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天津廠家供應伯納德普通角行程電動執行機構
調節器(qi)(qi)(qi)或變送(song)器(qi)(qi)(qi)的(de)(de)模(mo)擬(ni)信(xin)(xin)(xin)號經模(mo)數轉(zhuan)換(huan)后進入(ru)位(wei)(wei)置(zhi)(zhi)(zhi)定位(wei)(wei)器(qi)(qi)(qi),位(wei)(wei)置(zhi)(zhi)(zhi)定位(wei)(wei)器(qi)(qi)(qi)的(de)(de)微機(ji)定期檢(jian)測(ce)這個輸(shu)(shu)(shu)入(ru)信(xin)(xin)(xin)號和位(wei)(wei)置(zhi)(zhi)(zhi)反饋(kui)信(xin)(xin)(xin)號,當(dang)兩個信(xin)(xin)(xin)號不平(ping)衡時(shi),偏(pian)差- - 旦超出列區,立刻發出放(fang)大的(de)(de)控(kong)制信(xin)(xin)(xin)號,驅動智能(neng)位(wei)(wei)置(zhi)(zhi)(zhi)定位(wei)(wei)器(qi)(qi)(qi)中的(de)(de)三相可(ke)逆固體繼電器(qi)(qi)(qi)或可(ke)控(kong)硅,使其導(dao)通帶(dai)(dai)動電機(ji)向(xiang)減小(xiao)偏(pian)差方向(xiang)運轉(zhuan),進而(er)帶(dai)(dai)動減速機(ji)構井改變閥(fa)(fa)i門的(de)(de)開(kai)充。與(yu)(yu)此同(tong)時(shi),微機(ji)也(ye)將閥(fa)(fa)門]開(kai)度(du)的(de)(de)位(wei)(wei)置(zhi)(zhi)(zhi)信(xin)(xin)(xin)號轉(zhuan)換(huan)為(wei)數字脈沖信(xin)(xin)(xin)號送(song)往顯示器(qi)(qi)(qi),從(cong)數顯窗可(ke)觀(guan)察閥(fa)(fa)[ ]的(de)(de)開(kai)度(du)。同(tong)時(shi)也(ye)輸(shu)(shu)(shu)出- -個以(yi)4- 20mA電流與(yu)(yu)閥(fa)(fa)i ]開(kai)充相對應的(de)(de)模(mo)擬(ni)量信(xin)(xin)(xin)號,引(yin)電流信(xin)(xin)(xin)號與(yu)(yu)輸(shu)(shu)(shu)入(ru)信(xin)(xin)(xin)號*隔離,為(wei)此可(ke)適應各種控(kong)制系(xi)統計(ji)算(suan)機(ji)或DCS系(xi)統。
天津廠家供應伯納德普通角行程電動執行機構
位(wei)置定位(wei)器和位(wei)置控制器
比(bi)例(li)調節型的(de)(de)(de)(de)位(wei)(wei)(wei)置(zhi)定位(wei)(wei)(wei)器是將上位(wei)(wei)(wei)機(ji)(ji)器(如計(ji)算機(ji)(ji))發出的(de)(de)(de)(de)模擬量信(xin)號(hao)進(jin)行(xing)比(bi)較(jiao)、邏(luo)輯變換放大、驅動(dong)電機(ji)(ji)按信(xin)號(hao)大小比(bi)例(li)動(dong)作。遠控(kong)(kong)型執(zhi)行(xing)機(ji)(ji)構(gou)(gou)的(de)(de)(de)(de)位(wei)(wei)(wei)置(zhi)控(kong)(kong)制器是根據上位(wei)(wei)(wei)機(ji)(ji)的(de)(de)(de)(de)開關(guan)量信(xin)號(hao)有、無來(lai)控(kong)(kong)制執(zhi)行(xing)機(ji)(ji)構(gou)(gou)運轉(zhuan)和(he)(he)停止。整(zheng)體比(bi)例(li)調節型位(wei)(wei)(wei)置(zhi)定位(wei)(wei)(wei)器的(de)(de)(de)(de)電路GMAX和(he)(he)遠控(kong)(kong)型控(kong)(kong)制器的(de)(de)(de)(de)邏(luo)輯控(kong)(kong)制電路,在結構(gou)(gou)上均裝在位(wei)(wei)(wei)置(zhi)定位(wei)(wei)(wei)控(kong)(kong)制箱內。
對(dui)于遠(yuan)控型執行(xing)機構(gou)(gou),其角度傳感(gan)器(qi)(qi)的導電(dian)塑料電(dian)位器(qi)(qi)與電(dian)流變(bian)換器(qi)(qi)TAM相連接,也可以由(you)外部提供(gong)12V - 36VDC形 成兩線(xian)制(zhi)4 - 20mA電(dian)流變(bian)化,即(ji)為執行(xing)機構(gou)(gou)位置信號輸(shu)出(chu)電(dian)流。
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