MC68HC11单片机控制恒频短路过渡逆变式CO_2焊机的研究

Study on Inverler Type CO 2 Welder Controlled by MCU MC68HC11 with Constant Short-Circuit Transfer Frequency

通过建立以ＭＣ６８ＨＣ１１Ａ１单片机为主控ＣＰＵ的双闭环控制系统，采用ＩＧＢＴ逆变式弧焊电源，实现了波控ＣＯ２焊接方法的一元化调节及恒频短路过渡。实验结果表明：该系统焊接过程稳定、焊缝成型美观、飞溅小，同一直径焊丝适用的焊接电源范围宽，且抗干扰能力强。

In this paper,a double closed loop control system based on MC68HC11 is established for IGBT inverter type arc welding power source,and a wave-form contrded CO 2 welding method with one-knob adjustment and constant short-circuit transfer frequency is achieved.The experiment results show that this system has stable welding process,good weld bead,small spatter,wide welding crrent for one wire diameter and strong anti-disturbance ability.So that,it has an excellent spreading value.