Digital control TIG welding system with high frequency pulse assembled and process properties

The high frequency current pulse(≥ 20 kHz) output is difficult to achieve because of dynamic characteristic limit. The digital control TIG welding system with high frequency pulse assembled has been proposed in this research. This system adopts novel power circuit with DSP and CPLD control. By which the system can achieve high frequency pulse welding according to special scheduling and external characteristic control. This stable welding processing can decrease the number of blowholes during aluminum alloy welding,increase grain refining efficiency and improve the performance of welding joint.A novel high quality welding heat source has been created