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    交流固態(tài)繼電器

    2019/8/20 8:18:49      點擊:
    交流固態(tài)繼電器ssr(solid state releys)是一種無觸點通斷電子開關(guān),它利用電子元件(如開關(guān)三極管、雙向可控硅等半導(dǎo)體器件)的開關(guān)特性,可達到無觸點無火花地接通和斷開電路的目的,為四端有源器件,其中兩個端子為輸入控制端,另外兩端為輸出受控端。為實現(xiàn)輸入與輸出之間的電氣隔離,器件中采用了高耐壓的專業(yè)光電耦合器。當(dāng)施加輸入信號后,其主回路呈導(dǎo)通狀態(tài),無信號時呈阻斷狀態(tài)。整個器件無可動部件及觸點,可實現(xiàn)相當(dāng)于常用電磁繼電器一樣的功能。其封裝形式也與傳統(tǒng)電磁繼電器基本相同。它問世于70年代,由于它的無觸點工作特性,使其在許多領(lǐng)域的電控及計算機控制方面得到日益廣范的應(yīng)用。
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