三相(xiang)異(yi)步(bu)電(dian)(dian)動機(ji)(ji)(ji)選(xuan)型要(yao)(yao)點(dian)有哪(na)些呢？額定(ding)(ding)轉(zhuan)(zhuan)速(su)(su)：根(gen)據負(fu)載(zai)對轉(zhuan)(zhuan)速(su)(su)的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)(qiu)，選(xuan)擇(ze)合適(shi)的(de)(de)(de)(de)(de)額定(ding)(ding)轉(zhuan)(zhuan)速(su)(su)。如(ru)果負(fu)載(zai)對轉(zhuan)(zhuan)速(su)(su)要(yao)(yao)求(qiu)(qiu)不高，可以(yi)(yi)選(xuan)擇(ze)低轉(zhuan)(zhuan)速(su)(su)電(dian)(dian)機(ji)(ji)(ji)，節能效果更好。額定(ding)(ding)電(dian)(dian)壓：選(xuan)擇(ze)與供電(dian)(dian)電(dian)(dian)網相(xiang)匹配的(de)(de)(de)(de)(de)額定(ding)(ding)電(dian)(dian)壓的(de)(de)(de)(de)(de)電(dian)(dian)機(ji)(ji)(ji)，以(yi)(yi)保證(zheng)電(dian)(dian)機(ji)(ji)(ji)正常運行(xing)(xing)。極(ji)數：電(dian)(dian)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)極(ji)數決定(ding)(ding)了電(dian)(dian)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)轉(zhuan)(zhuan)速(su)(su)，根(gen)據負(fu)載(zai)的(de)(de)(de)(de)(de)轉(zhuan)(zhuan)速(su)(su)要(yao)(yao)求(qiu)(qiu)選(xuan)擇(ze)合適(shi)的(de)(de)(de)(de)(de)極(ji)數。轉(zhuan)(zhuan)矩(ju)(ju)：根(gen)據負(fu)載(zai)的(de)(de)(de)(de)(de)轉(zhuan)(zhuan)矩(ju)(ju)要(yao)(yao)求(qiu)(qiu)選(xuan)擇(ze)合適(shi)的(de)(de)(de)(de)(de)電(dian)(dian)機(ji)(ji)(ji)，電(dian)(dian)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)額定(ding)(ding)轉(zhuan)(zhuan)矩(ju)(ju)應(ying)略大于(yu)負(fu)載(zai)轉(zhuan)(zhuan)矩(ju)(ju)，以(yi)(yi)保證(zheng)電(dian)(dian)機(ji)(ji)(ji)正常運行(xing)(xing)。環境(jing)溫(wen)度：考慮電(dian)(dian)機(ji)(ji)(ji)工作的(de)(de)(de)(de)(de)環境(jing)溫(wen)度和(he)(he)濕度，選(xuan)擇(ze)合適(shi)的(de)(de)(de)(de)(de)電(dian)(dian)機(ji)(ji)(ji)防護(hu)(hu)等(deng)級(ji)和(he)(he)絕緣等(deng)級(ji)。三相(xiang)異(yi)步(bu)電(dian)(dian)動機(ji)(ji)(ji)的(de)(de)(de)(de)(de)絕緣等(deng)級(ji)和(he)(he)保護(hu)(hu)等(deng)級(ji)需要(yao)(yao)根(gen)據實(shi)際使用(yong)環境(jing)和(he)(he)要(yao)(yao)求(qiu)(qiu)進行(xing)(xing)選(xuan)擇(ze)。常用(yong)的(de)(de)(de)(de)(de)三相(xiang)異(yi)步(bu)電(dian)(dian)動機(ji)(ji)(ji)銷(xiao)售

三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)優點有哪些呢？電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)的(de)遠(yuan)距離(li)輸送簡(jian)便經(jing)濟，分(fen)配(pei)簡(jian)單(dan)，檢側方便，價格(ge)低廉。三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)拖(tuo)動(dong)(dong)(dong)比其(qi)他形式的(de)拖(tuo)動(dong)(dong)(dong)效(xiao)率高，運(yun)行(xing)效(xiao)率較(jiao)高。與拖(tuo)動(dong)(dong)(dong)機(ji)械的(de)連接簡(jian)便。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)結(jie)構簡(jian)單(dan)，制(zhi)造(zao)容(rong)易(yi)，運(yun)行(xing)可靠，堅固耐用，且維護比較(jiao)方便。三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)的(de)型式與種類很(hen)多，具有各種各樣的(de)特性(xing)，可適應不(bu)同生產機(ji)械的(de)需要，且三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)拖(tuo)動(dong)(dong)(dong)的(de)起動(dong)(dong)(dong)、制(zhi)動(dong)(dong)(dong)、反向與調(diao)速等(deng)控(kong)制(zhi)簡(jian)便迅速，調(diao)速性(xing)能(neng)良好。可實現遠(yuan)距離(li)控(kong)制(zhi)與自(zi)動(dong)(dong)(dong)調(diao)節(jie)，并進(jin)而實現生產過程的(de)自(zi)動(dong)(dong)(dong)化(hua)。常用的(de)三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)銷(xiao)售三(san)(san)相異(yi)步(bu)(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣性(xing)能(neng)包括電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流、功率因數、效(xiao)率等(deng)指(zhi)標。

該(gai)方(fang)法(fa)適(shi)合于(yu)(yu)風(feng)機(ji)(ji)(ji)(ji)(ji)、水泵及軋鋼機(ji)(ji)(ji)(ji)(ji)、礦(kuang)井提升機(ji)(ji)(ji)(ji)(ji)、擠壓(ya)機(ji)(ji)(ji)(ji)(ji)上使用。繞線式(shi)異(yi)步(bu)電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)轉(zhuan)(zhuan)(zhuan)(zhuan)子串入(ru)附加電(dian)(dian)阻(zu)，使電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)差(cha)率加大(da)，電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)在(zai)較(jiao)低(di)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)下(xia)運(yun)行。串入(ru)的(de)電(dian)(dian)阻(zu)越(yue)大(da)，電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)越(yue)低(di)。此方(fang)法(fa)設(she)備簡單(dan)，控制方(fang)便，但轉(zhuan)(zhuan)(zhuan)(zhuan)差(cha)功率以發熱(re)的(de)形式(shi)消耗在(zai)電(dian)(dian)阻(zu)上。屬有級調速(su)(su)，機(ji)(ji)(ji)(ji)(ji)械特性(xing)較(jiao)軟。當改變(bian)電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)的(de)定子電(dian)(dian)壓(ya)時，可以得(de)到一組不(bu)同(tong)的(de)機(ji)(ji)(ji)(ji)(ji)械特性(xing)曲線，從而獲得(de)不(bu)同(tong)轉(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)。由于(yu)(yu)電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)矩與(yu)電(dian)(dian)壓(ya)平方(fang)成正比，因此較(jiao)大(da)轉(zhuan)(zhuan)(zhuan)(zhuan)矩下(xia)降很多，其(qi)調速(su)(su)范圍較(jiao)小(xiao)，使一般籠型電(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)(ji)難以應用。

三相(xiang)異(yi)步電(dian)動(dong)(dong)機常見問題維修方法：繞(rao)組(zu)(zu)接地(di)的(de)(de)修理，打開極相(xiang)組(zu)(zu)之間的(de)(de)連線(xian)(xian)，確定接地(di)的(de)(de)極相(xiang)組(zu)(zu)，用兆歐表查找(zhao)出(chu)接地(di)線(xian)(xian)圈(quan)。接地(di)點在(zai)(zai)槽口(kou)的(de)(de)修理：將繞(rao)組(zu)(zu)通(tong)電(dian)加熱(re)，絕緣軟(ruan)化(hua)后(hou)抽(chou)出(chu)槽楔，用劃(hua)線(xian)(xian)板劃(hua)開接地(di)處(chu)絕緣，插入大小、厚度適當的(de)(de)同一(yi)等級的(de)(de)絕緣材料，后(hou)涂(tu)漆(qi)烘干，封槽。接地(di)點在(zai)(zai)槽內的(de)(de)修理：雙層繞(rao)組(zu)(zu)在(zai)(zai)槽內的(de)(de)將線(xian)(xian)圈(quan)加熱(re)，待絕緣軟(ruan)化(hua)后(hou)抬(tai)出(chu)上層線(xian)(xian)圈(quan)，更換部(bu)分(fen)槽內絕緣。下層線(xian)(xian)圈(quan)槽內接地(di)的(de)(de)一(yi)般要將舊繞(rao)組(zu)(zu)拆除(chu)全(quan)部(bu)重嵌。繞(rao)組(zu)(zu)短(duan)路的(de)(de)修理，繞(rao)組(zu)(zu)發(fa)生短(duan)路后(hou)在(zai)(zai)故障處(chu)產生高熱(re)使絕緣焦(jiao)(jiao)脆，可(ke)在(zai)(zai)繞(rao)組(zu)(zu)外在(zai)(zai)面(mian)細(xi)心觀察，有(you)沒有(you)燒焦(jiao)(jiao)的(de)(de)地(di)方和嗅到氣味。三相(xiang)異(yi)步電(dian)動(dong)(dong)機拖動(dong)(dong)的(de)(de)起動(dong)(dong)、制動(dong)(dong)、反向與調(diao)速等控(kong)制簡便迅速，調(diao)速性能良好。

三(san)(san)相(xiang)異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)故障檢(jian)查方法(fa)(fa)：試(shi)燈法(fa)(fa)。方法(fa)(fa)同前，等不(bu)亮的(de)(de)一(yi)(yi)(yi)相(xiang)為斷路(lu)。兆歐表法(fa)(fa)。阻值(zhi)趨向無(wu)窮大（即不(bu)為零(ling)值(zhi)）的(de)(de)一(yi)(yi)(yi)相(xiang)為斷路(lu)點(dian)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表法(fa)(fa)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)在運(yun)行(xing)時(shi)(shi)，用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)表測三(san)(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，若三(san)(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)不(bu)平(ping)衡、又(you)無(wu)短路(lu)現象，則電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)較小(xiao)(xiao)的(de)(de)一(yi)(yi)(yi)相(xiang)繞(rao)組有部分短斷路(lu)故障。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)橋法(fa)(fa)。當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)某一(yi)(yi)(yi)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻比其(qi)他兩相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻大時(shi)(shi),說明(ming)該相(xiang)繞(rao)組有部分斷路(lu)故障；電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)平(ping)衡法(fa)(fa)。對于“Y”型接(jie)法(fa)(fa)的(de)(de)，可將三(san)(san)相(xiang)繞(rao)組并(bing)聯后，通入(ru)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，如果三(san)(san)相(xiang)繞(rao)組中的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)相(xiang)差(cha)大于10%時(shi)(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)小(xiao)(xiao)的(de)(de)一(yi)(yi)(yi)端為斷路(lu)；對于“△”型接(jie)法(fa)(fa)的(de)(de)，先將定子繞(rao)組的(de)(de)一(yi)(yi)(yi)個(ge)接(jie)點(dian)拆開，再逐相(xiang)通入(ru)低壓大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，其(qi)中電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)小(xiao)(xiao)的(de)(de)一(yi)(yi)(yi)相(xiang)為斷路(lu)。三(san)(san)相(xiang)異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)轉子和定子之間的(de)(de)噪音和振(zhen)動(dong)需要控制在適當(dang)范圍內，以(yi)避免影響工(gong)作環境和健康。哈爾濱三(san)(san)相(xiang)異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)什么(me)牌子好

三相異(yi)步電(dian)動機(ji)(ji)的(de)電(dian)機(ji)(ji)轉子和定子之間的(de)空氣(qi)隙需要控制在適當范圍內，以(yi)保證電(dian)機(ji)(ji)性(xing)能和壽命。常用的(de)三相異(yi)步電(dian)動機(ji)(ji)銷售

液力(li)耦(ou)合器是一(yi)種液力(li)傳動(dong)裝置，一(yi)般由(you)泵(beng)輪(lun)(lun)(lun)和渦輪(lun)(lun)(lun)組成，它們(men)統稱(cheng)工作(zuo)輪(lun)(lun)(lun)，放在(zai)(zai)密(mi)封殼體(ti)中。殼中充入一(yi)定量的(de)(de)(de)(de)工作(zuo)液體(ti)，當泵(beng)輪(lun)(lun)(lun)在(zai)(zai)原動(dong)機(ji)(ji)(ji)帶動(dong)下旋(xuan)轉(zhuan)時(shi)，處于其中的(de)(de)(de)(de)液體(ti)受葉(xie)(xie)片推動(dong)而旋(xuan)轉(zhuan)，在(zai)(zai)離心力(li)作(zuo)用下沿著(zhu)泵(beng)輪(lun)(lun)(lun)外環進(jin)入渦輪(lun)(lun)(lun)時(shi)，就在(zai)(zai)同一(yi)轉(zhuan)向上給(gei)渦輪(lun)(lun)(lun)葉(xie)(xie)片以推力(li)，使其帶動(dong)生產機(ji)(ji)(ji)械運轉(zhuan)。液力(li)耦(ou)合器的(de)(de)(de)(de)動(dong)力(li)轉(zhuan)輸能(neng)力(li)與殼內相對充液量的(de)(de)(de)(de)大(da)小(xiao)是一(yi)致的(de)(de)(de)(de)。在(zai)(zai)工作(zuo)過程(cheng)中，改變充液率就可以改變耦(ou)合器的(de)(de)(de)(de)渦輪(lun)(lun)(lun)轉(zhuan)速(su)，作(zuo)到無級調速(su)，其特點為：1、功率適應范圍大(da)，可滿足從幾(ji)十千瓦至數千千瓦不(bu)同功率的(de)(de)(de)(de)需要；2、結構簡單(dan)，工作(zuo)可靠(kao)，使用及維修(xiu)方便(bian)，且造價低；3、尺寸小(xiao)，能(neng)容(rong)大(da)；4、控制調節方便(bian)，容(rong)易(yi)實(shi)現自動(dong)控制。該方法適用于風(feng)機(ji)(ji)(ji)、水泵(beng)的(de)(de)(de)(de)調速(su)。常(chang)用的(de)(de)(de)(de)三相異步電動(dong)機(ji)(ji)(ji)銷售

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