晶闸管整流弧焊机引弧及其数字控制设计

摘要

针对直流电焊机引弧的工作环境和特点,分析了在焊接时采用旁路引弧的方法,同时在焊接时对焊机输出的电压、电流采样,并进行数字控制运算,适时稳定地控制焊机输出的电压、电流.其实现方法是采用C8051芯片处理器控制整个焊机的性能和功能,同时通过对负载电压、电流的采样进行双闭环控制.通过理论分析,实验验证了该焊接系统能根据焊接工艺要求设定输出焊接的电压、电流值,系统性能稳定、运行可靠,能提高焊接质量.%For the feature of arc ignition in the DC electric-welding,to analyzing bypass arc ignition way and To sampling output current and voltage of load and digital control to current and voltage. It is use MCU to control performance and function in the welding. Use C8051 to control its performance and function. Finally,the experiments prove that the rectifier can have good precision.The control method can not only realize the functions of the whole system,but also mn more precisely and steadily. Improved quality of welding.