工(gong)頻(pin)交(jiao)流(liu)(liu)(liu)(liu)焊(han)(han)機(ji)的調(diao)(diao)(diao)節(jie)周(zhou)期較長，對(dui)50Hz的電(dian)網，焊(han)(han)接時(shi)(shi)(shi)間調(diao)(diao)(diao)節(jie)分(fen)(fen)辨率(lv)(lv)為(wei)20ms。逆(ni)(ni)變直(zhi)流(liu)(liu)(liu)(liu)點焊(han)(han)機(ji)時(shi)(shi)(shi)間調(diao)(diao)(diao)節(jie)分(fen)(fen)辨率(lv)(lv)可達0.25ms(4kHz逆(ni)(ni)變頻(pin)率(lv)(lv))，控(kong)制精度(du)高(gao)。逆(ni)(ni)變焊(han)(han)機(ji)的反饋(kui)控(kong)制的響應速度(du)明(ming)顯(xian)加(jia)快(kuai)，輸(shu)出穩定性(xing)好(hao)。工(gong)頻(pin)交(jiao)流(liu)(liu)(liu)(liu)焊(han)(han)機(ji)由于電(dian)流(liu)(liu)(liu)(liu)過零的影響，熱(re)效(xiao)率(lv)(lv)低，用(yong)晶閘(zha)管調(diao)(diao)(diao)節(jie)電(dian)流(liu)(liu)(liu)(liu)，當電(dian)流(liu)(liu)(liu)(liu)百(bai)分(fen)(fen)比(bi)偏小(xiao)時(shi)(shi)(shi)，過零時(shi)(shi)(shi)間長，影響更大；逆(ni)(ni)變直(zhi)流(liu)(liu)(liu)(liu)點焊(han)(han)機(ji)輸(shu)出電(dian)流(liu)(liu)(liu)(liu)為(wei)脈動(dong)直(zhi)流(liu)(liu)(liu)(liu)，在回路(lu)電(dian)感的作用(yong)下為(wei)連續(xu)直(zhi)流(liu)(liu)(liu)(liu)輸(shu)出，熱(re)效(xiao)率(lv)(lv)高(gao)，焊(han)(han)接熱(re)輸(shu)入穩定。

    交流(liu)焊(han)機(ji)與電(dian)(dian)容(rong)貯能(neng)(neng)點焊(han)機(ji)比從焊(han)接(jie)質量上(shang)來(lai)說(shuo)：電(dian)(dian)容(rong)貯能(neng)(neng)焊(han)機(ji)將電(dian)(dian)容(rong)中儲(chu)存的能(neng)(neng)量一(yi)次性(xing)釋放(fang)給焊(han)接(jie)回(hui)路，輸出能(neng)(neng)量調(diao)節靠控制(zhi)電(dian)(dian)容(rong)的充電(dian)(dian)能(neng)(neng)量完成，通常(chang)有調(diao)節充電(dian)(dian)電(dian)(dian)壓和(he)電(dian)(dian)容(rong)容(rong)量兩種方法，輸出電(dian)(dian)流(liu)為脈沖(chong)電(dian)(dian)流(liu)，時(shi)間(jian)不能(neng)(neng)通過電(dian)(dian)子(zi)控制(zhi)來(lai)調(diao)節。逆變(bian)直(zhi)流(liu)焊(han)機(ji)為較平穩的直(zhi)流(liu)，電(dian)(dian)流(liu)通過逆變(bian)脈寬調(diao)節，時(shi)間(jian)通過逆變(bian)周期數調(diao)節，焊(han)接(jie)能(neng)(neng)量可由電(dian)(dian)流(liu)和(he)時(shi)間(jian)精確控制(zhi)。

    從焊接速度上來說(shuo)：電(dian)(dian)容(rong)(rong)貯能焊機需要合理的(de)電(dian)(dian)容(rong)(rong)充電(dian)(dian)過程(cheng)(否則(ze)電(dian)(dian)容(rong)(rong)易(yi)損(sun)壞(huai))，降低了生產速度。逆變電(dian)(dian)阻點焊機沒(mei)有(you)這一過程(cheng)，焊接速度高。

    從(cong)節能(neng)效果上來說：電(dian)容貯能(neng)焊(han)機的(de)變壓(ya)(ya)器(qi)(qi)實際工作(zuo)在更低的(de)頻率，為(wei)防止飽和，變壓(ya)(ya)器(qi)(qi)鐵心更大(da)，損耗(hao)加大(da)；電(dian)容充電(dian)回(hui)路也增加損耗(hao)。逆變焊(han)機變壓(ya)(ya)器(qi)(qi)工作(zuo)在較高的(de)頻率(1-4kHz)，損耗(hao)很小，直(zhi)流輸出改善功率因素，節能(neng)效果明(ming)顯。

    從設(she)備體積與(yu)重(zhong)量：電(dian)(dian)容貯能焊機(ji)(ji)的(de)(de)變(bian)壓器(qi)鐵心大，儲能電(dian)(dian)容也占據(ju)相(xiang)當的(de)(de)空間，設(she)備笨重(zhong)。逆變(bian)直流電(dian)(dian)阻點焊機(ji)(ji)變(bian)壓器(qi)小、沒有龐大的(de)(de)電(dian)(dian)容器(qi)組，設(she)備較輕(qing)巧。