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(wei)很多(duo)種類。根據工作方式(shi)(shi)(shi),分為(wei)后(hou)備式(shi)(shi)(shi)、在(zai)線(xian)互(hu)動(dong)(dong)(dong)式(shi)(shi)(shi)及在(zai)線(xian)式(shi)(shi)(shi)三大類。在(zai)線(xian)互(hu)動(dong)(dong)(dong)式(shi)(shi)(shi)UPS,又稱(cheng)互(hu)動(dong)(dong)(dong)式(shi)(shi)(shi)UPS,在(zai)市電(dian)(dian)正(zheng)常時(shi)(shi)直接(jie)由市電(dian)(dian)向負(fu)載供(gong)電(dian)(dian),當市電(dian)(dian)偏低(di)或偏高(gao)時(shi)(shi),通過UPS內部(bu)穩壓線(xian)路穩壓后(hou)輸出,當市電(dian)(dian)異(yi)常或停電(dian)(dian)時(shi)(shi),通過轉換(huan)開關轉為(wei)電(dian)(dian)池逆(ni)變(bian)供(gong)電(dian)(dian)。
在(zai)(zai)(zai)(zai)線(xian)(xian)互動式(shi)UPS電源是介于后備式(shi)UPS和在(zai)(zai)(zai)(zai)線(xian)(xian)式(shi)UPS工作方式(shi)之間的UPS設(she)(she)備,它集中了(le)后備式(shi)UPS效率(lv)高和在(zai)(zai)(zai)(zai)線(xian)(xian)式(shi)UPS供電質量(liang)高的優點。在(zai)(zai)(zai)(zai)線(xian)(xian)互動式(shi)UPS電源轉換時間在(zai)(zai)(zai)(zai)0.4毫秒(miao),一般要(yao)求不高的設(she)(she)備可以推(tui)薦使用(yong)在(zai)(zai)(zai)(zai)線(xian)(xian)互動式(shi)UPS。
在(zai)線(xian)互動式(shi)(shi)UPS電(dian)(dian)源在(zai)市(shi)(shi)電(dian)(dian)正常時(shi)直接由市(shi)(shi)電(dian)(dian)向負載供(gong)電(dian)(dian),當市(shi)(shi)電(dian)(dian)偏低(di)(di)或(huo)偏高時(shi),通過UPS內部穩(wen)壓(ya)線(xian)路穩(wen)壓(ya)后輸(shu)出(chu),當市(shi)(shi)電(dian)(dian)異常或(huo)停電(dian)(dian)時(shi),通過轉(zhuan)(zhuan)換(huan)開關轉(zhuan)(zhuan)為電(dian)(dian)池逆(ni)變供(gong)電(dian)(dian)。有較(jiao)寬的(de)輸(shu)入電(dian)(dian)壓(ya)范(fan)圍,噪(zao)音低(di)(di),體(ti)積小等特點,但(dan)同(tong)樣存在(zai)切換(huan)時(shi)間。在(zai)線(xian)互動式(shi)(shi)UPS電(dian)(dian)源結合了后備式(shi)(shi)和(he)在(zai)線(xian)式(shi)(shi)其優點,具(ju)有價格低(di)(di)廉、后期維護成本(ben)低(di)(di)、0ms轉(zhuan)(zhuan)換(huan)等特點,其工作狀態(tai)也可分為市(shi)(shi)電(dian)(dian)正常狀態(tai)與市(shi)(shi)電(dian)(dian)異常狀態(tai)。
在線互動式UPS電源的優缺點
與(yu)后備(bei)式UPS相比,在線互動式UPS的(de)保(bao)護功能(neng)較(jiao)強(qiang),逆變器輸出(chu)電(dian)壓(ya)波形較(jiao)好,一般(ban)為(wei)正(zheng)弦波,而其最大的(de)優點(dian)是具有較(jiao)強(qiang)的(de)軟件(jian)功能(neng),可以方便地(di)上網,進行UPS的(de)遠(yuan)程控制和智能(neng)化管理。可自動偵測外部輸入電(dian)壓(ya)是否處于(yu)正(zheng)常范圍之內,如有偏差(cha)可由穩壓(ya)電(dian)路升壓(ya)或降壓(ya),提供比較(jiao)穩定的(de)正(zheng)弦波輸出(chu)電(dian)壓(ya)。
而且它與計算(suan)機(ji)之間可(ke)以(yi)通(tong)過數據接口(如RS-232串口)進行數據通(tong)訊,通(tong)過監(jian)(jian)控軟件,用戶可(ke)直接從(cong)電腦屏幕(mu)上監(jian)(jian)控電源(yuan)及UPS狀(zhuang)況,簡化、方便管理工作,并(bing)可(ke)提高計算(suan)機(ji)系統(tong)的可(ke)靠性。
這種在線互動(dong)式(shi)UPS集中(zhong)了后備式(shi)UPS效率(lv)高和在線式(shi)UPS供電(dian)質量(liang)高的優點(dian),但(dan)其(qi)穩頻特性能不是十(shi)分理想,不適(shi)合做常(chang)延時的UPS電(dian)源。
在線互動式UPS與在線式UPS電源區別
在(zai)(zai)線式UPS電(dian)源在(zai)(zai)很寬的(de)電(dian)壓范圍(wei)內,兩級(ji)變換(huan),不(bu)管輸入(ru)幅值或者(zhe)(zhe)頻(pin)(pin)率(lv)變化,輸出(chu)都(dou)是穩定的(de)電(dian)壓和頻(pin)(pin)率(lv)。在(zai)(zai)線互(hu)動(dong)式UPS大多數(shu)情況(kuang)下工(gong)作在(zai)(zai)旁路,輸入(ru)電(dian)壓或者(zhe)(zhe)頻(pin)(pin)率(lv)有(you)變化的(de)時候,輸出(chu)和輸入(ru)一樣,和在(zai)(zai)線式UPS電(dian)源相(xiang)比差(cha)遠(yuan)了。