臥式防爆起重電機

選(xuan)型：

1、為電(dian)(dian)(dian)機(ji)供給電(dian)(dian)(dian)源的類型(xing)，如(ru)單相(xiang)(xiang)、三(san)(san)相(xiang)(xiang)、直(zhi)流電(dian)(dian)(dian)等。三(san)(san)相(xiang)(xiang)異步電(dian)(dian)(dian)機(ji)當電(dian)(dian)(dian)動(dong)機(ji)的三(san)(san)相(xiang)(xiang)定(ding)子(zi)繞(rao)組（各相(xiang)(xiang)差120度電(dian)(dian)(dian)角(jiao)度），通入三(san)(san)相(xiang)(xiang)對稱交流電(dian)(dian)(dian)后(hou)，將產(chan)生(sheng)一個旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場，該旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場切(qie)割轉(zhuan)(zhuan)(zhuan)子(zi)繞(rao)組，從而(er)在轉(zhuan)(zhuan)(zhuan)子(zi)繞(rao)組中產(chan)生(sheng)感(gan)應電(dian)(dian)(dian)流（轉(zhuan)(zhuan)(zhuan)子(zi)繞(rao)組是閉合通路），載流的轉(zhuan)(zhuan)(zhuan)子(zi)導體(ti)在定(ding)子(zi)旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場作(zuo)用下將產(chan)生(sheng)電(dian)(dian)(dian)磁(ci)(ci)力(li)，從而(er)在電(dian)(dian)(dian)機(ji)轉(zhuan)(zhuan)(zhuan)軸上形成(cheng)電(dian)(dian)(dian)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)矩，驅動(dong)電(dian)(dian)(dian)動(dong)機(ji)旋轉(zhuan)(zhuan)(zhuan)，并且(qie)電(dian)(dian)(dian)機(ji)旋轉(zhuan)(zhuan)(zhuan)方向與旋轉(zhuan)(zhuan)(zhuan)磁(ci)(ci)場方向相(xiang)(xiang)同。

2、電機(ji)的運作(zuo)環境，電機(ji)運作(zuo)場合能否有特(te)別性，如(ru)濕潤、低(di)溫、化(hua)學腐化(hua)、粉塵等等。

3、電機的(de)運作(zuo)方法(fa)，是持續(xu)運作(zuo)照樣短時運作(zuo)或是別的(de)運作(zuo)方法(fa)。

4、電機的裝配(pei)(pei)方(fang)法，如(ru)立式裝配(pei)(pei)、臥(wo)式裝配(pei)(pei)等等。

5、電機的功率(lv)及轉(zhuan)速等(deng)，功率(lv)及轉(zhuan)速應滿(man)意負載的請(qing)求。

6、別的困素，如能否(fou)必要變(bian)速(su)、有沒有特別節(jie)制請(qing)求(qiu)、負載的類(lei)型等

臥式防爆起重電機

與單相(xiang)異(yi)步電(dian)(dian)(dian)動機(ji)相(xiang)比，三(san)(san)相(xiang)異(yi)步電(dian)(dian)(dian)機(ji)運行(xing)性能好，并可(ke)節省(sheng)材料。三(san)(san)相(xiang)異(yi)步電(dian)(dian)(dian)機(ji)歸屬(shu)于(yu)感應電(dian)(dian)(dian)動機(ji)，是靠同時接入一定(ding)額定(ding)電(dian)(dian)(dian)壓、相(xiang)位互差120度的(de)三(san)(san)相(xiang)交流電(dian)(dian)(dian)流電(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)的(de)電(dian)(dian)(dian)動機(ji)。由于(yu)三(san)(san)相(xiang)異(yi)步電(dian)(dian)(dian)機(ji)的(de)轉(zhuan)子與定(ding)子旋(xuan)轉(zhuan)磁場以(yi)(yi)相(xiang)同方向、不同轉(zhuan)速旋(xuan)轉(zhuan)，存(cun)在轉(zhuan)速差，所(suo)以(yi)(yi)叫(jiao)三(san)(san)相(xiang)異(yi)步電(dian)(dian)(dian)機(ji)。

三相(xiang)異步(bu)電機轉(zhuan)(zhuan)(zhuan)子(zi)的轉(zhuan)(zhuan)(zhuan)速(su)總(zong)是低(di)于旋(xuan)轉(zhuan)(zhuan)(zhuan)磁場(chang)轉(zhuan)(zhuan)(zhuan)速(su)，轉(zhuan)(zhuan)(zhuan)子(zi)繞組因與磁場(chang)間存在著相(xiang)對運動而產(chan)生電動勢和(he)電流(liu)，并與磁場(chang)相(xiang)互作用產(chan)生電磁轉(zhuan)(zhuan)(zhuan)矩，實現電能向機械能的轉(zhuan)(zhuan)(zhuan)換。

按轉子(zi)(zi)(zi)結(jie)構的(de)不同(tong)，三相異步電(dian)機(ji)(ji)可(ke)分為籠式(shi)和(he)(he)繞(rao)線式(shi)兩種(zhong)。籠式(shi)轉子(zi)(zi)(zi)的(de)異步電(dian)動(dong)機(ji)(ji)結(jie)構簡單、運行可(ke)靠、重量輕、價格(ge)便宜，得到(dao)了廣泛的(de)應用，其主要缺點(dian)是(shi)調(diao)速(su)困(kun)難。繞(rao)線式(shi)三相異步電(dian)機(ji)(ji)的(de)轉子(zi)(zi)(zi)和(he)(he)定子(zi)(zi)(zi)一樣(yang)也設置了三相繞(rao)組并通過滑(hua)環、電(dian)刷(shua)與外部變(bian)阻器連接。調(diao)節變(bian)阻器電(dian)阻可(ke)以改(gai)變(bian)大轉矩相對應的(de)轉速(su)，改(gai)善電(dian)動(dong)機(ji)(ji)的(de)起動(dong)性能(neng)和(he)(he)調(diao)節電(dian)動(dong)機(ji)(ji)的(de)轉速(su)。