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、加電阻法(fa)
此刻馬達(da)的(de)轉換工率為(wei)標稱工率的(de)55%~90%。C1為(wei)行駛電場(chang)(chang)所器(qi)(qi)(qi)(電場(chang)(chang)所器(qi)(qi)(qi)器(qi)(qi)(qi)),C2為(wei)進行電場(chang)(chang)所器(qi)(qi)(qi)(電場(chang)(chang)所器(qi)(qi)(qi)器(qi)(qi)(qi)),都需選用(yong)供用(yong)電電場(chang)(chang)所器(qi)(qi)(qi)(電場(chang)(chang)所器(qi)(qi)(qi)器(qi)(qi)(qi))器(qi)(qi)(qi),其(qi)耐(nai)壓試驗值肯(ken)定不降到(dao)450V。C1、C2的(de)存(cun)儲容量可輕按式估計(ji):
C1=1950I/U×cosθ
C2=(1~4)C1
式中C的院校為(wei)(wei)(uF)、I為(wei)(wei)直流(liu)電機馬達額(e)定容量(liang)(liang)工(gong)(gong)作效率(lv)(lv)額(e)定容量(liang)(liang)電流(liu)(A)、U為(wei)(wei)直流(liu)電機馬達額(e)定容量(liang)(liang)工(gong)(gong)作效率(lv)(lv)額(e)定容量(liang)(liang)(V)、cosθ為(wei)(wei)工(gong)(gong)作效率(lv)(lv)條(tiao)件,大部分取0.5~0.7。
很大(da)(da)地,對於(wu)輸(shu)出(chu)為1KW以內的(de)相電壓異步自傾向,應該不用(yong)了(le)C2,但C1各值(zhi)要適宜曾大(da)(da)。可按(an)C1=13I估量添加(jia),式中C1的(de)公司(si)的(de)為(uF),I為原自傾向的(de)額(e)定功率電流量(A)。濾波電容的(de)使用(yong)量采用(yong)剛好合適,反之(zhi)自傾向沒能正常情況運(yun)轉(zhuan)和表面溫(wen)度(du)過高。
面(mian)對只要一千(qian)瓦(wa)的(de)小(xiao)輸出耗油率三相電(dian)異步自(zi)驅動力(li),濾(lv)(lv)波(bo)(bo)濾(lv)(lv)波(bo)(bo)電(dian)容(濾(lv)(lv)波(bo)(bo)電(dian)容器(qi))出水量(liang)可按(an)C=0.06P(Y接時)和C=0.1P(△接時)選中,式中C的(de)廠(chang)家為(wei)(wei)(uF),P為(wei)(wei)發電(dian)機輸出耗油率(W)。C1、C2出水量(liang)可能同樣(yang),如(ru)速比太快,需加(jia)(jia)上大強度或減少濾(lv)(lv)波(bo)(bo)濾(lv)(lv)波(bo)(bo)電(dian)容(濾(lv)(lv)波(bo)(bo)電(dian)容器(qi))出水量(liang),如(ru)速比有點慢,可減少強度或加(jia)(jia)上大濾(lv)(lv)波(bo)(bo)濾(lv)(lv)波(bo)(bo)電(dian)容(濾(lv)(lv)波(bo)(bo)電(dian)容器(qi))出水量(liang)。
二、完(wan)善的加電阻法
為了讓提高了直流(liu)電(dian)思想的輸入功效(xiao),C1的選中同“的辦法(fa)一”中的C1,C2、C3、R按緊式選中:
C2=(2~4)C1
C3=2C1
R=0.25U/I
三、供電阻(zu)法
功率電阻功率R的選型要(yao)巧妙(miao)。R值(zhi)先選為兩相電機繞線的功率電阻功率值(zhi)的5~10倍。
四(si)、電容器、電感(gan)移相法(fa)
按照(zhao)一(yi)(yi)直電(dian)(dian)感(gan)(應注意力電(dian)(dian)感(gan)L的(de)載(zai)流業務能力)和一(yi)(yi)套濾(lv)(lv)波(bo)濾(lv)(lv)波(bo)電(dian)(dian)容(rong)器(qi)從(cong)兩相(xiang)電(dian)(dian)電(dian)(dian)源開關爭取三相(xiang)直流電(dian)(dian)機對(dui)(dui)稱軸電(dian)(dian)流值,啟動(dong)(dong)(dong)圖的(de)方式(shi) 接(jie)電(dian)(dian)源,這(zhe)樣方式(shi) 適(shi)應性更強,但(dan)要顯(xian)卡配置鐵芯電(dian)(dian)感(gan),也應該用(yong)兩相(xiang)電(dian)(dian)自耦調壓(ya)器(qi)來(lai)代用(yong)。這(zhe)對(dui)(dui)于(yu)比較大的(de)電(dian)(dian)動(dong)(dong)(dong)伸縮機宜(yi)按照(zhao)此法。列如,當直流電(dian)(dian)機為(wei)2.2KW按照(zhao)“△接(jie)”時,濾(lv)(lv)波(bo)濾(lv)(lv)波(bo)電(dian)(dian)容(rong)器(qi)C選254uF,電(dian)(dian)感(gan)L的(de)選擇78mH。濾(lv)(lv)波(bo)濾(lv)(lv)波(bo)電(dian)(dian)容(rong)器(qi)C,電(dian)(dian)感(gan)L可啟動(dong)(dong)(dong)式(shi)的(de)選擇:
C=(Ssin(60+φ)×10^6)/(1.5WU^2)
L=(1.5U^2)/(WSsin(60-φ))
式中(zhong)C的上班電(dian)容器存儲容量為(uF);L:電(dian)感量(H);S:智能式機電(dian)機額定最大功(gong)率值工(gong)作效率(VA);φ:智能式機電(dian)機額定最大功(gong)率值電(dian)機負載時的工(gong)作效率質數角(度(du));W:角幀(zhen)率(W=2πF=314)
五、加開關按鈕法
裝發動開(kai)關按(an)鈕K,便能夠(gou)是接入兩相電運營。
六、電子廠操縱法
相(xiang)對輸(shu)出(chu)為2~3KW的三相(xiang)電(dian)異(yi)步直(zhi)流電(dian)因素,移(yi)相(xiang)電(dian)解電(dian)容(電(dian)解電(dian)容器(qi)(qi))的使用(yong)量(liang)需實現200~300 uF或大些,由耐沖(chong)擊(ji)高,故空間大,多少錢(qian)高。而(er)用(yong)公司法則免(mian)移(yi)相(xiang)電(dian)解電(dian)容(電(dian)解電(dian)容器(qi)(qi)),經證明信(xin),當直(zhi)流電(dian)因素用(yong)“△接”時,轉(zhuan)速不超出(chu)1500轉(zhuan)/分,運行裝(zhuang)置能有效地地與之結合業(ye)務。
注:我(wo)認(ren)為380V異步(bu)電(dian)(dian)動(dong)式三輪(lun)機我(wo)認(ren)為,平常每kW的額(e)定(ding)容量負(fu)(fu)載電(dian)(dian)壓(ya)電(dian)(dian)壓(ya)約(yue)(yue)為2A,即(ji)2.2kW的380V異步(bu)電(dian)(dian)動(dong)式三輪(lun)機的額(e)定(ding)容量負(fu)(fu)載電(dian)(dian)壓(ya)電(dian)(dian)壓(ya)約(yue)(yue)為4.4A。