適用于(yu)斷(duan)續(xu)周(zhou)期性負(fu)荷，根據負(fu)荷的(de)(de)不同性質(zhi)電動(dong)機的(de)(de)工作(zuo)制分為S2、S3、S4、S5四(si)種類型，基準工作(zuo)制：單速(su)時為S3 40%，雙速(su)時、高速(su)為S3 25%；低速(su)為S3 15%。 主要用于(yu)各種型式的(de)(de)防爆(bao)(bao)起(qi)重機械(xie)的(de)(de)電力(li)驅動(dong)。適用于(yu)井下(xia)有(you)(you)甲烷或(huo)煤塵與空氣(qi)形成(cheng)的(de)(de) 爆(bao)(bao)炸(zha)性混合物的(de)(de)場所和工廠用傳爆(bao)(bao)能(neng)(neng)力(li)不高于(yu)ⅡB或(huo)ⅡC級(ji)，具有(you)(you)較大的(de)(de)過載能(neng)(neng)力(li)和較高的(de)(de)機械(xie)強(qiang)度，因此(ci)它特別適用于(yu)那些短時或(huo)斷(duan)續(xu)運轉、頻繁起(qi)動(dong)、制動(dong)的(de)(de)設備。

是(shi)感應電(dian)(dian)(dian)動機(ji)的(de)(de)一(yi)種，是(shi)靠(kao)同(tong)時接(jie)入380V三相(xiang)交(jiao)流電(dian)(dian)(dian)流（相(xiang)位差(cha)120度）供電(dian)(dian)(dian)的(de)(de)一(yi)類(lei)電(dian)(dian)(dian)動機(ji)，由(you)于的(de)(de)轉(zhuan)(zhuan)(zhuan)子(zi)與(yu)定(ding)子(zi)旋轉(zhuan)(zhuan)(zhuan)磁(ci)場(chang)(chang)(chang)以相(xiang)同(tong)的(de)(de)方向(xiang)、不同(tong)的(de)(de)轉(zhuan)(zhuan)(zhuan)速成旋轉(zhuan)(zhuan)(zhuan)，存(cun)在轉(zhuan)(zhuan)(zhuan)差(cha)率，所以叫三相(xiang)異步電(dian)(dian)(dian)動機(ji)。三相(xiang)異步電(dian)(dian)(dian)動機(ji)轉(zhuan)(zhuan)(zhuan)子(zi)的(de)(de)轉(zhuan)(zhuan)(zhuan)速低于旋轉(zhuan)(zhuan)(zhuan)磁(ci)場(chang)(chang)(chang)的(de)(de)轉(zhuan)(zhuan)(zhuan)速，轉(zhuan)(zhuan)(zhuan)子(zi)繞組因與(yu)磁(ci)場(chang)(chang)(chang)間(jian)存(cun)在著相(xiang)對運動而產(chan)生電(dian)(dian)(dian)動勢(shi)和電(dian)(dian)(dian)流，并(bing)與(yu)磁(ci)場(chang)(chang)(chang)相(xiang)互作用產(chan)生電(dian)(dian)(dian)磁(ci)轉(zhuan)(zhuan)(zhuan)矩，實現能量變換。

效率高隔爆型三相異步電動機轉子采用特殊工藝制造的鑄鋁結構，轉子導條、端環和風扇一次成型，提高了可靠性，增加了允許拖動負載的轉動慣量。并且輔以轉子平衡系統，使電動機運行平穩，振動和噪聲大大降低。沈陽隔爆型三相異步電動機采用滾(gun)動(dong)軸(zhou)承結(jie)(jie)構(gou)，均有不停機(ji)加油(you)和排油(you)裝置，軸(zhou)承結(jie)(jie)構(gou)的(de)良好設(she)計能(neng)防(fang)止灰塵(chen)，雨水侵入。出線(xian)(xian)盒(he)結(jie)(jie)構(gou)密封緊湊，防(fang)護(hu)等級高，有連接(jie)(jie)(jie)可靠的(de)接(jie)(jie)(jie)線(xian)(xian)端子(zi)，接(jie)(jie)(jie)線(xian)(xian)方(fang)式(shi)靈活，可多方(fang)位(wei)接(jie)(jie)(jie)線(xian)(xian)，出線(xian)(xian)盒(he)一般置于電動(dong)機(ji)右側。

具有良好(hao)的密封性，用(yong)于(yu)一般場所的電(dian)(dian)動(dong)(dong)(dong)機(ji)防(fang)護等級為IP44，用(yong)于(yu)冶(ye)金場所的電(dian)(dian)動(dong)(dong)(dong)機(ji)防(fang)護等級為IP54。YZR系列(lie)為繞(rao)線轉子三相(xiang)異步電(dian)(dian)動(dong)(dong)(dong)機(ji)，YZ系列(lie)為鼠籠轉子三相(xiang)異步電(dian)(dian)動(dong)(dong)(dong)機(ji)。的絕緣等級分為F級和(he)H級兩(liang)種。適(shi)用(yong)于(yu)驅動(dong)(dong)(dong)各種起重機(ji)械及冶(ye)輔(fu)助設(she)備，具有較(jiao)高(gao)的過載能(neng)力和(he)機(ji)械強度，特別適(shi)用(yong)于(yu)短時或(huo)斷續運轉，頻繁起動(dong)(dong)(dong)、制動(dong)(dong)(dong)及有顯著(zhu)振(zhen)動(dong)(dong)(dong)及有沖擊的設(she)備。

YCT系列電磁調(diao)速(su)電動(dong)(dong)機能在規定(ding)的(de)調(diao)速(su)范圍(wei)內均(jun)(jun)勻地、連續(xu)地無(wu)級調(diao)速(su)，并能輸出額定(ding)轉(zhuan)(zhuan)矩，在運行中當負載轉(zhuan)(zhuan)矩變(bian)動(dong)(dong)時可(ke)通過控(kong)(kong)制器(qi)的(de)速(su)度負反(fan)饋(kui)系統(tong)自動(dong)(dong)調(diao)節離合器(qi)的(de)勵磁電流，使輸出轉(zhuan)(zhuan)速(su)基(ji)本上保(bao)持不(bu)變(bian)。有全國統(tong)一的(de)技術條件(jian)，并且外形(xing)安裝尺寸、拖動(dong)(dong)電機及其它易損件(jian)全國各生產廠(chang)均(jun)(jun)為統(tong)一，可(ke)以互換。控(kong)(kong)制功率小，便于自控(kong)(kong)、群控(kong)(kong)、遙(yao)控(kong)(kong)；起(qi)動(dong)(dong)性能好，啟(qi)動(dong)(dong)轉(zhuan)(zhuan)矩大，起(qi)動(dong)(dong)平滑，使用維護方(fang)便等特點。