Digital welding machine now becomes more and more popular,it adopts DSP as controlling kernel for triggering the main circuit of the new kind of twelve-phase SCR CO 2 shielded welding machine.

• 介绍了一种晶闸管弧焊电源用新型无同步变压器的同步控制电路,实现了对自然换相点的精密同步控制,并能跟踪自然换相点的漂移,克服了传统同步控制电路的不足。