目前国内生产的 CO_2焊机的变压器,大部分采用“抽头式”,其特点是结构简单,但在选择规范时需要停止焊接,再进行有级调节,较不方便。针对上述问题,我厂在批林批孔运动推动下,经过四个月的努力,在调压方式上进行了改进,实践证明,不但可以无级调节,而且在负载情况下,能进行修正电压参数,使电压更加合理,使用更加方便。调压方式采用波形加减法来实现,其工作原理如下(图1): The current domestic production of CO_2 welding transformers, most of the “tap type”, which is characterized by simple structure, but in the choice of norms need to stop welding, and then level regulation, more inconvenient. In response to the above problems, I plant in Lin approved Kong campaign to promote, after four months of efforts, the pressure regulator on the way has been improved, the practice has proved that not only can be infinitely adjusted, and under load, can be amended voltage Parameters, the voltage is more reasonable, more convenient to use. Regulator method using waveform addition and subtraction to achieve its working principle is as follows (Figure 1):