Characteristic Testing and Experiment to Alternating Current Square Wave Submerged Arc Welding Inverter

Based on the second inverting main circuit topology, a high-power alternating current square wave submerged arc welding power source is developed by combining limiting current and inverting parallel connection technology. The proposed inverting power source was tested and done technologic experiment. The results indicated that the novel power source can be used in thick wire or the multi-wires highly effective submerged arc automatically welding well because it possesses characteristics as follows: the novel power source were good external characteristics, excellent dynamic performance, quick speed of alternating polarity and good stabilisation of welding process, the shape of welding joint is smoothly and artistic.