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研究了逆变式CO2 弧焊电源中输出铁磁电感的作用 ,从理论上分析了用电子电抗器取代传统铁磁电抗器的方式 ,并对减小铁磁电感至最小值的约束条件进行了理论分析和试验研究。结果表明 ,铁磁电感在逆变式CO2 焊机中的作用不同于其在传统晶闸管整流焊机中的作用。焊机理想的动特性可以通过选择合适的电子电抗器获得 ,电感对短路峰值电流和燃弧能量影响不大。但是 ,铁磁电感对抑制瞬时短路产生飞溅有重要意义。采用短路初期分频方式可以抑制电流过冲 ,但电感过小 ,回路的时间常数很小 ,在发生瞬时短路分频或燃弧初期有可能导致断弧。
The effect of output ferromagnetic inductance in inverter CO2 arc welding power supply is studied. The way of replacing traditional ferromagnetic reactor with electronic reactor is theoretically analyzed, and the constraint of reducing the minimum value of ferromagnetic inductance Theoretical Analysis and Experimental Research. The results show that the role of ferromagnetic inductors in inverter CO2 welding machine is different from its role in the traditional thyristor rectifier welding machine. The ideal dynamic characteristics of the welding machine can be obtained by selecting the appropriate electronic reactor. The inductance has little effect on the short-circuit peak current and the arcing energy. However, ferromagnetic inductors to suppress short-circuit splash is of great significance. The use of short-circuit initial frequency division can inhibit current overshoot, but the inductance is too small, the circuit time constant is small, in the event of an instantaneous short-circuit frequency or arc may lead to arc-breaking.