通过对脉冲MIG焊的具体分析，对BUCK变换器中的相关控制方法在弧焊逆变器中应用的可行性和存在的困难进行了讨论。
By the detail analysis of pulse MIG welding, the possibility and the question in the relative control method of BUCK inverter to be used in arc welding inverter are discussed.
文中叙述了直流—直流变换器或直流—交流逆变器输入电流中纹波电流的二种测量方法。
The paper gives two kinds of approaches to measure the ripple current in input current of DC-DC converter or DC-AC inverter.
以逆变器输出的电压和220v的差值作为控制信号。设计控制器根据控制信号改变直流变换器和三相可控整流的PWM控制信号。
The difference of output voltage of inverter and 220v is set as control signal, controller change the PWM signal to regulate buck-boost converter and three-phase rectifier.
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