一、軟啟動器是怎么工作的
軟(ruan)啟(qi)動(dong)(dong)(dong)器(qi)是通過控(kong)(kong)制可控(kong)(kong)硅的導(dao)通角來控(kong)(kong)制輸(shu)出(chu)電壓(ya)(ya)。因(yin)此,軟(ruan)啟(qi)動(dong)(dong)(dong)器(qi)從本質上是一種(zhong)能夠自動(dong)(dong)(dong)控(kong)(kong)制的降壓(ya)(ya)啟(qi)動(dong)(dong)(dong)器(qi),由(you)于(yu)能夠任(ren)意調節(jie)輸(shu)出(chu)電壓(ya)(ya),作電流閉環控(kong)(kong)制,因(yin)而比傳統(tong)的降壓(ya)(ya)啟(qi)動(dong)(dong)(dong)方式(shi)有更多優點。例如滿載啟(qi)動(dong)(dong)(dong)風(feng)機水(shui)泵(beng)等(deng)變轉矩負載、實(shi)現電機軟(ruan)停止(zhi)、應用(yong)于(yu)水(shui)泵(beng)能完(wan)全消除水(shui)錘效應等(deng)。
二、軟啟動器的作用有哪些
軟啟動(dong)器的作(zuo)用是實現整個(ge)啟動(dong)過程(cheng)中(zhong)無沖(chong)擊而平(ping)滑。
軟啟動(dong)(dong)(dong)器是通(tong)過控(kong)制(zhi)可控(kong)硅的導通(tong)角來控(kong)制(zhi)輸(shu)(shu)出電壓(ya)。因此,軟啟動(dong)(dong)(dong)器從本質上是一種能夠自動(dong)(dong)(dong)控(kong)制(zhi)的降壓(ya)啟動(dong)(dong)(dong)器,由(you)于能夠任意(yi)調節(jie)輸(shu)(shu)出電壓(ya),作電流閉環控(kong)制(zhi),因而比傳(chuan)統的降壓(ya)啟動(dong)(dong)(dong)方式(shi)(如串電阻(zu)啟動(dong)(dong)(dong),自耦變壓(ya)器啟動(dong)(dong)(dong)等)有(you)更(geng)多優點。
例(li)如滿載啟動風機(ji)水泵(beng)等(deng)變轉矩(ju)負(fu)載、實(shi)現電機(ji)軟停止(zhi)、應用于(yu)水泵(beng)能完全消(xiao)除(chu)水錘效應等(deng)。
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(zhuang)牢固保證外殼(ke)接地,一次接線:R.S.T為進線端,U.V.W為出線端,另(ling)有PE端應與主(zhu)PE排接地。
2、二(er)次接(jie)線:根據(ju)客(ke)戶要求針對說明書(shu)選(xuan)擇相應的(de)控制方式(shi),最簡(jian)單常用的(de)方式(shi)是將啟動和停止信號端子短接(jie)起來,中間(jian)加一個啟動繼電器(qi)的(de)NO點與COM相連接(jie)。
3、當NO點閉(bi)合軟啟(qi)動,當NO點斷開,軟啟(qi)動停止運行。另有(you)旁路接(jie)(jie)線端子,接(jie)(jie)旁路接(jie)(jie)觸器(qi)線圈(quan)。還有(you)故(gu)(gu)障(zhang)接(jie)(jie)線端子,一定(ding)要清楚故(gu)(gu)障(zhang)點是(shi)開點還是(shi)閉(bi)點,如果是(shi)閉(bi)點還要加一個故(gu)(gu)障(zhang)繼電(dian)器(qi)。
四、軟啟動器需要設置哪些參數
一般系統參數是(shi)(shi)廠家內部的(de)一些參數,作為用戶(hu)是(shi)(shi)不需(xu)要(yao)調的(de)。保(bao)護(hu)(hu)參數有(you)(you),欠壓保(bao)護(hu)(hu)、缺(que)相(xiang)保(bao)護(hu)(hu)、過流(liu)保(bao)護(hu)(hu)、相(xiang)電(dian)流(liu)不平(ping)衡保(bao)護(hu)(hu)。這些參數出廠的(de)時候(hou)基本已經設置好(hao)了(le),用戶(hu)不需(xu)要(yao)做(zuo)大的(de)改(gai)動。只有(you)(you)啟(qi)動參數是(shi)(shi)要(yao)根據實際啟(qi)動負載做(zuo)相(xiang)應的(de)調整(zheng)。啟(qi)動參數包括啟(qi)動方式、初始電(dian)壓、限流(liu)倍數等,最常設置的(de)也是(shi)(shi)這幾種參數。
1、起(qi)(qi)(qi)動方式(shi)一般有電壓(ya)斜(xie)坡起(qi)(qi)(qi)動、限流起(qi)(qi)(qi)動、斜(xie)坡限流起(qi)(qi)(qi)動、突調電壓(ya)起(qi)(qi)(qi)動等。
2、初(chu)(chu)始電(dian)(dian)壓(ya)太(tai)小軟啟動(dong)器(qi)起動(dong)電(dian)(dian)機只聽電(dian)(dian)機嗡(weng)嗡(weng)響(xiang)電(dian)(dian)機不(bu)轉,這(zhe)說明力矩太(tai)小,初(chu)(chu)始電(dian)(dian)壓(ya)太(tai)大(da)軟啟動(dong)器(qi)起動(dong)電(dian)(dian)機又(you)太(tai)猛,失去(qu)了軟起動(dong)的效果,所(suo)以(yi)初(chu)(chu)始電(dian)(dian)壓(ya)大(da)小根(gen)據負載(zai)輕重做(zuo)適當的修(xiu)改。
3、限(xian)流(liu)(liu)倍數(shu)(shu)(shu)是指起(qi)動電(dian)(dian)(dian)機(ji)時候,瞬(shun)間(jian)電(dian)(dian)(dian)流(liu)(liu)控制在(zai)額(e)定(ding)電(dian)(dian)(dian)流(liu)(liu)的(de)倍數(shu)(shu)(shu)內,例如,75KW軟啟動器限(xian)流(liu)(liu)倍數(shu)(shu)(shu)設(she)(she)置成(cheng)3,380V75KW軟啟動器額(e)定(ding)電(dian)(dian)(dian)流(liu)(liu)是150A,那么起(qi)動時候,電(dian)(dian)(dian)機(ji)電(dian)(dian)(dian)流(liu)(liu)控制在(zai)450A以內。限(xian)流(liu)(liu)倍數(shu)(shu)(shu)設(she)(she)置過(guo)(guo)大(da),對電(dian)(dian)(dian)網沖(chong)擊(ji)較大(da),設(she)(she)置過(guo)(guo)小,電(dian)(dian)(dian)機(ji)啟動不起(qi)來,所以這個要(yao)根據實際情況設(she)(she)置;軟停(ting)車功能(neng),是需要(yao)電(dian)(dian)(dian)機(ji)緩(huan)慢(man)停(ting)下來的(de)場合進行設(she)(she)置的(de)。如深井(jing)泵,皮帶機(ji)。其余地方用的(de)比較少。