meet the requirements of the AC square-wave submerged arc welding with high current, a high-power AC square-wave inverter, which combines the parallel inverter technology, the double closed-loop control technology and the embedded control technology, was developed. Then, the external characteristics of the developed inverter were tested at the testing platform for arc welding load, and some experiments were carried out. The results indicate that the developed inverter fully meets the requirements of the submerged arc welding because it helps to obtain smooth and perfect welding seam with excellent dynamic and static characteristics, high speed of current zero-crossing and good stability.