基于数字信号处理器控制的气体保护电弧焊电源研制

DIGITAL CONTROLLING FOR GMA WELDING MACHINE BASED ON DSP

介绍了基于数字信号处理器(DSP)控制的气体保护电弧焊电源研制。根据不同工艺及经验的要求通过柔性化的程序达到合适的电源特性,如网压补偿,焊接电压及电流的反馈,送丝机构,可控硅的数字触发等,都能通过数字信号处理进行控制和自调节。随着基于DSP设计的产生将大大减少传统的控制回路,这种设计能够增强焊接电源的稳定性和可靠性。最后,运用CO_2作为保护气体的焊接试验证明了其焊接过程的稳定性。

A welding machine for GMA using digital controlling method based on DSP (digital signal process) is introduced. By means of flexible programming according to welding technologies and experiences, the suitable characteristics of welding machine such as line compensation, welding voltage and current feedback, wire-feed driving, SCR trigging and so on, can be controlled and self-adjusted using digital signals. Through the designing based on DSP it is put out that the traditional hardware of control circuit is decreased greatly which can enhance the stability and reliability of welding machine. Finally, the welding experiments using CO2 shielding gas proves that the welding process is stable.