常見的3類UPS電源

UPS按工作原理分成后(hou)備式(shi)(shi)、在(zai)(zai)線式(shi)(shi)與在(zai)(zai)線互動式(shi)(shi)三大(da)類。

1、后備式UPS

在市(shi)電(dian)(dian)正常時(shi)直接由市(shi)電(dian)(dian)向(xiang)負載供電(dian)(dian)，當市(shi)電(dian)(dian)超(chao)出(chu)其(qi)工作范圍或停(ting)電(dian)(dian)時(shi)，通(tong)過轉(zhuan)換(huan)(huan)開(kai)關(guan)轉(zhuan)為電(dian)(dian)池逆變(bian)供電(dian)(dian)。其(qi)特點是：結構簡(jian)單，體積小，成本低，但輸(shu)入電(dian)(dian)壓范圍窄，輸(shu)出(chu)電(dian)(dian)壓穩定精度差，有(you)切(qie)換(huan)(huan)時(shi)間(jian)，且輸(shu)出(chu)波形一般為方波。

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2、在線互動式UPS

在市電正常(chang)時直接由市電向負載供電，當(dang)市電偏(pian)低(di)或偏(pian)高時，通過UPS內部穩壓(ya)線路穩壓(ya)后輸出，當市(shi)電(dian)異常(chang)或停電(dian)時(shi)，通過轉(zhuan)(zhuan)換(huan)開(kai)關(guan)轉(zhuan)(zhuan)為電(dian)池逆變供(gong)電(dian)。其(qi)特點是：有較(jiao)寬的輸入(ru)電(dian)壓(ya)范圍，噪(zao)音低，體積小等(deng)特點，但同樣存(cun)在切(qie)換(huan)時(shi)間。

3、在線式UPS

在(zai)市電(dian)(dian)正常時(shi)，由市電(dian)(dian)進(jin)行整流提(ti)供(gong)直流電(dian)(dian)壓(ya)給逆(ni)變(bian)器工作(zuo)，由逆(ni)變(bian)器向負(fu)載(zai)提(ti)供(gong)交流電(dian)(dian)，在(zai)市電(dian)(dian)異(yi)常時(shi)，逆(ni)變(bian)器由電(dian)(dian)池提(ti)供(gong)能(neng)量，逆(ni)變(bian)器始終處于工作(zuo)狀態(tai)，保證無(wu)間斷(duan)輸(shu)(shu)(shu)出(chu)。其(qi)特點是，有極(ji)寬的(de)輸(shu)(shu)(shu)入電(dian)(dian)壓(ya)范圍(wei)，無(wu)切換時(shi)間且(qie)輸(shu)(shu)(shu)出(chu)電(dian)(dian)壓(ya)穩定精度高，特別適(shi)合對電(dian)(dian)源要(yao)求較(jiao)高的(de)場合，但是成本(ben)較(jiao)高。目(mu)前(qian)，功率大(da)于3KVA的(de)UPS幾(ji)乎都是在線式UPS。