一(yi)、半(ban)自動(dong)(dong)電動(dong)(dong)起子

在達(da)到設定扭力后不會(hui)自動剎車停止(zhi)的起子(zi)，稱(cheng)之為半自動電動起子(zi)。通常半自動設計(ji)為手(shou)按式。半自動有分AC高壓(ya)直(zhi)插式，與經過(guo)電源變(bian)壓(ya)為DC低壓(ya)式。

二、全自動電動起(qi)子

在達(da)到設(she)定扭力后能夠完全自(zi)動剎(cha)車(che)并停止運轉的電動起子(zi)稱為(wei)全自(zi)動電動起子(zi)。全自(zi)動電動起子(zi)又(you)分(fen)為(wei)AC高壓和(he)DC低壓兩(liang)(liang)個(ge)系(xi)列，根據(ju)操作啟動模式的不同(tong)又(you)分(fen)為(wei)手按(an)式和(he)下(xia)壓式兩(liang)(liang)種(zhong)。

高(gao)壓系列電(dian)(dian)(dian)動(dong)(dong)起子(zi)不需要(yao)單獨電(dian)(dian)(dian)源供(gong)應(ying)器轉換電(dian)(dian)(dian)壓，直接與市(shi)電(dian)(dian)(dian)連(lian)接，操(cao)作(zuo)快(kuai)捷占(zhan)用(yong)空間小(xiao)。低壓系列電(dian)(dian)(dian)動(dong)(dong)起子(zi)體積(ji)小(xiao)重(zhong)量輕，由(you)直流馬達驅動(dong)(dong)，壽命長安(an)全系數高(gao)。手(shou)按(an)(an)(an)式電(dian)(dian)(dian)動(dong)(dong)起子(zi)操(cao)作(zuo)啟(qi)(qi)(qi)動(dong)(dong)時只需用(yong)手(shou)指(zhi)按(an)(an)(an)住(zhu)啟(qi)(qi)(qi)動(dong)(dong)杠桿(gan)，或壓板按(an)(an)(an)鈕(niu)(niu)等。下壓式電(dian)(dian)(dian)動(dong)(dong)起子(zi)操(cao)作(zuo)啟(qi)(qi)(qi)動(dong)(dong)時無(wu)需用(yong)手(shou)指(zhi)按(an)(an)(an)住(zhu)啟(qi)(qi)(qi)動(dong)(dong)杠桿(gan)，或壓板按(an)(an)(an)鈕(niu)(niu)等，直接對(dui)準工件壓下就可啟(qi)(qi)(qi)動(dong)(dong)。