Abstract: This paper describeis the basic principle, composition of control circuit and construction of control software of intelligent controller for the robotic are welding inverter and equipment. The experimental results show that MOSFET are welding inverter power sources can be directly numeral controlled by 8097BH single-chip microcomputer, stastistic and dynamic characters and welding sequences for CO2/MAG automatic welding can be conveniently achieved, diagnosis of the welding process faults and alarming can be realized, welding parameters can be changed, adjusted, stored and called. Besides, it makes a complete welding system with the are welding inverter, wire feeder and torch, and has only on/off relationship with the robotic control cabinet. By changing PI parameters, the dynamic character of inverter can be adjusted, this makes the welding process stabler, spatter less, welding appearance better, shows more advantages of robotic welding methods.

Key words: Arc welding, Intelligent control, Inverter, Robot