1常见问题
常用(yong)(yong)(yong)的(de)(de)(de)是(shi)各(ge)种弧(hu)焊(han)(han)(han)(han)(han)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)，也(ye)称电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)。它的(de)(de)(de)空载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)为(wei)60～100伏(fu)，工作电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)为(wei)25～45伏(fu)特(te)(te)，输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)为(wei)50～1000安。手工电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)弧(hu)焊(han)(han)(han)(han)(han)时，弧(hu)长常发生(sheng)变(bian)(bian)化，引起焊(han)(han)(han)(han)(han)接电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)变(bian)(bian)化。为(wei)使焊(han)(han)(han)(han)(han)接电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)稳定，所用(yong)(yong)(yong)弧(hu)焊(han)(han)(han)(han)(han)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)(de)外特(te)(te)性(xing)应是(shi)陡(dou)降的(de)(de)(de)，即随着输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)的(de)(de)(de)变(bian)(bian)化，输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)的(de)(de)(de)变(bian)(bian)化应很小。熔化极(ji)(ji)气体保护电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)弧(hu)焊(han)(han)(han)(han)(han)和(he)埋弧(hu)焊(han)(han)(han)(han)(han)可采用(yong)(yong)(yong)平特(te)(te)性(xing)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)，它的(de)(de)(de)输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)在电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)变(bian)(bian)化时变(bian)(bian)化很小。弧(hu)焊(han)(han)(han)(han)(han)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)一(yi)般有弧(hu)焊(han)(han)(han)(han)(han)变(bian)(bian)压(ya)(ya)器、直(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)弧(hu)焊(han)(han)(han)(han)(han)发电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)和(he)弧(hu)焊(han)(han)(han)(han)(han)整(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器。弧(hu)焊(han)(han)(han)(han)(han)变(bian)(bian)压(ya)(ya)器提供的(de)(de)(de)是(shi)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，应用(yong)(yong)(yong)较广(guang)。直(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)弧(hu)焊(han)(han)(han)(han)(han)发电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)机(ji)(ji)(ji)提供直(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，制(zhi)造较复杂，消耗材料较多(duo)且效率较低，有渐被弧(hu)焊(han)(han)(han)(han)(han)整(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器取代的(de)(de)(de)趋势。弧(hu)焊(han)(han)(han)(han)(han)整(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器是(shi)20世纪50年代发展起来的(de)(de)(de)直(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)弧(hu)焊(han)(han)(han)(han)(han)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)，采用(yong)(yong)(yong)硅二(er)极(ji)(ji)管或(huo)可控硅作整(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器。60年代出(chu)现的(de)(de)(de)用(yong)(yong)(yong)大功(gong)率晶(jing)体管组成的(de)(de)(de)晶(jing)体管式(shi)弧(hu)焊(han)(han)(han)(han)(han)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)，能(neng)获得较高的(de)(de)(de)控制(zhi)精度和(he)优(you)良的(de)(de)(de)性(xing)能(neng)，但成本较高。电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)的(de)(de)(de)焊(han)(han)(han)(han)(han)接能(neng)源(yuan)(yuan)(yuan)设备中较简单的(de)(de)(de)是(shi)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)变(bian)(bian)压(ya)(ya)器，空载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)范(fan)围为(wei)1～36伏(fu)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)从几千到几万(wan)安。配用(yong)(yong)(yong)这种焊(han)(han)(han)(han)(han)接能(neng)源(yuan)(yuan)(yuan)设备的(de)(de)(de)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)称为(wei)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)。其他还(hai)有低频(pin)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)、直(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)脉冲电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)、电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容储(chu)能(neng)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)和(he)次(ci)级整(zheng)(zheng)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)焊(han)(han)(han)(han)(han)机(ji)(ji)(ji)。
