论文部分内容阅读
通常是利用具有陡降外特性的焊接变压器作为铝及其合金的不熔化极焊接电源。钨极和铝工件之间的电弧的导电率与电流的方向有关,因此,交流电半周期相对于零线就不对称了,从而就出现了电流的直流分量。这个直流电流流过变压器的二次绕组。这种直流分量的产生就使得变压器的磁化电流显著地加大,使变压器二次绕组的感应电势波形畸变,数值降低,其结果会影响电弧燃烧的稳定性。因此,通常的情况是设法完全消除二次绕
It is common to use welding transformers with steep drop characteristics as the non-melting pole welding power source for aluminum and its alloys. The electrical conductivity of the arc between the tungsten pole and the aluminum work piece is related to the direction of the current, so that the half-cycle of the alternating current is asymmetrical with respect to the zero line, so that the direct current component of the current appears. This DC current flows through the secondary winding of the transformer. This DC component makes the magnetizing current significantly increased transformer secondary winding induced voltage waveform distortion, the numerical decrease, the results will affect the stability of the arc combustion. Therefore, the usual situation is to try to completely eliminate the secondary winding