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應用范(fan)圍

■三相50HZ，額定(ding)(ding)電壓0.4KV、3KV、6KV、10KV，額定(ding)(ding)功率200～35000KW各類負載的鼠籠異步(同(tong)步)電動機。

工作(zuo)原理

■原理：通過閉(bi)環控制系統，調(diao)整自(zi)耦直(zhi)流(liu)磁繞組中直(zhi)流(liu)電流(liu)的大小，平滑改(gai)變磁控電抗器(qi)的感抗，使感抗在預(yu)定的時間內由大到小自(zi)動無(wu)極減小，實現電動機軟起動。

■組(zu)成：該產品裝置由三部分組(zu)成;

A、高(gao)壓工作(zuo)繞組

B、自耦直流勵磁繞組

C、二次控制回路

圖1 高壓自勵式磁控軟起動原理框圖

感抗計算公式：XL=ωL=μ·W·C………………①

公式中：XL：高壓繞組的阻抗。

μ：鐵芯的磁導率

w：頻率(lv)，即2πf，常(chang)數。

c：常數(shu)，由(you)鐵芯材料及(ji)繞組匝(za)數(shu)決定。

■自勵磁(ci)控制軟起動(dong)的(de)工作原理就(jiu)是通過改(gai)變自耦直(zhi)流(liu)(liu)勵磁(ci)繞組中直(zhi)流(liu)(liu)電(dian)流(liu)(liu)大小(xiao)(xiao)改(gai)變①式(shi)中μ的(de)大小(xiao)(xiao)，來改(gai)變串接于電(dian)動(dong)機(ji)定子回路的(de)繞組阻抗XL，達到軟起動(dong)的(de)目的(de)。

■公式中μ的(de)大(da)(da)小(xiao)(xiao)由自耦控(kong)(kong)制(zhi)繞組中直(zhi)流(liu)電流(liu)的(de)大(da)(da)小(xiao)(xiao)決定(ding)，直(zhi)流(liu)越(yue)大(da)(da)，μ越(yue)小(xiao)(xiao)，XL越(yue)小(xiao)(xiao);直(zhi)流(liu)越(yue)小(xiao)(xiao)，μ越(yue)大(da)(da)，XL越(yue)大(da)(da)，直(zhi)流(liu)電流(liu)的(de)大(da)(da)小(xiao)(xiao)是通過改變(bian)二次控(kong)(kong)制(zhi)回(hui)路中可(ke)控(kong)(kong)硅的(de)導通角來實現的(de)。

■工(gong)作過(guo)(guo)程如下：在電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)前，通(tong)過(guo)(guo)人機(ji)界面設(she)置(zhi)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)參數，把期(qi)望的(de)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)(liu)寫(xie)進磁控(kong)(kong)(kong)控(kong)(kong)(kong)制(zhi)(zhi)器。電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)時，通(tong)過(guo)(guo)閉環互感(gan)器取樣，磁控(kong)(kong)(kong)控(kong)(kong)(kong)制(zhi)(zhi)器比較設(she)置(zhi)電(dian)(dian)(dian)流(liu)(liu)和實(shi)際起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)(liu)后發出觸(chu)發脈沖，通(tong)過(guo)(guo)調節可控(kong)(kong)(kong)硅的(de)導(dao)通(tong)角控(kong)(kong)(kong)制(zhi)(zhi)磁控(kong)(kong)(kong)軟啟動(dong)(dong)(dong)(dong)(dong)裝置(zhi)阻(zu)抗大小，從而改變(bian)電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)的(de)端電(dian)(dian)(dian)壓，實(shi)現電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)的(de)恒(heng)流(liu)(liu)軟起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)。如果現場工(gong)況改變(bian)或起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)(liu)并(bing)不合理，只需重新設(she)置(zhi)起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)(liu)值，即可實(shi)現電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)在新的(de)設(she)定值下實(shi)現恒(heng)流(liu)(liu)軟起(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)。

性能特(te)點

■自勵式電抗器，不需(xu)大(da)容量勵磁電源;

■采用緊(jin)耦合結構，可控性(xing)好，阻(zu)抗(kang)可調至初(chu)始阻(zu)抗(kang)的2%;

■襄陽磁控軟啟動裝置,襄陽磁控軟啟動裝置廠家采用專門的濾波裝置，無諧波污染;

■磁(ci)(ci)屏蔽技術，無漏磁(ci)(ci);

■采用國(guo)內的計算(suan)機仿真(zhen)技術，使(shi)整(zheng)個起動(dong)過程可(ke)(ke)(ke)預測(ce)、可(ke)(ke)(ke)控制、可(ke)(ke)(ke)調(diao)整(zheng);

■可選擇(ze)三種起動電(dian)流曲線：恒流、斜坡、突跳(tiao)，以滿(man)足不同工況(kuang)的要求;

■友好的(de)人機界面，起動(dong)參(can)數的(de)設(she)定、調整靈活(huo)，方便查閱起動(dong)過去曲線;

■起動電(dian)流可在1.5le～4le任意(yi)選擇(ze)(視負(fu)載(zai)不同)，起動時(shi)可確保電(dian)網壓降小，無二次浪涌電(dian)流沖(chong)擊;

■起動時(shi)電機均勻(yun)加速，無機械沖擊;

■重(zhong)復(fu)使用(yong)性能好，起(qi)動性能不(bu)受環(huan)境溫(wen)度影(ying)響;

■免維護，使(shi)用壽命長;

■可(ke)(ke)實現軟停止(可(ke)(ke)選(xuan))。

四、主要技術參數(shu)

七、 執(zhi)行標準

■《3-35 KV交流金(jin)屬(shu)封閉(bi)開關設備》 GB3906-2006

■《電控(kong)設備(bei)，第二部分(fen)：裝(zhuang)有電子器件的(de)電控(kong)設備(bei)》 GB3979-1989

■《外殼防護等級，IP代碼(ma)》 GB4208-1993

八、環境條件(jian)

■溫度：-30℃～40℃

■空(kong)氣相(xiang)對(dui)濕度不(bu)超過90%

■海拔高(gao)度不(bu)超(chao)過(guo)1000m，超(chao)過(guo)時應提供海拔高(gao)度;

■安裝(zhuang)地點(dian)無腐蝕金屬或破壞絕緣的氣體;

九(jiu)、產品規格