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为满足生产上的需要,我厂四连革命职工,把 BS—500型交流焊机改制成直流焊机,经生产实践证明,效果满意,它具有电弧稳定、焊接质量高、造价低廉、改制和维修简便的特点。改制后的电路图如图1所示。在 BS500焊机的输出端加接一套单相桥式硅整流电路,最大电流为700安,每个桥臂上用两个2 CZ200A/200v 的硅二极管并联使用。为保证并联管子的负荷平衡,挑选正向压降相近似的管子配对,并在每只管子
To meet the needs of production, I plant four revolutionary workers, the BS-500 AC welding machine into DC welding machine, the production proved to be satisfactory, it has the arc stability, high quality welding, low cost, restructuring and Easy maintenance features. Restructuring the circuit shown in Figure 1. Add a set of single-phase bridge silicon rectifier circuit in the output of BS500 welder, the maximum current is 700A, each bridge arm with two 2 CZ200A / 200v silicon diodes in parallel. In order to ensure the load balance of the parallel pipes, the pipes with the similar forward voltage drop are selected and matched with each pipe