一、半自動(dong)電動(dong)起子

在達到設(she)定扭力(li)后不會自動剎車停(ting)止的起子，稱之(zhi)為半自動電動起子。通常半自動設(she)計為手按式。半自動有分AC高壓直插式，與經(jing)過電源(yuan)變壓為DC低壓式。

二、全自動電動起子

在達到設定(ding)扭力后能夠完全(quan)(quan)(quan)自動(dong)剎車(che)并(bing)停止運(yun)轉的電動(dong)起子稱為全(quan)(quan)(quan)自動(dong)電動(dong)起子。全(quan)(quan)(quan)自動(dong)電動(dong)起子又分(fen)為AC高壓和(he)DC低壓兩(liang)個系列(lie)，根據操作啟動(dong)模式的不同又分(fen)為手按式和(he)下(xia)壓式兩(liang)種。

高壓系(xi)列(lie)電(dian)(dian)(dian)(dian)動(dong)(dong)起子(zi)不需(xu)(xu)要(yao)單(dan)獨電(dian)(dian)(dian)(dian)源供應(ying)器轉換電(dian)(dian)(dian)(dian)壓，直接與市(shi)電(dian)(dian)(dian)(dian)連接，操作快捷占用(yong)空間小。低壓系(xi)列(lie)電(dian)(dian)(dian)(dian)動(dong)(dong)起子(zi)體(ti)積小重量輕，由直流馬(ma)達驅動(dong)(dong)，壽(shou)命長安全(quan)系(xi)數高。手(shou)(shou)按式電(dian)(dian)(dian)(dian)動(dong)(dong)起子(zi)操作啟動(dong)(dong)時只需(xu)(xu)用(yong)手(shou)(shou)指(zhi)(zhi)按住(zhu)啟動(dong)(dong)杠(gang)桿，或(huo)壓板(ban)按鈕等。下(xia)壓式電(dian)(dian)(dian)(dian)動(dong)(dong)起子(zi)操作啟動(dong)(dong)時無需(xu)(xu)用(yong)手(shou)(shou)指(zhi)(zhi)按住(zhu)啟動(dong)(dong)杠(gang)桿，或(huo)壓板(ban)按鈕等，直接對準工件壓下(xia)就可啟動(dong)(dong)。