节能焊机的研究与应用,是目前世界各国极其重视的一项工作。大约二十年前,静止直流弧焊机开始向传统的旋转直流弧焊机挑战,揭开了这项工作的序幕。而今天,各种不同方法的 MIG—MAG 焊接正在取代传统的手工电弧焊接。形成了节能电焊机研究的一个方向。在 MIG—MAG 焊接的研究领域中,又一支异军突起,这就是引入注目的 QH—ARC 电弧控制法。廿年前人类对于焊接电弧的控制还是处在被动和无能为力的状态。焊机一旦设计制造完成,其性能指标,特别是动态性能就已 Research and application of energy-saving welder is one of the tasks that attach great importance to all countries in the world at present. About twenty years ago, the stationary DC arc welder began to challenge the traditional rotary DC arc welder and opened the curtain on this work. Today, different methods of MIG-MAG welding are replacing traditional manual arc welding. Formed a energy-saving welding machine in one direction. In the field of MIG-MAG welding, another one is emerging, which is the introduction of the attention of the QH-ARC arc control method. Twenty years ago human control of the welding arc is still passive and powerless state. Once the design and manufacture of welding machine is completed, its performance indicators, especially the dynamic performance already