【摘要】 根据 CO2 焊短路过渡的特点 ,对其过程进行细分 ,利用 IGBT响应速度快且易于控制的特点 ,在焊接电源的直流侧 ,利用单片机直接控制 IGBT工作于开关状态 .利用定频调宽和闭环控制 ,实时准确地检测 CO2 焊短路时刻和熔滴颈缩时刻的电弧参数值 ,输出符合 CO2 焊短路过渡细分各阶段的电流电压波形更多还原

【Abstract】 In terms of the character of short circuit of CO 2 welding, the process is divided into subsections, and by using the characters of IGBT, swift responding and easy controlling, at the fan out of DC,IGBT is made to works in a on off status with controlling of a single chip. To transmit the wave shape of current and voltage which is suitable for each step of the CO 2 short circuit subsection ,the principle of PFM and closed loop control are used . At the time of short circuit and shrinking neck of melting drop, the arc values are obtained in real time.更多还原