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焊接时,为确保焊接质量,常常需要调节焊机的电流。在高空或地下焊接时,要调节焊机的电流是很不方便的。为此可采用焊把电流调节器。现将该调节器的工作原理介绍如下: 焊把电流调节器是在AX3-300型焊机基础上改制而成的。AX3-300直流弧焊机是由他激、并激和串激三个激磁绕组组成的。其电气原理如图1所示。改装时,原焊机的并激和串激绕组不动,只利用他激绕组,另加硅整流器和调压用的可控硅。利用原动机的交流电
Welding, in order to ensure the quality of welding, welding often need to adjust the current. In the high-altitude or underground welding, to adjust the current of the welder is very inconvenient. To this end can be used welding current regulator. Now the working principle of the regulator is introduced as follows: Welding current regulator is based on the AX3-300 welding machine made of. AX3-300 DC arc welding machine is excited by him, and excited and string excited three excitation winding composition. The electrical principle shown in Figure 1. Refit, the original welder and string excitement windings do not move, only use his exciting group, plus a silicon rectifier and thyristor for voltage regulation. Use the prime mover AC