... electrodes and other electrode for welding low carbon steel, carbon steel, alloy steel, etc.; Advanced inverter technology: Inverter frequency up to 100KHz, conversion ... Modulator, closed loop control system to ensure the machine is stable; Excellent welding performance: dynamic characteristics of a good, little spatter ... MM)535*285*385535*285*385 One pcb dc arc inverter welding machine MMA-250I(IGBT)