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(fen)為(wei)(wei)很多種(zhong)類。根據工作方(fang)式,分(fen)為(wei)(wei)后(hou)備(bei)式、在(zai)(zai)線互(hu)(hu)動式及(ji)在(zai)(zai)線式三大類。在(zai)(zai)線互(hu)(hu)動式UPS,又稱互(hu)(hu)動式UPS,在(zai)(zai)市電(dian)(dian)(dian)正常時直接由市電(dian)(dian)(dian)向負載供(gong)(gong)電(dian)(dian)(dian),當市電(dian)(dian)(dian)偏低或偏高(gao)時,通(tong)過(guo)UPS內部(bu)穩壓線路穩壓后(hou)輸出,當市電(dian)(dian)(dian)異常或停電(dian)(dian)(dian)時,通(tong)過(guo)轉換開關轉為(wei)(wei)電(dian)(dian)(dian)池逆變供(gong)(gong)電(dian)(dian)(dian)。
在(zai)(zai)(zai)線(xian)(xian)互動(dong)式(shi)UPS電源是(shi)介(jie)于后備(bei)(bei)式(shi)UPS和在(zai)(zai)(zai)線(xian)(xian)式(shi)UPS工作方式(shi)之間(jian)的UPS設備(bei)(bei),它集中了后備(bei)(bei)式(shi)UPS效率高(gao)(gao)和在(zai)(zai)(zai)線(xian)(xian)式(shi)UPS供電質量高(gao)(gao)的優點。在(zai)(zai)(zai)線(xian)(xian)互動(dong)式(shi)UPS電源轉換時間(jian)在(zai)(zai)(zai)0.4毫秒(miao),一般要求不高(gao)(gao)的設備(bei)(bei)可以推薦使用(yong)在(zai)(zai)(zai)線(xian)(xian)互動(dong)式(shi)UPS。
在(zai)線(xian)互動(dong)式(shi)(shi)UPS電(dian)(dian)源在(zai)市電(dian)(dian)正常(chang)時(shi)直接(jie)由市電(dian)(dian)向負載供(gong)(gong)電(dian)(dian),當市電(dian)(dian)偏低或偏高時(shi),通(tong)過(guo)UPS內部穩壓(ya)線(xian)路穩壓(ya)后輸出,當市電(dian)(dian)異(yi)常(chang)或停電(dian)(dian)時(shi),通(tong)過(guo)轉換(huan)開關轉為電(dian)(dian)池(chi)逆變(bian)供(gong)(gong)電(dian)(dian)。有較寬的輸入電(dian)(dian)壓(ya)范圍,噪音(yin)低,體積小(xiao)等特(te)(te)點,但(dan)同樣存在(zai)切換(huan)時(shi)間。在(zai)線(xian)互動(dong)式(shi)(shi)UPS電(dian)(dian)源結合了后備(bei)式(shi)(shi)和在(zai)線(xian)式(shi)(shi)其優(you)點,具有價格(ge)低廉、后期(qi)維護成(cheng)本低、0ms轉換(huan)等特(te)(te)點,其工作狀(zhuang)態(tai)也可分為市電(dian)(dian)正常(chang)狀(zhuang)態(tai)與市電(dian)(dian)異(yi)常(chang)狀(zhuang)態(tai)。
在線互動式UPS電源的優缺點
與后備式UPS相比,在線互(hu)動(dong)式UPS的(de)(de)保護功(gong)能較(jiao)強(qiang),逆變(bian)器輸(shu)出(chu)電(dian)(dian)壓波形較(jiao)好,一(yi)般為(wei)正(zheng)(zheng)(zheng)弦波,而其最大的(de)(de)優點是具(ju)有(you)較(jiao)強(qiang)的(de)(de)軟件功(gong)能,可以方便(bian)地上(shang)網,進行UPS的(de)(de)遠程(cheng)控制和智(zhi)能化管理。可自動(dong)偵測外部輸(shu)入(ru)電(dian)(dian)壓是否處于正(zheng)(zheng)(zheng)常(chang)范圍之(zhi)內,如有(you)偏差可由穩壓電(dian)(dian)路升(sheng)壓或降壓,提供比較(jiao)穩定的(de)(de)正(zheng)(zheng)(zheng)弦波輸(shu)出(chu)電(dian)(dian)壓。
而且(qie)它(ta)與計算機之(zhi)間可(ke)(ke)(ke)以通過(guo)數(shu)據接(jie)口(kou)(如RS-232串口(kou))進行(xing)數(shu)據通訊(xun),通過(guo)監(jian)控軟件,用戶可(ke)(ke)(ke)直接(jie)從電腦屏幕上監(jian)控電源及UPS狀況,簡(jian)化、方便(bian)管(guan)理工作,并可(ke)(ke)(ke)提高計算機系(xi)統(tong)的可(ke)(ke)(ke)靠性。
這種(zhong)在線(xian)(xian)互動式UPS集(ji)中(zhong)了(le)后備式UPS效率(lv)高(gao)和在線(xian)(xian)式UPS供電質量高(gao)的優點,但其穩(wen)頻特性能(neng)不是十分理想,不適合做常(chang)延(yan)時的UPS電源。
在線互動式UPS與在線式UPS電源區別
在線式(shi)UPS電(dian)源(yuan)在很寬的電(dian)壓(ya)范圍內,兩級變(bian)(bian)換,不管輸入(ru)幅值或者頻率(lv)變(bian)(bian)化(hua),輸出都(dou)是(shi)穩定的電(dian)壓(ya)和(he)頻率(lv)。在線互動式(shi)UPS大多數情況下工作在旁(pang)路(lu),輸入(ru)電(dian)壓(ya)或者頻率(lv)有變(bian)(bian)化(hua)的時候,輸出和(he)輸入(ru)一樣,和(he)在線式(shi)UPS電(dian)源(yuan)相比差遠了。