怎么將三相電機改為單相運行，一定要更換電機嗎？今天江蘇空壓機小編就為大家介紹幾種簡便易行的方法，可以不改動電機內部繞組而將三相電機改為單相運行。

一、加電(dian)解(jie)電(dian)容(rong)法

倘若調速電機的輸出(chu)精度功(gong)效為標稱(cheng)功(gong)效的55%～90%。C1為作業電解電阻(zu)器，C2為打火(huo)電解電阻(zu)器，都需選(xuan)擇電力(li)網電解電阻(zu)器器，其耐壓試驗值可以不如果低于450V。C1、C2的存(cun)儲量可按下(xia)面公式式估價(jia)：

C1=1950I/U×cosθ

C2=(1～4)C1

式中(zhong)C的組織為(uF)、I為高(gao)壓無(wu)刷(shua)電(dian)機固(gu)定(ding)(ding)瞬時電(dian)流(liu)(A)、U為高(gao)壓無(wu)刷(shua)電(dian)機固(gu)定(ding)(ding)電(dian)壓電(dian)流(liu)(V)、cosθ為工作功(gong)率質數(shu)，尋常取0.5～0.7。

 尤為(wei)(wei)地(di)，這對于耗油率為(wei)(wei)1KW下類(lei)的(de)(de)三(san)相電(dian)異步電(dian)動(dong)式四(si)輪(lun)機(ji)，不錯(cuo)沒(mei)用C2，但(dan)C1均值要(yao)適當的(de)(de)提高。可(ke)按C1=13I約(yue)算選定，式中(zhong)C1的(de)(de)基層單(dan)位為(wei)(wei)(uF)，I為(wei)(wei)原(yuan)電(dian)動(dong)式四(si)輪(lun)機(ji)的(de)(de)額定功率直流電(dian)壓(A)。電(dian)感的(de)(de)出(chu)水量(liang)應(ying)當選適合(he)，一旦違反電(dian)動(dong)式四(si)輪(lun)機(ji)不可(ke)以(yi)正常人程(cheng)序運(yun)行和溫(wen)度上升過(guo)高。

相(xiang)對只能(neng)(neng)有(you)好幾百瓦(wa)的(de)小(xiao)輸(shu)出相(xiang)電(dian)(dian)(dian)壓異步電(dian)(dian)(dian)動機，電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容數量(liang)(liang)可按C=0.06P(Y接時(shi))和C=0.1P(△接時(shi))選擇，式中C的(de)企業為(wei)(uF)，P為(wei)三相(xiang)電(dian)(dian)(dian)機輸(shu)出(W)。C1、C2數量(liang)(liang)能(neng)(neng)同樣，如轉速太快，能(neng)(neng)提升(sheng)(sheng)加熱器端差(cha)量(liang)(liang)或(huo)變大電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容數量(liang)(liang)，如轉速很(hen)慢(man)，可變大加熱器端差(cha)量(liang)(liang)或(huo)提升(sheng)(sheng)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)容數量(liang)(liang)。

二、改(gai)進建議的加濾波電容法

方便增長直流(liu)電思想的(de)輸出精度工作功(gong)率(lv)，C1的(de)排序同“措(cuo)施(shi)一”中的(de)C1，C2、C3、R輕按式排序：

C2=(2～4)C1

C3=2C1

R=0.25U/I

三、配電盤阻法

電容(rong)R的配搭要合理(li)。R值自選為兩相(xiang)電機(ji)定子的電容(rong)值的5～10倍。

四、電解電容、電感移(yi)相(xiang)法

用(yong)(yong)到二只電(dian)(dian)(dian)感(gan)(應主意電(dian)(dian)(dian)感(gan)L的載流學習(xi)能(neng)力)和兩支電(dian)(dian)(dian)阻(zu)（電(dian)(dian)(dian)阻(zu)器(qi)(qi)）從220V電(dian)(dian)(dian)源開關確認(ren)380V相對(dui)(dui)性輸出功率，啟動圖的方式(shi)形(xing)式(shi)插頭接線處，在這種方式(shi)形(xing)式(shi)自我調(diao)節性很強，但(dan)要配值鐵芯(xin)電(dian)(dian)(dian)感(gan)，也能(neng)否用(yong)(yong)220V自耦調(diao)壓器(qi)(qi)來帶換。我們對(dui)(dui)越大的直(zhi)流電(dian)(dian)(dian)思想(xiang)宜(yi)用(yong)(yong)到此(ci)法。諸如(ru)，當調(diao)速電(dian)(dian)(dian)機為(wei)2.2KW用(yong)(yong)到“△接”時，電(dian)(dian)(dian)阻(zu)（電(dian)(dian)(dian)阻(zu)器(qi)(qi)）C選254uF，電(dian)(dian)(dian)感(gan)L難(nan)以確定78mH。電(dian)(dian)(dian)阻(zu)（電(dian)(dian)(dian)阻(zu)器(qi)(qi)）C，電(dian)(dian)(dian)感(gan)L可啟動式(shi)難(nan)以確定：

C=(Ssin(60+φ)×10^6)/(1.5WU^2)

L=(1.5U^2)/(WSsin(60-φ))

式中C的操作濾波電(dian)容體(ti)積為(uF);L：電(dian)感量(H);S：電(dian)動機(ji)(ji)(ji)電(dian)機(ji)(ji)(ji)額(e)定(ding)耗油(you)(you)率(lv)電(dian)機(ji)(ji)(ji)耗油(you)(you)率(lv)電(dian)機(ji)(ji)(ji)耗油(you)(you)率(lv)(VA);φ：電(dian)動機(ji)(ji)(ji)電(dian)機(ji)(ji)(ji)額(e)定(ding)耗油(you)(you)率(lv)電(dian)機(ji)(ji)(ji)耗油(you)(you)率(lv)阻抗(kang)時的電(dian)機(ji)(ji)(ji)耗油(you)(you)率(lv)質因數角(度);W：角幀率(lv)(W=2πF=314)

五(wu)、加(jia)按鈕開關法(fa)

裝重新啟動控制(zhi)開(kai)關K，便能否接入網三相變頻(pin)器運營。

六、電子設(she)備(bei)有效控制法

來說功(gong)效為(wei)2～3KW的380V異步電(dian)動三輪(lun)式(shi)機，移(yi)相電(dian)感的數量需(xu)做到(dao)200～300 uF或(huo)更(geng)強，會因為(wei)耐壓(ya)試驗高，故量大，報(bao)價高。而用繼承(cheng)法則免移(yi)相電(dian)感，經證明，當電(dian)動三輪(lun)式(shi)機采用了“△接”時(shi)，鉆速不達到(dao)1500轉(zhuan)/分，發動控制系統能有用地與之配合任務。

注：針對于三相(xiang)(xiang)四線(xian)四線(xian)制異步(bu)自(zi)驅(qu)力認(ren)為(wei)，應該每kW的電(dian)機額定(ding)功率值電(dian)流(liu)量量約(yue)為(wei)2A，即2.2kW的三相(xiang)(xiang)四線(xian)四線(xian)制異步(bu)自(zi)驅(qu)力的電(dian)機額定(ding)功率值電(dian)流(liu)量量約(yue)為(wei)4.4A。