兩位五通(tong)(tong)雙電(dian)控電(dian)磁閥動(dong)作原理：給正動(dong)作線圈(quan)通(tong)(tong)電(dian)，則正動(dong)作氣路接(jie)通(tong)(tong)(正動作(zuo)出(chu)氣(qi)孔有氣(qi))，即使給(gei)正動作(zuo)線圈(quan)斷電后正動作(zuo)氣(qi)路仍然是接通的，將會一直(zhi)維持(chi)到給(gei)反動作(zuo)線圈(quan)通電為止。 給反動(dong)作線圈(quan)通(tong)(tong)電，則反動(dong)作氣路接通(tong)(tong)(反動作出氣孔有(you)氣)，即使(shi)給反動(dong)作線(xian)圈斷電(dian)(dian)后反動(dong)作氣路仍然是接通的，將會一(yi)直維持到(dao)給正動(dong)作線(xian)圈通電(dian)(dian)為止。這相當于“自鎖”。 基于兩位五通雙電(dian)控電(dian)磁閥的(de)這種特(te)性，在設(she)計(ji)機電(dian)控制回路或編(bian)制PLC程序(xu)的時候，可以讓電磁閥線圈動作1~2秒就可以了，這樣(yang)可以保(bao)護電磁(ci)閥線圈不容易損(sun)壞。
電(dian)(dian)(dian)磁(ci)閥里有密閉(bi)的(de)(de)腔(qiang)(qiang)，在的(de)(de)不(bu)同(tong)位置開有通(tong)(tong)孔(kong)，每個(ge)孔(kong)都通(tong)(tong)向不(bu)同(tong)的(de)(de)油(you)管，腔(qiang)(qiang)中間是閥，兩面是兩塊電(dian)(dian)(dian)磁(ci)鐵(tie)，哪面的(de)(de)磁(ci)鐵(tie)線(xian)圈通(tong)(tong)電(dian)(dian)(dian)閥體就(jiu)會被吸(xi)引(yin)到哪邊，通(tong)(tong)過(guo)(guo)控制(zhi)(zhi)閥體的(de)(de)移動(dong)(dong)(dong)來檔住或(huo)漏出(chu)不(bu)同(tong)的(de)(de)排油(you)的(de)(de)孔(kong)，而進油(you)孔(kong)是常開的(de)(de)，液壓油(you)就(jiu)會進入不(bu)同(tong)的(de)(de)排油(you)管，然后通(tong)(tong)過(guo)(guo)油(you)的(de)(de)壓力來推動(dong)(dong)(dong)油(you)剛(gang)的(de)(de)活(huo)塞(sai)，活(huo)塞(sai)又帶動(dong)(dong)(dong)活(huo)塞(sai)桿，活(huo)塞(sai)竿帶動(dong)(dong)(dong)機械(xie)裝置動(dong)(dong)(dong)。這(zhe)樣通(tong)(tong)過(guo)(guo)控制(zhi)(zhi)電(dian)(dian)(dian)磁(ci)鐵(tie)的(de)(de)電(dian)(dian)(dian)流就(jiu)控制(zhi)(zhi)了機械(xie)運動(dong)(dong)(dong)。