一、濾波電抗器工作原理是什么
濾波電抗器的工(gong)作原理可以(yi)分為兩部(bu)分,當(dang)諧波(bo)比較小時的時候,可以(yi)通(tong)過濾波(bo)電抗器進行抑制,但是當(dang)諧波(bo)比較大(da)的情況(kuang)下(xia),可以(yi)選擇采取串聯形式放大(da)諧波(bo)電流,從而達到(dao)保護電機設(she)施的目的,將電容器的損壞程度降到(dao)最低。
二、濾波電抗器有什么作用
濾波電(dian)(dian)(dian)抗器是用(yong)來(lai)限制電(dian)(dian)(dian)網電(dian)(dian)(dian)壓突(tu)變和操作過電(dian)(dian)(dian)壓引起的電(dian)(dian)(dian)流沖擊,平(ping)滑(hua)電(dian)(dian)(dian)源電(dian)(dian)(dian)壓中包含的尖峰脈沖,或平(ping)滑(hua)橋式整流電(dian)(dian)(dian)路換(huan)相(xiang)時產(chan)生的電(dian)(dian)(dian)壓缺陷,有(you)效地保護變頻器和改善功(gong)率(lv)因數,它既能阻止來(lai)自電(dian)(dian)(dian)網的干擾,又能減少整流單元產(chan)生的諧波電(dian)(dian)(dian)流對(dui)電(dian)(dian)(dian)網的污染(ran)。
1、輸出電抗器的作用:
輸出電(dian)(dian)抗(kang)(kang)器(qi)主要(yao)作用是補償(chang)長線(50-200m)分(fen)布電(dian)(dian)容(rong)的(de)影響,并能抑(yi)制輸出諧波電(dian)(dian)流,提高(gao)輸出高(gao)頻(pin)阻抗(kang)(kang),有效抑(yi)制dv/dt.減低高(gao)頻(pin)漏電(dian)(dian)流,起到保護變頻(pin)器(qi),減小設備噪聲的(de)作用。電(dian)(dian)容(rong)器(qi)在補償(chang)功率的(de)時候,往往會受到諧波電(dian)(dian)壓(ya)和(he)諧波電(dian)(dian)流的(de)沖擊,造(zao)成電(dian)(dian)容(rong)器(qi)損壞和(he)功率因數降低,為(wei)此,需要(yao)在補償(chang)的(de)時候進行諧波治理。
2、直流電抗器的作用:
直流(liu)(liu)(liu)(liu)電(dian)抗(kang)器接在(zai)(zai)變(bian)(bian)頻(pin)系統的直流(liu)(liu)(liu)(liu)整流(liu)(liu)(liu)(liu)環節與逆變(bian)(bian)環節之間,主(zhu)要(yao)用途(tu)是將疊加在(zai)(zai)直流(liu)(liu)(liu)(liu)電(dian)流(liu)(liu)(liu)(liu)上的交流(liu)(liu)(liu)(liu)分量限定(ding)(ding)在(zai)(zai)某一規定(ding)(ding)值(zhi),保(bao)持(chi)整流(liu)(liu)(liu)(liu)電(dian)流(liu)(liu)(liu)(liu)連續,減小電(dian)流(liu)(liu)(liu)(liu)脈沖(chong)值(zhi),使逆變(bian)(bian)環節運行更(geng)穩定(ding)(ding)及改(gai)善變(bian)(bian)頻(pin)器的功率因數。