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在薄板小电流电弧焊的过程中，影响焊接质量的一个重要因素就是电弧的稳定性．本文介绍一种用于薄板TIG焊的逆变电源，该电源的输出控制采用强的非线性调节环节与弱的PID环节相结合处理反馈信号并以PWM和PFM混合调制的方式来进行．输出滤波电感采用比较独特的摆动电感结构，提高了电弧的稳定性．电源的引弧为PFM降频调制的接触引弧方式，引弧过程可靠且不烧损钨极．通过对高频道变脉冲的低频调制达到控制线能量的目的．
In the process of thin-plate arc welding, an important factor affecting the welding quality is the stability of the arc. In this paper, an inverter power supply for TIG welding is introduced. The output of the power supply is controlled by a combination of strong non-linearity and weak PID. The feedback signal is processed by mixed PWM and PFM modulation. Output filter inductor using a more unique structure of the wobble inductance to improve the stability of the arc. Pilot arc power PFM down-modulation of the contact arc way, the pilot arc process is reliable and does not burn tungsten. Through the high-frequency pulse of low-frequency modulation to achieve the purpose of the control line energy.