Wide voltage input's IGBT single tube contravariant manual welding machine and circuit thereof

The utility model relates to a technical field of contravariant welding machine, specific saying is a wide voltage input's IGBT single tube contravariant manual welding machine and circuit thereof, the utility model discloses a IGBT single tube bridge type contravariant control divides division mode of arranging with control circuit and power circuit, reaches the non -interfering purpose, is listed as median septum both sides, the heat dissipation purpose of maxmizing, higher stablizing output current and weld cyclic duration factor with IGBT radiator and the two major module branches that generate heat of MUR output Rectifier diode radiator, adopt pin sheath dual mode to solve dustproof performance problem, after avoiding effectively that the welding machine is long -term and using some contain the conductive metal dust and adsorb and make creepage interval diminish between the components and parts between the IGBT pin, on the circuit board, have improved the reliability of welding machine work, improved the