穩壓器的作用

穩(wen)壓(ya)器(qi)是使輸出(chu)電(dian)(dian)(dian)壓(ya)穩(wen)定(ding)的(de)設備。穩(wen)壓(ya)器(qi)調(diao)壓(ya)電(dian)(dian)(dian)路、控制電(dian)(dian)(dian)路、及伺服電(dian)(dian)(dian)機(ji)(ji)等組成。當輸入電(dian)(dian)(dian)壓(ya)或負載(zai)變化(hua)時，控制電(dian)(dian)(dian)路進行取樣、比較、放(fang)大，然后驅動(dong)伺服電(dian)(dian)(dian)機(ji)(ji)轉動(dong)，使調(diao)壓(ya)器(qi)碳(tan)刷(shua)的(de)位置改變，通(tong)過自動(dong)調(diao)整線圈匝數比，從而保持輸出(chu)電(dian)(dian)(dian)壓(ya)的(de)穩(wen)定(ding)。家用穩(wen)壓(ya)器(qi)的(de)作用：

1.能把(ba)低壓125V－165V或高壓250V－270V的電壓穩定在(zai)200－230V之間，使家用(yong)電器能正常工作(zuo)；

2.當輸入(ru)電壓高于(yu)255-275V或低于(yu)125-160V時，能自動切(qie)斷電源；

3.在斷(duan)電(dian)之后又突然來電(dian)時，可(ke)以延時5－8分鐘啟動輸出電(dian)源，避免(mian)因為(wei)電(dian)壓過高(gao)使電(dian)器受到(dao)損傷。在選購(gou)家用穩壓器時一定要注(zhu)意上(shang)述三種基本功能的(de)完備(bei)與否。

穩壓器工作原理

由于部分(fen)電(dian)(dian)(dian)器(qi)中含有線圈組件(jian)，在通電(dian)(dian)(dian)初期(qi)會(hui)(hui)產(chan)生(sheng)阻礙電(dian)(dian)(dian)流的(de)(de)渦流，渦流的(de)(de)產(chan)生(sheng)既會(hui)(hui)削弱到(dao)電(dian)(dian)(dian)器(qi)啟(qi)動時(shi)(shi)的(de)(de)瞬(shun)(shun)時(shi)(shi)電(dian)(dian)(dian)壓，導致(zhi)啟(qi)動緩慢，又會(hui)(hui)加強(qiang)斷路后產(chan)生(sheng)的(de)(de)瞬(shun)(shun)時(shi)(shi)電(dian)(dian)(dian)壓，可能產(chan)生(sheng)火(huo)花損壞電(dian)(dian)(dian)路。此時(shi)(shi)便需要一個穩壓器(qi)來保護電(dian)(dian)(dian)路的(de)(de)正(zheng)常運行(xing)。

穩壓(ya)器(qi)由調(diao)壓(ya)電(dian)(dian)路、控(kong)制電(dian)(dian)路、及伺服電(dian)(dian)機等(deng)組(zu)成，當輸入電(dian)(dian)壓(ya)或負(fu)載變(bian)化時，控(kong)制電(dian)(dian)路進行取樣、比較、放大，然后驅(qu)動(dong)伺服電(dian)(dian)機轉(zhuan)動(dong)，使調(diao)壓(ya)器(qi)碳刷的(de)(de)位置改(gai)變(bian)，通過自動(dong)調(diao)整線圈匝數比，從(cong)而(er)保持輸出電(dian)(dian)壓(ya)的(de)(de)穩定。容量(liang)較大的(de)(de)穩壓(ya)器(qi)，還(huan)采用電(dian)(dian)壓(ya)補償的(de)(de)原(yuan)理工作。

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