一、軟啟動器是怎么工作的
軟啟(qi)動(dong)器是(shi)通(tong)過控制可控硅(gui)的導通(tong)角(jiao)來(lai)控制輸出(chu)(chu)電(dian)壓(ya)(ya)。因此,軟啟(qi)動(dong)器從本質(zhi)上是(shi)一種能(neng)夠自動(dong)控制的降(jiang)壓(ya)(ya)啟(qi)動(dong)器,由于(yu)(yu)能(neng)夠任(ren)意調節輸出(chu)(chu)電(dian)壓(ya)(ya),作電(dian)流閉環控制,因而比傳統的降(jiang)壓(ya)(ya)啟(qi)動(dong)方式有更(geng)多優點。例如滿(man)載啟(qi)動(dong)風(feng)機水(shui)泵等變轉矩負(fu)載、實現電(dian)機軟停止、應(ying)用于(yu)(yu)水(shui)泵能(neng)完全(quan)消(xiao)除水(shui)錘(chui)效應(ying)等。
二、軟啟動器的作用有哪些
軟啟動(dong)(dong)器的(de)作用是實現整個啟動(dong)(dong)過程中無沖擊而(er)平滑。
軟啟(qi)(qi)動(dong)器是通過控(kong)(kong)(kong)制(zhi)可(ke)控(kong)(kong)(kong)硅的(de)導通角來控(kong)(kong)(kong)制(zhi)輸(shu)(shu)出電壓(ya)(ya)。因此(ci),軟啟(qi)(qi)動(dong)器從本質上是一種能夠(gou)自動(dong)控(kong)(kong)(kong)制(zhi)的(de)降壓(ya)(ya)啟(qi)(qi)動(dong)器,由于(yu)能夠(gou)任意調節輸(shu)(shu)出電壓(ya)(ya),作電流閉環控(kong)(kong)(kong)制(zhi),因而比傳統的(de)降壓(ya)(ya)啟(qi)(qi)動(dong)方式(shi)(如(ru)串(chuan)電阻啟(qi)(qi)動(dong),自耦變壓(ya)(ya)器啟(qi)(qi)動(dong)等)有更多優(you)點。
例(li)如滿載啟動風機水(shui)泵等變轉矩負載、實(shi)現電機軟停止、應用于水(shui)泵能(neng)完全消除(chu)水(shui)錘效應等。
感興趣的話可以到軟啟動器十大品牌了解更多哦。
三、軟啟動器接線方法是什么
1、軟啟動(dong)器應安裝牢固保證外(wai)殼接(jie)地,一次接(jie)線:R.S.T為(wei)進線端(duan),U.V.W為(wei)出線端(duan),另有PE端(duan)應與(yu)主PE排接(jie)地。
2、二(er)次接線:根據客(ke)戶要求(qiu)針對說(shuo)明書選(xuan)擇相應的(de)控制(zhi)方式(shi)(shi),最簡單常(chang)用的(de)方式(shi)(shi)是將啟動和停止信(xin)號端(duan)子短接起來,中(zhong)間加一個啟動繼電(dian)器的(de)NO點與COM相連(lian)接。
3、當(dang)NO點(dian)閉合軟(ruan)啟動,當(dang)NO點(dian)斷開,軟(ruan)啟動停止運行。另有旁路(lu)接(jie)線(xian)端(duan)子(zi)(zi),接(jie)旁路(lu)接(jie)觸器線(xian)圈。還有故障接(jie)線(xian)端(duan)子(zi)(zi),一(yi)定要(yao)清(qing)楚(chu)故障點(dian)是(shi)開點(dian)還是(shi)閉點(dian),如果是(shi)閉點(dian)還要(yao)加一(yi)個(ge)故障繼電(dian)器。
四、軟啟動器需要設置哪些參數
一(yi)般(ban)系統參(can)(can)數(shu)(shu)是(shi)(shi)廠家(jia)內(nei)部的一(yi)些(xie)(xie)參(can)(can)數(shu)(shu),作為用戶(hu)是(shi)(shi)不需要(yao)調的。保(bao)護參(can)(can)數(shu)(shu)有(you),欠壓保(bao)護、缺相保(bao)護、過流保(bao)護、相電流不平衡保(bao)護。這(zhe)些(xie)(xie)參(can)(can)數(shu)(shu)出廠的時候基(ji)本(ben)已(yi)經設置好了,用戶(hu)不需要(yao)做大的改動(dong)(dong)。只有(you)啟(qi)動(dong)(dong)參(can)(can)數(shu)(shu)是(shi)(shi)要(yao)根據實(shi)際啟(qi)動(dong)(dong)負載做相應的調整(zheng)。啟(qi)動(dong)(dong)參(can)(can)數(shu)(shu)包括(kuo)啟(qi)動(dong)(dong)方(fang)式、初始電壓、限流倍數(shu)(shu)等,最常設置的也是(shi)(shi)這(zhe)幾種參(can)(can)數(shu)(shu)。
1、起(qi)動方式一般有電壓斜(xie)坡(po)起(qi)動、限流起(qi)動、斜(xie)坡(po)限流起(qi)動、突調電壓起(qi)動等。
2、初(chu)(chu)始電(dian)壓太(tai)小軟啟(qi)動(dong)(dong)器(qi)起(qi)(qi)(qi)動(dong)(dong)電(dian)機(ji)只聽電(dian)機(ji)嗡嗡響電(dian)機(ji)不轉,這說明力(li)矩(ju)太(tai)小,初(chu)(chu)始電(dian)壓太(tai)大軟啟(qi)動(dong)(dong)器(qi)起(qi)(qi)(qi)動(dong)(dong)電(dian)機(ji)又太(tai)猛,失(shi)去了軟起(qi)(qi)(qi)動(dong)(dong)的(de)效果,所以初(chu)(chu)始電(dian)壓大小根(gen)據(ju)負(fu)載輕重做適當的(de)修改。
3、限(xian)(xian)流(liu)(liu)(liu)(liu)倍數(shu)(shu)是(shi)指(zhi)起動電(dian)(dian)機(ji)(ji)時(shi)候,瞬間電(dian)(dian)流(liu)(liu)(liu)(liu)控制在額定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)的(de)倍數(shu)(shu)內,例如,75KW軟(ruan)啟(qi)(qi)動器(qi)限(xian)(xian)流(liu)(liu)(liu)(liu)倍數(shu)(shu)設置成3,380V75KW軟(ruan)啟(qi)(qi)動器(qi)額定(ding)電(dian)(dian)流(liu)(liu)(liu)(liu)是(shi)150A,那么起動時(shi)候,電(dian)(dian)機(ji)(ji)電(dian)(dian)流(liu)(liu)(liu)(liu)控制在450A以內。限(xian)(xian)流(liu)(liu)(liu)(liu)倍數(shu)(shu)設置過大(da),對電(dian)(dian)網(wang)沖擊較(jiao)大(da),設置過小(xiao),電(dian)(dian)機(ji)(ji)啟(qi)(qi)動不(bu)起來,所以這個要(yao)根(gen)據實際(ji)情況設置;軟(ruan)停(ting)車功能,是(shi)需(xu)要(yao)電(dian)(dian)機(ji)(ji)緩(huan)慢停(ting)下來的(de)場(chang)合(he)進行設置的(de)。如深井泵(beng),皮帶機(ji)(ji)。其余(yu)地(di)方用的(de)比較(jiao)少。