Magnetic controller of buttwelder

The utility model discloses a magnetic controller of welder which comprises a transformer, a guiding track (12), a soft copper belt (6), as well as a group of static fixture (4) and dynamic fixture (9). The utility model is characterized in that: the controller also consists of a sub-level rectifier circuit (7), a wave-chopping device (1), an iron core (2) and magnetic-excitation coils (3). The alternating magnetic field generated by the magnetic-excitation coils (3) enables the metal welding area to bear an alternating magnetic force which causes the heated moulded metal at the welded surface to do left-and-right friction movement and effectively destroys the bad oxide film, refines the crystals and enhances the welding quality. The sub-level rectifier circuit (7) is single-phase circuit or three-phase full-wave circuit or bridge rectifier circuit. Because of the sub-level rectifier circuit, the utility model can significantly enhance the power factor of the welding machine and the three-phase sub-level rectifier circuit can efficiently improve the unbalance state of the electric net, and reduce the impact of the welding machine on the net circuit during the use of the welding machine. The single-phrase circuit of the three-phase bridge rectifier circuit can directly take advantage of the existing technology to improve the transformer of the welding machine so as to reduce the reconstruction cost of the machine.