變頻器MDX61B0450-503-4-0T

變頻器MDX61B0450-503-4-0T

中(zhong)海德（福建）工業設(she)備有限公司(si)是一家(jia)綜(zong)合性貿易公司(si)，從事(shi)歐美工(gong)(gong)業自動(dong)化設(she)備及配件(jian)。主(zhu)要經營來自歐洲(zhou)，美國，日本等國電氣、液壓、機械傳動(dong)、儀器(qi)儀表、工(gong)(gong)具(ju)等。主要有(you) SEW，AB，ABB，施耐德，泰(tai)道，西門子，霍尼(ni)韋爾，力士樂，MOOG，SMC等。主營產品有從事(shi)國外的工(gong)控自動化產品進出口貿易(yi)，主要(yao)經營歐美(mei)傳(chuan)感器，編碼(ma)器，泵閥，電機伺服，過濾設備等。

中海德（福建）工業設(she)備(bei)有限公(gong)司  

聯系人：田小華(hua)

電話：0591-86290139微(wei)信同號

手機：18050188551

qq: 2881506989

公(gong)司地址(zhi)：福州市高新區烏龍江大(da)道正(zheng)榮(rong)財(cai)富(fu)中心SOHO3號(hao)樓(lou)8層中海德公司(si)

公司(si)官(guan)網(wang)：

過(guo)壓類故障

變頻(pin)器的(de)過電壓(ya)集中表現(xian)在直流母線的(de)支流電壓(ya)上(shang)。正常情況下(xia)，變頻(pin)器直流電為三相(xiang):全波整流后(hou)的(de)(de)平(ping)均值。若以380V線電(dian)(dian)(dian)壓(ya)(ya)(ya)計算，則平(ping)均直(zhi)流電(dian)(dian)(dian)壓(ya)(ya)(ya)Ud=1.35 U線=513V。 在過(guo)電(dian)(dian)(dian)壓(ya)(ya)(ya)發(fa)生時(shi)，直(zhi)流母(mu)線的(de)(de)儲能電(dian)(dian)(dian)容將(jiang)被(bei)充電(dian)(dian)(dian)，當(dang)電(dian)(dian)(dian)壓(ya)(ya)(ya)上至760V左右時(shi)，變(bian)(bian)頻(pin)器(qi)過(guo)電(dian)(dian)(dian)壓(ya)(ya)(ya)保護動作(zuo)。因此，變(bian)(bian)頻(pin)器(qi)來說，都有一個(ge)正常(chang)(chang)的(de)(de)工作(zuo)電(dian)(dian)(dian)壓(ya)(ya)(ya)范圍(wei),當(dang)電(dian)(dian)(dian)壓(ya)(ya)(ya)超(chao)過(guo)這(zhe)個(ge)范圍(wei)時(shi)很可能損壞(huai)變(bian)(bian)頻(pin)器(qi)，常(chang)(chang)見的(de)(de)過(guo)電(dian)(dian)(dian)壓(ya)(ya)(ya)有兩類(lei)。

1、輸入交流電(dian)源過壓

這種情況是(shi)指輸入電壓超過正常(chang)范圍，一般(ban)發生在節假日負載較輕，電壓升高或降低而線路出現故障(zhang)，此(ci)時(shi)好(hao)斷開電源(yuan)，檢(jian)查、處理。

2、發電(dian)類過電(dian)壓故障

這種情況出現的(de)概率較高，主要是(shi)電(dian)機的(de)同步(bu)轉速比實(shi)際(ji)轉速還高，使電(dian)動機處于(yu)發電(dian)狀態(tai)，而變頻器又(you)沒有安裝制(zhi)動單元，有兩起(qi)(qi)情況可以引起(qi)(qi)這一故(gu)障。

(1)當變(bian)(bian)頻(pin)(pin)器(qi)拖動(dong)大慣性負(fu)載時，其減(jian)速時間設的(de)比(bi)較小，在(zai)減(jian)速過(guo)程中(zhong)，變(bian)(bian)頻(pin)(pin)器(qi)輸(shu)出(chu)(chu)的(de)速度比(bi)較快，而(er)負(fu)載靠本身阻力減(jian)速比(bi)較慢，使負(fu)載拖動(dong)電(dian)(dian)動(dong)機的(de)轉(zhuan)速比(bi)變(bian)(bian)頻(pin)(pin)器(qi)輸(shu)出(chu)(chu)的(de)頻(pin)(pin)率所對應的(de)轉(zhuan)速還要高，電(dian)(dian)動(dong)機處于發電(dian)(dian)狀(zhuang)態，而(er)變(bian)(bian)頻(pin)(pin)器(qi)沒(mei)有能(neng)量(liang)回(hui)饋單(dan)元，因而(er)變(bian)(bian)頻(pin)(pin)器(qi)支流(liu)(liu)(liu)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)回(hui)路電(dian)(dian)壓升(sheng)高，超出(chu)(chu)保護值，出(chu)(chu)現故障，而(er)中(zhong)經常發生(sheng)在(zai)干燥部分，處理這(zhe)(zhe)種故障可(ke)(ke)(ke)以增(zeng)加(jia)再(zai)(zai)生(sheng)制動(dong)單(dan)元，或者修(xiu)改變(bian)(bian)頻(pin)(pin)器(qi)參數,把變(bian)(bian)頻(pin)(pin)器(qi)減(jian)速時間設的(de)長--些。增(zeng)加(jia)再(zai)(zai)生(sheng)制動(dong)單(dan)元功(gong)能(neng)包括能(neng)量(liang)消耗型(xing)，并(bing)聯直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)母(mu)線吸(xi)收(shou)型(xing)、能(neng)量(liang)回(hui)饋型(xing)。能(neng)量(liang)消耗型(xing)在(zai)變(bian)(bian)頻(pin)(pin)器(qi)直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)回(hui)路中(zhong)并(bing)聯一-個制動(dong)電(dian)(dian)阻，通(tong)過(guo)檢測直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)母(mu)線電(dian)(dian)壓來(lai)控(kong)制功(gong)率管的(de)通(tong)斷。并(bing)聯直(zhi)(zhi)(zhi)(zhi)流(liu)(liu)(liu)母(mu)線吸(xi)收(shou)型(xing)使用在(zai)多電(dian)(dian)機傳動(dong)系統，這(zhe)(zhe)種系統往(wang)往(wang)有一.臺(tai)或幾機經常工(gong)作于發電(dian)(dian)狀(zhuang)態，產生(sheng)再(zai)(zai)生(sheng)能(neng)量(liang)，這(zhe)(zhe)些能(neng)量(liang)通(tong)過(guo)并(bing)聯母(mu)線被處于電(dian)(dian)動(dong)狀(zhuang)態的(de)電(dian)(dian)機吸(xi)收(shou)。能(neng)量(liang)回(hui)饋型(xing)的(de)變(bian)(bian)頻(pin)(pin)器(qi)網側變(bian)(bian)流(liu)(liu)(liu)器(qi)是(shi)可(ke)(ke)(ke)逆的(de)，當有再(zai)(zai)生(sheng)能(neng)量(liang)產生(sheng)時可(ke)(ke)(ke)逆變(bian)(bian)流(liu)(liu)(liu)器(qi)就將再(zai)(zai)生(sheng)能(neng)量(liang)回(hui)饋給(gei)電(dian)(dian)網。

(2)多個電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)施動(dong)(dong)(dong)(dong)同一(yi)個負載時(shi)，也可(ke)能出現這一(yi).故(gu)障， 主要由于(yu)(yu)沒有負荷(he)分(fen)配(pei)引起的(de)。以兩(liang)臺電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)拖動(dong)(dong)(dong)(dong)-一(yi)個 負載為例，當一(yi)臺電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)的(de)實(shi)際轉速大于(yu)(yu)另(ling)一(yi)臺電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)的(de)同步轉速時(shi)，則(ze)轉速高的(de)電(dian)(dian)(dian)動(dong)(dong)(dong)(dong)機(ji)相當于(yu)(yu)原動(dong)(dong)(dong)(dong)機(ji)，轉速低的(de)處(chu)于(yu)(yu)發(fa)電(dian)(dian)(dian)狀(zhuang)態，引起故(gu)障。在(zai)紙機(ji)經(jing)常發(fa)生在(zai)榨部(bu)及網(wang)部(bu)，處(chu)理時(shi)需加負荷(he)分(fen)配(pei)控制。可(ke)以把處(chu)于(yu)(yu)紙機(ji)傳動(dong)(dong)(dong)(dong)速度鏈分(fen)支(zhi)的(de)變頻器特性調節軟(ruan)一(yi)些。

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