常見的3類UPS電源

UPS按工作原理(li)分(fen)成后備式(shi)(shi)、在線式(shi)(shi)與在線互(hu)動(dong)式(shi)(shi)三(san)大類(lei)。

1、后備式UPS

在(zai)市(shi)(shi)電(dian)(dian)(dian)正常時直接(jie)由市(shi)(shi)電(dian)(dian)(dian)向負(fu)載供電(dian)(dian)(dian)，當市(shi)(shi)電(dian)(dian)(dian)超出(chu)其(qi)工作(zuo)范圍或停電(dian)(dian)(dian)時，通過(guo)轉換(huan)開關轉為電(dian)(dian)(dian)池逆變供電(dian)(dian)(dian)。其(qi)特點是：結構簡單，體積小(xiao)，成(cheng)本低，但輸(shu)入電(dian)(dian)(dian)壓(ya)(ya)范圍窄(zhai)，輸(shu)出(chu)電(dian)(dian)(dian)壓(ya)(ya)穩定精度差(cha)，有切換(huan)時間，且(qie)輸(shu)出(chu)波(bo)形一般為方波(bo)。

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2、在線互動式UPS

在(zai)市(shi)電(dian)(dian)正常(chang)時直接由市(shi)電(dian)(dian)向負(fu)載(zai)供(gong)電(dian)(dian)，當市(shi)電(dian)(dian)偏低或偏高時，通過UPS內部穩(wen)壓(ya)(ya)線路穩(wen)壓(ya)(ya)后輸(shu)出(chu)，當市電異常(chang)或停電時，通過轉換(huan)(huan)開關轉為電池逆變供電。其(qi)特點是(shi)：有較寬的(de)輸(shu)入電壓(ya)(ya)范圍，噪音低，體(ti)積小等(deng)特點，但同樣存在(zai)切換(huan)(huan)時間。

3、在線式UPS

在市(shi)電(dian)(dian)(dian)(dian)正常時，由市(shi)電(dian)(dian)(dian)(dian)進行整(zheng)流提供直流電(dian)(dian)(dian)(dian)壓(ya)給逆(ni)變器工作(zuo)，由逆(ni)變器向負載提供交流電(dian)(dian)(dian)(dian)，在市(shi)電(dian)(dian)(dian)(dian)異常時，逆(ni)變器由電(dian)(dian)(dian)(dian)池提供能量(liang)，逆(ni)變器始終(zhong)處(chu)于工作(zuo)狀態，保證無間斷輸出。其(qi)特點是，有極(ji)寬的輸入電(dian)(dian)(dian)(dian)壓(ya)范圍(wei)，無切換時間且輸出電(dian)(dian)(dian)(dian)壓(ya)穩定(ding)精度高(gao)(gao)，特別適合(he)對電(dian)(dian)(dian)(dian)源要求較高(gao)(gao)的場(chang)合(he)，但是成(cheng)本較高(gao)(gao)。目前，功率大于3KVA的UPS幾乎都是在線(xian)式UPS。