穩壓器的作用

穩壓(ya)(ya)(ya)(ya)器(qi)是(shi)使輸出電(dian)壓(ya)(ya)(ya)(ya)穩定(ding)的設備。穩壓(ya)(ya)(ya)(ya)器(qi)調(diao)壓(ya)(ya)(ya)(ya)電(dian)路、控制電(dian)路、及伺(si)服電(dian)機等(deng)組成。當輸入(ru)電(dian)壓(ya)(ya)(ya)(ya)或負載變化時，控制電(dian)路進行取(qu)樣、比較、放大(da)，然(ran)后驅(qu)動伺(si)服電(dian)機轉動，使調(diao)壓(ya)(ya)(ya)(ya)器(qi)碳刷的位置(zhi)改變，通過自動調(diao)整線圈匝數比，從而(er)保(bao)持輸出電(dian)壓(ya)(ya)(ya)(ya)的穩定(ding)。家用穩壓(ya)(ya)(ya)(ya)器(qi)的作用：

1.能(neng)把低壓125V－165V或高(gao)壓250V－270V的電(dian)壓穩定在200－230V之(zhi)間，使家用電(dian)器能(neng)正(zheng)常工(gong)作；

2.當輸入電壓(ya)高于255-275V或低于125-160V時，能(neng)自動切斷電源；

3.在(zai)斷電之后又突然來電時(shi)(shi)，可以延時(shi)(shi)5－8分鐘啟動輸出(chu)電源，避免因為電壓過高使電器(qi)受到損傷。在(zai)選(xuan)購家用穩壓器(qi)時(shi)(shi)一定(ding)要注意上述三種基(ji)本功能的完備與否。

穩壓器工作原理

由于部分(fen)電(dian)(dian)(dian)(dian)(dian)器中含有線圈組(zu)件，在通(tong)電(dian)(dian)(dian)(dian)(dian)初(chu)期會產(chan)生阻礙電(dian)(dian)(dian)(dian)(dian)流(liu)的渦流(liu)，渦流(liu)的產(chan)生既會削弱到電(dian)(dian)(dian)(dian)(dian)器啟(qi)動時的瞬(shun)時電(dian)(dian)(dian)(dian)(dian)壓，導(dao)致啟(qi)動緩慢，又會加強斷路后產(chan)生的瞬(shun)時電(dian)(dian)(dian)(dian)(dian)壓，可能產(chan)生火花損壞電(dian)(dian)(dian)(dian)(dian)路。此時便需要一個穩壓器來保(bao)護電(dian)(dian)(dian)(dian)(dian)路的正常運(yun)行。

穩壓器(qi)由調壓電(dian)路、控(kong)制電(dian)路、及伺服電(dian)機(ji)等組成(cheng)，當輸入電(dian)壓或負(fu)載變化時，控(kong)制電(dian)路進行取樣(yang)、比較、放大，然后驅動(dong)伺服電(dian)機(ji)轉(zhuan)動(dong)，使調壓器(qi)碳(tan)刷的(de)位置改變，通過自動(dong)調整(zheng)線(xian)圈匝數比，從而保(bao)持輸出電(dian)壓的(de)穩定。容量較大的(de)穩壓器(qi)，還采用電(dian)壓補償的(de)原理工作。

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