工頻(pin)交(jiao)流(liu)(liu)焊(han)機(ji)的(de)(de)調節周(zhou)期較長，對50Hz的(de)(de)電(dian)網，焊(han)接時(shi)間調節分辨率(lv)為20ms。逆(ni)(ni)變(bian)(bian)直(zhi)流(liu)(liu)點焊(han)機(ji)時(shi)間調節分辨率(lv)可達0.25ms(4kHz逆(ni)(ni)變(bian)(bian)頻(pin)率(lv))，控(kong)制(zhi)精度(du)高。逆(ni)(ni)變(bian)(bian)焊(han)機(ji)的(de)(de)反饋控(kong)制(zhi)的(de)(de)響(xiang)(xiang)應速度(du)明顯加快(kuai)，輸(shu)(shu)出穩(wen)定性(xing)好。工頻(pin)交(jiao)流(liu)(liu)焊(han)機(ji)由(you)于電(dian)流(liu)(liu)過(guo)零的(de)(de)影響(xiang)(xiang)，熱(re)效率(lv)低，用(yong)(yong)晶閘管調節電(dian)流(liu)(liu)，當電(dian)流(liu)(liu)百(bai)分比偏小時(shi)，過(guo)零時(shi)間長，影響(xiang)(xiang)更大；逆(ni)(ni)變(bian)(bian)直(zhi)流(liu)(liu)點焊(han)機(ji)輸(shu)(shu)出電(dian)流(liu)(liu)為脈動直(zhi)流(liu)(liu)，在回路電(dian)感的(de)(de)作用(yong)(yong)下為連續(xu)直(zhi)流(liu)(liu)輸(shu)(shu)出，熱(re)效率(lv)高，焊(han)接熱(re)輸(shu)(shu)入穩(wen)定。

    交流(liu)焊(han)機(ji)與(yu)電(dian)(dian)(dian)(dian)容貯能(neng)(neng)(neng)點焊(han)機(ji)比(bi)從焊(han)接質量(liang)上(shang)來(lai)說：電(dian)(dian)(dian)(dian)容貯能(neng)(neng)(neng)焊(han)機(ji)將(jiang)電(dian)(dian)(dian)(dian)容中(zhong)儲存的能(neng)(neng)(neng)量(liang)一次性釋放給焊(han)接回路，輸(shu)出能(neng)(neng)(neng)量(liang)調節(jie)靠控制電(dian)(dian)(dian)(dian)容的充電(dian)(dian)(dian)(dian)能(neng)(neng)(neng)量(liang)完(wan)成，通(tong)常有調節(jie)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓(ya)和(he)電(dian)(dian)(dian)(dian)容容量(liang)兩種方法，輸(shu)出電(dian)(dian)(dian)(dian)流(liu)為脈沖(chong)電(dian)(dian)(dian)(dian)流(liu)，時間(jian)不能(neng)(neng)(neng)通(tong)過(guo)電(dian)(dian)(dian)(dian)子控制來(lai)調節(jie)。逆(ni)(ni)變直(zhi)(zhi)流(liu)焊(han)機(ji)為較(jiao)平穩的直(zhi)(zhi)流(liu)，電(dian)(dian)(dian)(dian)流(liu)通(tong)過(guo)逆(ni)(ni)變脈寬調節(jie)，時間(jian)通(tong)過(guo)逆(ni)(ni)變周期(qi)數調節(jie)，焊(han)接能(neng)(neng)(neng)量(liang)可由(you)電(dian)(dian)(dian)(dian)流(liu)和(he)時間(jian)精確控制。

    從焊(han)接(jie)速度(du)上來說：電(dian)容(rong)貯能焊(han)機需要合理的電(dian)容(rong)充電(dian)過(guo)程(否(fou)則電(dian)容(rong)易(yi)損壞(huai))，降(jiang)低了生(sheng)產速度(du)。逆變電(dian)阻點(dian)焊(han)機沒有這一(yi)過(guo)程，焊(han)接(jie)速度(du)高。

    從節能效果上來說：電容貯能焊機(ji)的變(bian)(bian)壓(ya)器實際工作(zuo)在更低的頻(pin)率，為(wei)防止飽和(he)，變(bian)(bian)壓(ya)器鐵心(xin)更大，損(sun)耗(hao)加大；電容充電回(hui)路也增加損(sun)耗(hao)。逆(ni)變(bian)(bian)焊機(ji)變(bian)(bian)壓(ya)器工作(zuo)在較高的頻(pin)率(1-4kHz)，損(sun)耗(hao)很小(xiao)，直流輸出改善功(gong)率因素，節能效果明顯。

    從(cong)設備(bei)體(ti)積與(yu)重(zhong)量：電(dian)容(rong)(rong)貯能焊機的(de)(de)變壓器鐵(tie)心大，儲(chu)能電(dian)容(rong)(rong)也占據相(xiang)當的(de)(de)空間，設備(bei)笨重(zhong)。逆變直流電(dian)阻點焊機變壓器小、沒(mei)有龐大的(de)(de)電(dian)容(rong)(rong)器組，設備(bei)較輕(qing)巧。