Soft-switching inverting high-speed double wire pulsed welding equipment based on DSP

By combining pulsed welding,soft-switching inverting,digital embedded control and the CAN bus communi-cation technology et al.,a synergic controlled tandem high-speed double wire pulsed welding equipment is designed.A novel to-pology by adopting saturable inductor and fully utilizing the mag-netic inductance to widen soft-switching range was proposed.To meet the requirements of double wire pulsed arc shape,globular transfer mode,external and dynamic characteristics of power supply,the double closed-loop control system was presented based on peak-current mode,the preemptive and embedded con-trol system was also designed based on DSP and μC/OS-Ⅱ.The synchronic control of different phase status for the output in high speed double wire pulsed welding process was realized with the application of CAN bus communication technology,which in-cluded synchronization,alternation and random.Experiments show that all the electric performances meet the design require-ments,and obviously show the merits of high-speed welding such as the stable welding process,perfect welding seam,little splash and small deformation.