變頻(pin)器(qi)MDX61B0450-503-4-0T

變頻器MDX61B0450-503-4-0T

中海德（福建）工業設備(bei)有限(xian)公司(si)(si)是一家綜合性(xing)貿易公司(si)(si)，從事(shi)歐美(mei)工(gong)業自動化設備及配件。主(zhu)要(yao)經(jing)營(ying)來自歐洲(zhou)，美(mei)國，日本等(deng)國電氣(qi)、液壓、機械傳動、儀器儀表、工(gong)具等(deng)。主要(yao)有 SEW，AB，ABB，施耐德，泰道，西(xi)門子，霍尼韋爾，力(li)士(shi)樂，MOOG，SMC等。主營產品(pin)(pin)有從事(shi)國(guo)外(wai)的(de)工控自動化產品(pin)(pin)進出口貿易，主要經營歐美傳感器(qi)，編碼(ma)器(qi)，泵閥，電機伺服(fu)，過濾設備(bei)等。

中海德(de)（福建）工(gong)業設備有(you)限公司  

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過(guo)壓類故障

變頻(pin)(pin)器(qi)的過電壓集中表現(xian)在(zai)直流母線的支流電壓上。正常情(qing)況下，變頻(pin)(pin)器(qi)直流電為(wei)三(san)相:全(quan)波整(zheng)流后的(de)平(ping)均值。若以380V線(xian)電(dian)(dian)(dian)壓(ya)計(ji)算，則平(ping)均直(zhi)流電(dian)(dian)(dian)壓(ya)Ud=1.35 U線(xian)=513V。 在(zai)過(guo)(guo)電(dian)(dian)(dian)壓(ya)發(fa)生(sheng)時(shi)，直(zhi)流母線(xian)的(de)儲能電(dian)(dian)(dian)容(rong)將(jiang)被充電(dian)(dian)(dian)，當電(dian)(dian)(dian)壓(ya)上至760V左右時(shi)，變頻(pin)器(qi)過(guo)(guo)電(dian)(dian)(dian)壓(ya)保(bao)護(hu)動作(zuo)。因此，變頻(pin)器(qi)來說(shuo)，都有(you)一個正(zheng)常(chang)(chang)的(de)工作(zuo)電(dian)(dian)(dian)壓(ya)范圍,當電(dian)(dian)(dian)壓(ya)超過(guo)(guo)這個范圍時(shi)很可能損壞變頻(pin)器(qi)，常(chang)(chang)見的(de)過(guo)(guo)電(dian)(dian)(dian)壓(ya)有(you)兩類。

1、輸(shu)入(ru)交流電源過壓

這種情況(kuang)是指輸入(ru)電(dian)(dian)壓(ya)超過正常范圍，一般發生在節(jie)假日負(fu)載較輕，電(dian)(dian)壓(ya)升(sheng)高或(huo)降低而線(xian)路出(chu)現(xian)故障(zhang)，此時好斷開電(dian)(dian)源，檢(jian)查、處理(li)。

2、發電(dian)類(lei)過電(dian)壓故障

這種情況出現的概率較高(gao)，主(zhu)要(yao)是電機(ji)的同步轉速(su)比實際轉速(su)還高(gao)，使電動(dong)機(ji)處(chu)于發電狀態，而變頻器又沒(mei)有安裝制動(dong)單元，有兩(liang)起(qi)情況可以引起(qi)這一(yi)故障。

(1)當變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)拖動(dong)(dong)大慣性(xing)負(fu)(fu)載(zai)時(shi)，其減(jian)速(su)(su)(su)時(shi)間設的(de)比(bi)(bi)較(jiao)(jiao)小，在(zai)(zai)減(jian)速(su)(su)(su)過(guo)程中(zhong)，變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)輸出(chu)的(de)速(su)(su)(su)度(du)比(bi)(bi)較(jiao)(jiao)快(kuai)，而(er)負(fu)(fu)載(zai)靠(kao)本身阻(zu)力(li)減(jian)速(su)(su)(su)比(bi)(bi)較(jiao)(jiao)慢，使負(fu)(fu)載(zai)拖動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)的(de)轉(zhuan)速(su)(su)(su)比(bi)(bi)變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)輸出(chu)的(de)頻(pin)(pin)率(lv)所(suo)對應的(de)轉(zhuan)速(su)(su)(su)還要高，電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)處(chu)于發電(dian)(dian)(dian)(dian)(dian)(dian)狀態(tai)，而(er)變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)沒有(you)能(neng)(neng)(neng)(neng)量(liang)回(hui)(hui)饋(kui)單(dan)元，因而(er)變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)支流(liu)(liu)(liu)直(zhi)流(liu)(liu)(liu)回(hui)(hui)路(lu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升(sheng)高，超出(chu)保護值，出(chu)現故障(zhang)，而(er)中(zhong)經(jing)常發生(sheng)在(zai)(zai)干燥部分，處(chu)理這種故障(zhang)可(ke)以增(zeng)加(jia)再(zai)生(sheng)制動(dong)(dong)單(dan)元，或者修(xiu)改變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)參數,把變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)減(jian)速(su)(su)(su)時(shi)間設的(de)長--些。增(zeng)加(jia)再(zai)生(sheng)制動(dong)(dong)單(dan)元功能(neng)(neng)(neng)(neng)包括能(neng)(neng)(neng)(neng)量(liang)消耗型，并(bing)(bing)聯直(zhi)流(liu)(liu)(liu)母線(xian)(xian)吸(xi)收型、能(neng)(neng)(neng)(neng)量(liang)回(hui)(hui)饋(kui)型。能(neng)(neng)(neng)(neng)量(liang)消耗型在(zai)(zai)變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)直(zhi)流(liu)(liu)(liu)回(hui)(hui)路(lu)中(zhong)并(bing)(bing)聯一(yi)-個制動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，通過(guo)檢測直(zhi)流(liu)(liu)(liu)母線(xian)(xian)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)來控(kong)制功率(lv)管(guan)的(de)通斷(duan)。并(bing)(bing)聯直(zhi)流(liu)(liu)(liu)母線(xian)(xian)吸(xi)收型使用(yong)在(zai)(zai)多電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)傳動(dong)(dong)系統，這種系統往往有(you)一(yi).臺或幾機(ji)經(jing)常工作于發電(dian)(dian)(dian)(dian)(dian)(dian)狀態(tai)，產(chan)生(sheng)再(zai)生(sheng)能(neng)(neng)(neng)(neng)量(liang)，這些能(neng)(neng)(neng)(neng)量(liang)通過(guo)并(bing)(bing)聯母線(xian)(xian)被處(chu)于電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)狀態(tai)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)吸(xi)收。能(neng)(neng)(neng)(neng)量(liang)回(hui)(hui)饋(kui)型的(de)變(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)網(wang)側(ce)變(bian)(bian)(bian)流(liu)(liu)(liu)器(qi)(qi)是可(ke)逆的(de)，當有(you)再(zai)生(sheng)能(neng)(neng)(neng)(neng)量(liang)產(chan)生(sheng)時(shi)可(ke)逆變(bian)(bian)(bian)流(liu)(liu)(liu)器(qi)(qi)就將再(zai)生(sheng)能(neng)(neng)(neng)(neng)量(liang)回(hui)(hui)饋(kui)給電(dian)(dian)(dian)(dian)(dian)(dian)網(wang)。

(2)多(duo)個(ge)電(dian)(dian)(dian)(dian)動(dong)施動(dong)同一(yi)(yi)(yi)個(ge)負(fu)(fu)載(zai)時(shi)，也可能(neng)出現這一(yi)(yi)(yi).故(gu)障， 主要由于(yu)(yu)沒有負(fu)(fu)荷分(fen)配(pei)引(yin)起(qi)的(de)。以兩臺電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)拖(tuo)動(dong)-一(yi)(yi)(yi)個(ge) 負(fu)(fu)載(zai)為例，當(dang)一(yi)(yi)(yi)臺電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)實際轉速大(da)于(yu)(yu)另一(yi)(yi)(yi)臺電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)同步轉速時(shi)，則轉速高的(de)電(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)相當(dang)于(yu)(yu)原動(dong)機(ji)(ji)，轉速低的(de)處于(yu)(yu)發(fa)電(dian)(dian)(dian)(dian)狀(zhuang)態(tai)，引(yin)起(qi)故(gu)障。在紙(zhi)(zhi)機(ji)(ji)經常(chang)發(fa)生(sheng)在榨部及網部，處理時(shi)需加負(fu)(fu)荷分(fen)配(pei)控制。可以把處于(yu)(yu)紙(zhi)(zhi)機(ji)(ji)傳動(dong)速度鏈分(fen)支的(de)變頻器特性(xing)調節(jie)軟一(yi)(yi)(yi)些(xie)。

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