铁路局专用230A发电电焊两用机价格/报价  直流电焊机与交流电焊机的区别？都是靠短路电弧来进行焊接的，但直流焊更稳定，用于要求高的场合：
The difference between the dc arc welding machine and ac arc welder? Are to be carried out by a short circuit arc welding, but more stable dc welding, used in occasions with higher requirements: 
一、直流电焊机输出的电流没有“过零点”，不易断弧，电弧稳定，这是它zui大的优点。铁路局专用230A发电电焊两用机价格/报价 
A, dc electric welding machine output current is not "zero", not easily broken arc, arc stability, this is it zui big advantages.  
二、变压器二次电压峰值一定，直流电焊机比交流电焊机空载电压高，更容易引弧。
Second, the transformer secondary voltage peak must be, dc arc welding machine is higher than ac arc welder no-load voltage, arc more easily.  
三、直流电焊机比交流电焊机多出整流部分，成本要稍高一些。
Three more than ac arc welding machine, dc welding machine rectifier part, the cost is somewhat higher.  
四铁路局专用230A发电电焊两用机价格/报价 、大功率的交流电焊机由于zui多只能用到两相电，所以容易造成三相用电不平衡，而大功率的直流电焊机都用三相整流就没有这个问题。
Four, high-power ac arc welder as zui can only use two phase more electricity, so easy to cause the unbalanced three-phase power, and high power dc arc welding machine with three-phase rectifier is not the problem.  
五、焊条使用跟焊接材料有关而跟焊机无关。
Five, the electrode using associated with welding material and has nothing to do with welding machine. 

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