一、前言晶体管弧焊电源是七十年代出现的一新型弧焊电源,它的出现引起了各国焊接界的普遍重视,因此发展很快。目前,晶体管弧焊电源多采用模拟电阻式的控制方式。这种控制方式的特点是,电磁惯性小,反应快,动态品质优良,频响特性宽,其次是输出静特性根据工艺需要可以连续调节;第三,焊接过程的规范参数调节精度高,易于控制,可以输出任意的电流波形。第四, I. Introduction Transistor arc welding power source is a new type of arc welding power source appeared in seventies. Its appearance has aroused the universal attention of all countries in the world of welding, so the development is fast. At present, the transistor arc welding power supply more use of analog resistive control. This control mode is characterized by small electromagnetic inertia, fast response, dynamic quality, wide frequency response, followed by the output static characteristics can be continuously adjusted according to process needs; Third, the normative parameters of the welding process of high precision and easy to control , You can output any current waveform. fourth,