基于数字信号处理器的双丝高速焊数字化协同控制系统

为解决双丝高速焊两路脉冲同步、交替、随机三种输出形式的协同控制问题，采用数字信号处理器(Digital signal processor, DSP) 建立了基于DSP的双丝高速焊数字化协同控制系统。利用DSP内部集成的脉宽调制 (Pulse width modulation, PWM) 模块，以软件方式实现了主、从机两台逆变电源PWM信号的直接数字化控制，从而实现主、从机的高频逆变和低频脉冲波形调制。利用单一DSP芯片实现了双丝高速焊同步、交替、随机三种脉冲相位输出形式。阐述数字化协同控制系统的软硬件设计。双丝高速焊试验结果表明，所设计的数字化协同控制系统满足设计要求，焊接过程稳定、焊接速度快、飞溅小、焊缝成型美观，能实现良好的双丝高速焊工艺。

DSP Based Digital Synchronic Control System for Twin-wire High Speed Welding

To overcome three different phase status for the waveform output in twin-wire high speed welding process, including synchronization, alternation and random, a DSP based digital synchronic control system for twin-wire high speed welding is presented. By adopting the PWM generation modules integrated in DSP, the digital control of the PWM signal is realized in software mode, so the high frequency inverter and low frequency pulsed waveform modulation of master and slave power supplies are realized. The three different phase status for the waveform output is realized in single chip DSP. The design of hardware and software to the digital synchronic control system is also discussed. The results of welding experiment demonstrate that the developed digital synchronic control system meets the design requirements, and the merits of the twin-wire high speed welding are stable welding process, high welding speed, less splash and perfect weld seam formation.