同步方波交流电源负半波时间随总电流增加而增加的原因  

Revere Polarity Time Increase with Total Current Increase of Syncronouse square Power Source in A.C.Plasma Arc Welding

作　　者：郑兵[1] 王慧钧[1] 王其隆[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《焊接学报》1996年第3期150-155,共6页Transactions of The China Welding Institution

摘　　要：对同步方波交流电源（ＳＹＮＣＲＯＷＡＶＥ－３００（Ｓ）方波交流电源）的负半波时间随总电流增加而增加的原因进行了详细的试验研究和理论分析。结果表明：这种陡降特性的可控硅─电抗器式的交流电源的总电流的增加必须通过增加负半波的时间才能实现。这将会造成铝合金交流ＴＩＧ焊和等离子弧焊在大电流焊接时钨极严重烧损，降低电弧和焊缝成型的稳定性。该结论不但对更好地理解可控制硅─电抗器式方波交流电源的工作原理有重要的参考价值，而且对于改造这种电源，使其能较好地用于铝合金穿孔型等离子弧焊有很大的指导意义。The reason that the reverse polarity time increased with the total current increase of SYNCROWAVE-300(s) power source in A.C. plasma arc welding of aluminium alloys was investigated in this paper.The result showed that the increase of the total current for this type of SCR-reactor welding power source with constant current output should be realized by increasing the reverse polarity output time of the power source,which will cause serious deterioration of tungsten in TIG or plasma arc welding of aluminium alloys with high welding current and make the arc and the weld formation unstable apparently.The conclusion of this phenomenon for SYNCROWAVE-300(s)welding power source not only posseses important referencial value for better understanding the power source,but also posseses more important guidce value for reforming this type of power source to be applied to keyhole plasma are welding of aluminium alloys.

关 键 词：铝合金 等离子弧焊 同步方波 交流电源 负半波 

分 类 号：TG456.2[金属学及工艺—焊接] TG457.14