一、軟啟動器是怎么工作的
軟啟動(dong)器(qi)是通(tong)過控制可控硅的導通(tong)角來(lai)控制輸(shu)出電壓(ya)。因此,軟啟動(dong)器(qi)從本質(zhi)上是一種(zhong)能(neng)夠(gou)自動(dong)控制的降(jiang)壓(ya)啟動(dong)器(qi),由于能(neng)夠(gou)任意調節輸(shu)出電壓(ya),作電流閉環控制,因而比(bi)傳統(tong)的降(jiang)壓(ya)啟動(dong)方式有更(geng)多優(you)點。例如滿載啟動(dong)風機(ji)水泵等變(bian)轉(zhuan)矩(ju)負載、實現電機(ji)軟停(ting)止、應用于水泵能(neng)完全消除水錘效應等。
二、軟啟動器的作用有哪些
軟啟動器的作用是實現(xian)整個啟動過程中無沖(chong)擊(ji)而平滑。
軟啟(qi)(qi)(qi)(qi)動(dong)器是通過控制可(ke)控硅(gui)的導(dao)通角來(lai)控制輸(shu)出電(dian)壓(ya)(ya)。因(yin)此,軟啟(qi)(qi)(qi)(qi)動(dong)器從本質上(shang)是一種能(neng)夠自(zi)動(dong)控制的降壓(ya)(ya)啟(qi)(qi)(qi)(qi)動(dong)器,由(you)于能(neng)夠任(ren)意調節輸(shu)出電(dian)壓(ya)(ya),作電(dian)流閉(bi)環控制,因(yin)而比傳統(tong)的降壓(ya)(ya)啟(qi)(qi)(qi)(qi)動(dong)方式(如(ru)串電(dian)阻啟(qi)(qi)(qi)(qi)動(dong),自(zi)耦變壓(ya)(ya)器啟(qi)(qi)(qi)(qi)動(dong)等)有更多(duo)優點。
例(li)如滿載(zai)啟(qi)動風機水泵等變(bian)轉(zhuan)矩負載(zai)、實現電機軟停止、應用于水泵能完(wan)全消除水錘效應等。
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、軟啟動器應安裝牢(lao)固保證外(wai)殼接(jie)地,一次接(jie)線:R.S.T為進(jin)線端(duan),U.V.W為出(chu)線端(duan),另有PE端(duan)應與(yu)主PE排接(jie)地。
2、二次(ci)接線:根(gen)據客戶要求針對說明(ming)書(shu)選擇相(xiang)應(ying)的(de)控制方式,最簡單常用的(de)方式是將啟(qi)動和停(ting)止信號(hao)端子(zi)短接起來,中間加一個啟(qi)動繼電器的(de)NO點與(yu)COM相(xiang)連(lian)接。
3、當NO點(dian)(dian)閉(bi)合(he)軟啟動,當NO點(dian)(dian)斷(duan)開,軟啟動停止運行。另有旁(pang)路(lu)接(jie)(jie)線(xian)端子,接(jie)(jie)旁(pang)路(lu)接(jie)(jie)觸器線(xian)圈(quan)。還有故(gu)障(zhang)接(jie)(jie)線(xian)端子,一定要清楚(chu)故(gu)障(zhang)點(dian)(dian)是開點(dian)(dian)還是閉(bi)點(dian)(dian),如(ru)果是閉(bi)點(dian)(dian)還要加一個故(gu)障(zhang)繼電器。
四、軟啟動器需要設置哪些參數
一般系(xi)統參(can)(can)(can)數是廠(chang)家內部的一些(xie)參(can)(can)(can)數,作為用戶是不(bu)(bu)需(xu)要(yao)調(diao)的。保(bao)(bao)護(hu)(hu)參(can)(can)(can)數有,欠壓保(bao)(bao)護(hu)(hu)、缺相(xiang)(xiang)保(bao)(bao)護(hu)(hu)、過(guo)流(liu)保(bao)(bao)護(hu)(hu)、相(xiang)(xiang)電流(liu)不(bu)(bu)平衡(heng)保(bao)(bao)護(hu)(hu)。這些(xie)參(can)(can)(can)數出廠(chang)的時候基本已經設(she)置好了,用戶不(bu)(bu)需(xu)要(yao)做大的改動。只有啟(qi)(qi)動參(can)(can)(can)數是要(yao)根據(ju)實際(ji)啟(qi)(qi)動負載做相(xiang)(xiang)應的調(diao)整。啟(qi)(qi)動參(can)(can)(can)數包括啟(qi)(qi)動方式、初始電壓、限流(liu)倍數等,最常設(she)置的也是這幾種參(can)(can)(can)數。
1、起動(dong)(dong)(dong)方式一般有電壓斜坡(po)(po)起動(dong)(dong)(dong)、限流起動(dong)(dong)(dong)、斜坡(po)(po)限流起動(dong)(dong)(dong)、突調(diao)電壓起動(dong)(dong)(dong)等。
2、初始(shi)電壓太(tai)(tai)小(xiao)(xiao)軟啟動(dong)器(qi)(qi)起動(dong)電機只聽電機嗡(weng)嗡(weng)響電機不轉,這說明(ming)力矩太(tai)(tai)小(xiao)(xiao),初始(shi)電壓太(tai)(tai)大(da)軟啟動(dong)器(qi)(qi)起動(dong)電機又太(tai)(tai)猛(meng),失去了軟起動(dong)的效果,所(suo)以初始(shi)電壓大(da)小(xiao)(xiao)根據負載輕(qing)重做(zuo)適當(dang)的修(xiu)改。
3、限流(liu)倍(bei)(bei)數是(shi)指起動電(dian)(dian)(dian)機時(shi)(shi)候,瞬間電(dian)(dian)(dian)流(liu)控(kong)制(zhi)在額(e)定(ding)電(dian)(dian)(dian)流(liu)的(de)(de)倍(bei)(bei)數內(nei),例如(ru),75KW軟(ruan)啟動器限流(liu)倍(bei)(bei)數設(she)(she)(she)置成3,380V75KW軟(ruan)啟動器額(e)定(ding)電(dian)(dian)(dian)流(liu)是(shi)150A,那(nei)么起動時(shi)(shi)候,電(dian)(dian)(dian)機電(dian)(dian)(dian)流(liu)控(kong)制(zhi)在450A以(yi)內(nei)。限流(liu)倍(bei)(bei)數設(she)(she)(she)置過大,對電(dian)(dian)(dian)網沖擊較大,設(she)(she)(she)置過小,電(dian)(dian)(dian)機啟動不起來(lai)(lai),所(suo)以(yi)這個要根據(ju)實際情況設(she)(she)(she)置;軟(ruan)停車功(gong)能,是(shi)需要電(dian)(dian)(dian)機緩(huan)慢停下來(lai)(lai)的(de)(de)場合(he)進行(xing)設(she)(she)(she)置的(de)(de)。如(ru)深(shen)井泵(beng),皮帶機。其余地方(fang)用(yong)的(de)(de)比(bi)較少。