在線互動式UPS電源的工作原理
UPS是一種即使在市電停電的情況下,也能為用電設備提供持續的穩壓穩頻的交流電輸出的電源裝置。UPS通常帶有儲能裝置,根據工作方式,輸出容量,相數等的不同,UPS電源可以分為很多(duo)種類(lei)。根據工(gong)作(zuo)方式(shi)(shi),分為后備式(shi)(shi)、在(zai)線(xian)(xian)互(hu)動式(shi)(shi)及(ji)在(zai)線(xian)(xian)式(shi)(shi)三大(da)類(lei)。在(zai)線(xian)(xian)互(hu)動式(shi)(shi)UPS,又稱互(hu)動式(shi)(shi)UPS,在(zai)市(shi)電正常時(shi)直接(jie)由市(shi)電向負(fu)載供(gong)電,當市(shi)電偏(pian)低或(huo)偏(pian)高時(shi),通(tong)過(guo)UPS內部穩壓(ya)線(xian)(xian)路(lu)穩壓(ya)后輸(shu)出,當市(shi)電異常或(huo)停電時(shi),通(tong)過(guo)轉(zhuan)換開(kai)關轉(zhuan)為電池(chi)逆變(bian)供(gong)電。
在(zai)線互動式(shi)UPS電源是(shi)介于(yu)后(hou)備(bei)(bei)式(shi)UPS和在(zai)線式(shi)UPS工作方式(shi)之間的(de)UPS設備(bei)(bei),它集中了后(hou)備(bei)(bei)式(shi)UPS效(xiao)率高(gao)和在(zai)線式(shi)UPS供(gong)電質量高(gao)的(de)優點。在(zai)線互動式(shi)UPS電源轉換時間在(zai)0.4毫秒,一(yi)般要求(qiu)不高(gao)的(de)設備(bei)(bei)可(ke)以推薦使用在(zai)線互動式(shi)UPS。
在線(xian)互(hu)動式(shi)(shi)UPS電(dian)(dian)(dian)(dian)(dian)源在市電(dian)(dian)(dian)(dian)(dian)正常時直接由市電(dian)(dian)(dian)(dian)(dian)向(xiang)負載(zai)供(gong)電(dian)(dian)(dian)(dian)(dian),當(dang)市電(dian)(dian)(dian)(dian)(dian)偏(pian)低(di)或偏(pian)高時,通過UPS內(nei)部穩(wen)壓線(xian)路穩(wen)壓后輸出,當(dang)市電(dian)(dian)(dian)(dian)(dian)異常或停電(dian)(dian)(dian)(dian)(dian)時,通過轉換開(kai)關轉為電(dian)(dian)(dian)(dian)(dian)池逆變供(gong)電(dian)(dian)(dian)(dian)(dian)。有較寬(kuan)的輸入電(dian)(dian)(dian)(dian)(dian)壓范圍,噪音低(di),體積(ji)小等(deng)特點(dian),但(dan)同樣存(cun)在切換時間。在線(xian)互(hu)動式(shi)(shi)UPS電(dian)(dian)(dian)(dian)(dian)源結(jie)合了后備式(shi)(shi)和(he)在線(xian)式(shi)(shi)其優點(dian),具有價格低(di)廉、后期維(wei)護成本低(di)、0ms轉換等(deng)特點(dian),其工作狀(zhuang)態(tai)(tai)也可分為市電(dian)(dian)(dian)(dian)(dian)正常狀(zhuang)態(tai)(tai)與(yu)市電(dian)(dian)(dian)(dian)(dian)異常狀(zhuang)態(tai)(tai)。
在線互動式UPS電源的優缺點
與后備式UPS相(xiang)比(bi),在線互(hu)動式UPS的保(bao)護(hu)功能(neng)較(jiao)強,逆(ni)變器輸(shu)出電壓波(bo)形較(jiao)好,一般為正(zheng)(zheng)弦波(bo),而其最大的優點是(shi)具(ju)有較(jiao)強的軟件功能(neng),可(ke)以方便地(di)上網,進(jin)行UPS的遠程控制和智能(neng)化管(guan)理。可(ke)自動偵測外部(bu)輸(shu)入電壓是(shi)否(fou)處于正(zheng)(zheng)常范圍之內,如(ru)有偏差可(ke)由穩壓電路升壓或(huo)降壓,提供比(bi)較(jiao)穩定的正(zheng)(zheng)弦波(bo)輸(shu)出電壓。
而(er)且它與計(ji)算機之間可(ke)以通過數據(ju)接口(kou)(如RS-232串口(kou))進行數據(ju)通訊,通過監控軟件,用戶可(ke)直接從電(dian)腦(nao)屏幕(mu)上監控電(dian)源及UPS狀(zhuang)況,簡化、方便管理(li)工(gong)作,并(bing)可(ke)提(ti)高(gao)計(ji)算機系統(tong)的可(ke)靠性(xing)。
這(zhe)種在線(xian)互動(dong)式UPS集(ji)中了后備式UPS效率高和在線(xian)式UPS供電質(zhi)量高的優(you)點(dian),但其穩頻特性能不是(shi)十分理(li)想,不適合做常延時的UPS電源。
在線互動式UPS與在線式UPS電源區別
在(zai)(zai)線(xian)式UPS電源(yuan)在(zai)(zai)很寬的(de)電壓范圍內(nei),兩級變換,不(bu)管輸(shu)(shu)入幅(fu)值或者(zhe)頻(pin)率(lv)變化(hua),輸(shu)(shu)出(chu)都是穩定的(de)電壓和(he)(he)頻(pin)率(lv)。在(zai)(zai)線(xian)互動式UPS大(da)多數情況(kuang)下工作在(zai)(zai)旁路,輸(shu)(shu)入電壓或者(zhe)頻(pin)率(lv)有變化(hua)的(de)時候,輸(shu)(shu)出(chu)和(he)(he)輸(shu)(shu)入一(yi)樣,和(he)(he)在(zai)(zai)線(xian)式UPS電源(yuan)相比差遠了。