穩壓器的原理
最初的電(dian)(dian)力(li)穩壓器(qi)(qi)是(shi)(shi)(shi)靠繼(ji)電(dian)(dian)器(qi)(qi)的跳動(dong)穩定電(dian)(dian)壓的,當(dang)電(dian)(dian)網(wang)電(dian)(dian)壓出(chu)現(xian)波動(dong)時,電(dian)(dian)力(li)穩壓器(qi)(qi)的自動(dong)糾正(zheng)電(dian)(dian)路啟動(dong),使內部繼(ji)電(dian)(dian)器(qi)(qi)動(dong)作。迫(po)使輸出(chu)電(dian)(dian)壓保持在設定值附近,這種電(dian)(dian)路優點(dian)是(shi)(shi)(shi)電(dian)(dian)路簡單,缺點(dian)是(shi)(shi)(shi)穩壓精度(du)不(bu)高(gao)并(bing)且每一次繼(ji)電(dian)(dian)器(qi)(qi)跳動(dong)換擋,都會使供(gong)電(dian)(dian)電(dian)(dian)源發生(sheng)一次瞬時的中斷并(bing)產(chan)生(sheng)火花干擾。
現在(zai)的(de)穩壓(ya)器工(gong)作原理比較簡(jian)單,它是由調(diao)壓(ya)電(dian)(dian)路、控制電(dian)(dian)路、及伺服電(dian)(dian)機(ji)(ji)等部件(jian)組成,當輸入電(dian)(dian)壓(ya)或負(fu)載變(bian)化時(shi),控制電(dian)(dian)路進行取樣、比較、放大,然(ran)后驅動(dong)(dong)伺服電(dian)(dian)機(ji)(ji)轉動(dong)(dong),使調(diao)壓(ya)器碳(tan)刷的(de)位(wei)置改變(bian),通過自動(dong)(dong)調(diao)整線圈匝數比,從而保持輸出電(dian)(dian)壓(ya)的(de)穩定。容量較大的(de)穩壓(ya)器,還(huan)采用電(dian)(dian)壓(ya)補償的(de)原理工(gong)作。
穩壓器有什么用
穩壓器是一種能自動調整輸出電壓的供電電路或供電設備,其作用是將波動較大和達不到電器設備要求的電源電壓穩定在它的設定值范圍內,使各種電路或電器設備能在額定工作電壓下正常工作。高質量的穩壓器品牌產品,大多采用電(dian)機拖動碳刷的方法穩(wen)定電(dian)壓,這(zhe)種穩(wen)壓器(qi)對電(dian)器(qi)設(she)備產生的干擾(rao)很小(xiao)穩(wen)壓精度(du)相對較高。
穩壓器怎么使用
先把(ba)電(dian)(dian)器(qi)的電(dian)(dian)源(yuan)接(jie)在穩(wen)壓(ya)器(qi)上,然后(hou)再打開穩(wen)壓(ya)器(qi)的電(dian)(dian)源(yuan)開關(guan),檢測是否(fou)可以(yi)正常使(shi)用(yong),檢測完后(hou)就(jiu)可以(yi)將(jiang)大功率負載接(jie)在穩(wen)壓(ya)器(qi)上了。注意,當電(dian)(dian)器(qi)長時(shi)間不用(yong)時(shi),要把(ba)穩(wen)壓(ya)器(qi)的電(dian)(dian)源(yuan)切(qie)斷,這樣才能延長穩(wen)壓(ya)器(qi)的使(shi)用(yong)壽命。
穩壓器的保養方法
1、穩(wen)壓器的功率應(ying)大于用(yong)(yong)電設備的總(zong)功率,使(shi)用(yong)(yong)時,應(ying)放置(zhi)在通(tong)風、干燥、無(wu)陽光(guang)直射(she)、無(wu)腐蝕性氣體的室(shi)內使(shi)用(yong)(yong)。
2、經常(chang)觀察穩壓(ya)器的冷(leng)卻(que)風扇(shan)和傳動機構是否運行正(zheng)常(chang),查看輸入(ru)電壓(ya)和負載是否超過額定范(fan)圍,發現異常(chang)及時處(chu)理。
3、穩壓(ya)器開(kai)(kai)關(guan)(guan)不(bu)宜作設(she)備的(de)總開(kai)(kai)關(guan)(guan)使用,使用時(shi),應先打(da)開(kai)(kai)穩壓(ya)器開(kai)(kai)關(guan)(guan),待有電(dian)源輸出后,再依次從按功率(lv)小(xiao)到(dao)大(da)(da)接上(shang)不(bu)同(tong)的(de)用電(dian)設(she)備,關(guan)(guan)機時(shi)從大(da)(da)到(dao)小(xiao)關(guan)(guan)機,最(zui)后關(guan)(guan)上(shang)穩壓(ya)器的(de)開(kai)(kai)關(guan)(guan)。