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该文分析了PMIG焊机的动态调节原理与过程，设计了电弧跳台阶和爬坡实验，研究了孤长快速变化时焊机的动态响应过程。电弧上跳台阶实际是一个电弧拉长、跳侧壁再跳阶顶的过程，由于台阶的下塌下跳台阶实际是下坡过程，焊机对弧长急速变化的响应迅速，跳8mm台阶的调节过程约需600ms，焊缝成形良好。电弧爬坡时电流的频率不断调整以适应新的弧长，调节过程实际是频率不断波动上调的动态稳定过程，进行35°上坡焊时电弧异常平稳。
In this paper, the principle and process of dynamic adjustment of PMIG welder are analyzed. Arc jump steps and climbing experiments are designed and the dynamic response of welder is studied. The arc on the jump is actually an arc stretching the length of the jump side of the wall and then jumping the top of the process, as the step down the stairs is actually downhill step down process, the rapid changes in the arc length of the welding machine rapid response, jumping 8mm steps Adjustment process takes about 600ms, the weld is well formed. When the electric arc is climbing, the frequency of the electric current is continuously adjusted to adapt to the new arc length. The adjustment process is actually the dynamic stabilization process with the frequency fluctuating constantly rising, and the arc is stable at 35 ° uphill welding.