西門子變頻器6SE6430-2UD33-0DB0        西門子變頻器6SE6430-2UD33-0DB0

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用細的(de)木(mu)棍或其他較軟的(de)物體撥動(dong)風(feng)葉，手感應該流(liu)暢(chang)，風(feng)機轉動(dong)應靈活，不(bu)能有卡澀的(de)現象，觀察風(feng)機是否有液體滲出或潤滑油的(de)痕(hen)跡。

3.電氣性能檢查

長期存放的變頻器(qi)，由于環境的影(ying)響(xiang)和變頻器(qi)器(qi)件的使(shi)用期限，必須定期對變頻器(qi)進行電氣性(xing)能(neng)的檢(jian)查及保(bao)養。具體(ti)方法(fa)如(ru)下(xia):

使(shi)用(yong)萬用(yong)表(biao)(biao)檢測(ce)整流部分的整流橋特性，使(shi)用(yong)萬用(yong)表(biao)(biao)的歐姆(mu)擋X100，紅表(biao)(biao)筆接(jie)變頻(pin)器的“P”端，用(yong)黑(hei)表(biao)(biao)筆分別接(jie)輸人“R”“S”“T”，表(biao)(biao)針(zhen)(zhen)擺(bai)(bai)動應在2/3處(chu)(chu)，超(chao)過2/3或(huo)低于l/2均視異常，將黑(hei)紅表(biao)(biao)筆交換(huan)重(zhong)新(xin)測(ce)量，表(biao)(biao)針(zhen)(zhen)不能(neng)擺(bai)(bai)動，如出現擺(bai)(bai)動則為異常。使(shi)用(yong)萬用(yong)表(biao)(biao)的歐姆(mu)擋X100，紅表(biao)(biao)筆接(jie)變頻(pin)器的“N”端，用(yong)黑(hei)表(biao)(biao)筆分別接(jie)輸入“R”“S”“T”，表(biao)(biao)針(zhen)(zhen)擺(bai)(bai)動應在2/3處(chu)(chu)，超(chao)過2/3或(huo)低于1/2均視異常，將黑(hei)紅表(biao)(biao)筆交換(huan)重(zhong)新(xin)測(ce)量，表(biao)(biao)針(zhen)(zhen)不能(neng)擺(bai)(bai)動，否則為異常。

用同(tong)樣的(de)方法檢(jian)查(cha)逆變(bian)部(bu)分(fen)，將“R”“S”“T”換為(wei)“U”“V”“W”，因為(wei)逆變(bian)的(de)IGBT的(de)源極(ji)和漏極(ji)之間在關閉狀態(tai)下同(tong)樣有整流(liu)橋特(te)性。

絕緣(yuan)測試。對于輸人輸出端(duan)和(he)地(外殼)進行高壓絕緣(yuan)檢測，使用500v搖表的黑(hei)表端(duan)接變(bian)頻器的接地標(biao)識。紅端(duan)分別接“R”“S”“T”“U”“V”“W”，均速搖動搖表，測量絕緣(yuan)電(dian)阻應在SM以(yi)上。

電(dian)(dian)(dian)容(rong)器(qi)的(de)(de)檢測。主(zhu)回路主(zhu)要由(you)三相或(huo)單相整(zheng)流(liu)橋、平滑(hua)電(dian)(dian)(dian)容(rong)、濾波電(dian)(dian)(dian)容(rong)、IPM逆變橋、限流(liu)電(dian)(dian)(dian)阻(zu)、接觸器(qi)等元器(qi)件(jian)組成。其中對(dui)變頻器(qi)壽(shou)命有影響(xiang)的(de)(de)是平滑(hua)鋁電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)器(qi)，它的(de)(de)壽(shou)命主(zhu)要由(you)加在(zai)其兩端的(de)(de)直流(liu)電(dian)(dian)(dian)壓和內部(bu)溫度(du)所決(jue)定。在(zai)主(zhu)回路設(she)計時已經根據電(dian)(dian)(dian)源電(dian)(dian)(dian)壓選定了(le)電(dian)(dian)(dian)容(rong)器(qi)的(de)(de)型號，所以(yi)內部(bu)的(de)(de)溫度(du)對(dui)電(dian)(dian)(dian)解電(dian)(dian)(dian)容(rong)器(qi)[優論論文]的(de)(de)壽(shou)命起決(jue)定作用。

電解(jie)電容器相對溫度的劣化特(te)性直(zhi)接影(ying)響到(dao)變頻器的壽命。

一(yi)般每(mei)上升(sheng)10℃變頻器(qi)的(de)(de)壽命減(jian)半，這是因(yin)為電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)內部的(de)(de)化(hua)學反應(ying)隨著溫(wen)(wen)度(du)(du)(du)(du)的(de)(de)升(sheng)高導致劣化(hua)速(su)度(du)(du)(du)(du)加快。劣化(hua)速(su)度(du)(du)(du)(du)與(yu)材(cai)料溫(wen)(wen)度(du)(du)(du)(du)的(de)(de)關(guan)系遵循(xun)阿列(lie)里烏斯(si)理(li)論(lun)(電(dian)(dian)(dian)(dian)解(jie)液理(li)論(lun))。電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)的(de)(de)內部溫(wen)(wen)度(du)(du)(du)(du)實際上是電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)周(zhou)圍環境溫(wen)(wen)度(du)(du)(du)(du)與(yu)脈動(dong)電(dian)(dian)(dian)(dian)流造成(cheng)的(de)(de)溫(wen)(wen)度(du)(du)(du)(du)之和(he)。因(yin)此(ci)，我們應(ying)該在安(an)裝(zhuang)時(shi)考慮適合的(de)(de)環境溫(wen)(wen)度(du)(du)(du)(du)，在電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)劣化(hua)過程(cheng)中，會出現(xian)靜電(dian)(dian)(dian)(dian)容(rong)(rong)量減(jian)小，漏電(dian)(dian)(dian)(dian)流增大(da)，等價電(dian)(dian)(dian)(dian)阻值增大(da)，tgδ值增大(da)等現(xian)象(xiang)。維(wei)(wei)護(hu)保養時(shi)通常(chang)以比較容(rong)(rong)易(yi)測量的(de)(de)靜電(dian)(dian)(dian)(dian)容(rong)(rong)量來判斷電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)的(de)(de)劣化(hua)情況，當(dang)靜電(dian)(dian)(dian)(dian)容(rong)(rong)量低于初期值的(de)(de)80%，絕緣阻抗在5MΩ以下(xia)時(shi)應(ying)考慮更換電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)。對于儲(chu)存(cun)不超過5年(nian)(nian)的(de)(de)電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)我們應(ying)該定期充(chong)(chong)電(dian)(dian)(dian)(dian)以進行維(wei)(wei)護(hu)，每(mei)隔半年(nian)(nian)到一(yi)年(nian)(nian)充(chong)(chong)電(dian)(dian)(dian)(dian)一(yi)次，方法具(ju)體(ti)如下(xia):

首(shou)先準備功(gong)率不(bu)小(xiao)于5KW的(de)三相(xiang)調(diao)壓(ya)(ya)器將調(diao)壓(ya)(ya)器的(de)輸人端接人有(you)(you)短路過(guo)(guo)流(liu)保護(hu)的(de)三相(xiang)電(dian)(dian)(dian)源(yuan)，三相(xiang)電(dian)(dian)(dian)源(yuan)每相(xiang)必須(xu)有(you)(you)10A的(de)交(jiao)流(liu)電(dian)(dian)(dian)流(liu)表作(zuo)為指示。將輸出端通過(guo)(guo)快(kuai)熔接入變(bian)頻器的(de)“R”“S”“T”。將變(bian)頻器調(diao)至(zhi)10伏(fu)以下，送電(dian)(dian)(dian)，觀(guan)察電(dian)(dian)(dian)流(liu)表是(shi)否(fou)異常(chang)，如無(wu)(wu)異常(chang)，將電(dian)(dian)(dian)壓(ya)(ya)緩(huan)緩(huan)調(diao)到(dao)30伏(fu)，觀(guan)察5分鐘，如無(wu)(wu)異常(chang)，每十分鐘將電(dian)(dian)(dian)壓(ya)(ya)升(sheng)高20伏(fu)，加壓(ya)(ya)過(guo)(guo)程中，隨(sui)時(shi)(shi)觀(guan)察電(dian)(dian)(dian)流(liu)的(de)變(bian)化，當電(dian)(dian)(dian)壓(ya)(ya)超(chao)過(guo)(guo)200伏(fu)時(shi)(shi)，振風機等開始(shi)工作(zuo)。這時(shi)(shi)可(ke)將電(dian)(dian)(dian)壓(ya)(ya)緩(huan)緩(huan)升(sheng)到(dao)350伏(fu)，觀(guan)察有(you)(you)無(wu)(wu)電(dian)(dian)(dian)流(liu)波動，維持1小(xiao)時(shi)(shi)后，將電(dian)(dian)(dian)壓(ya)(ya)升(sheng)到(dao)額定電(dian)(dian)(dian)壓(ya)(ya)，再維持2小(xiao)時(shi)(shi)，繼續觀(guan)察電(dian)(dian)(dian)流(liu)。無(wu)(wu)異常(chang)即可(ke)。上電(dian)(dian)(dian)過(guo)(guo)程中，如果遇見變(bian)頻器的(de)面(mian)板顯示有(you)(you)故障代碼，先查明原因，是(shi)否(fou)與低壓(ya)(ya)有(you)(you)關，否(fou)則應引起重視(shi)。電(dian)(dian)(dian)源(yuan)斷開后應等到(dao)充電(dian)(dian)(dian)燈*熄滅方(fang)可(ke)拆除(chu)電(dian)(dian)(dian)源(yuan)線，待機器*冷卻后裝機。

除日常的(de)(de)(de)檢(jian)(jian)(jian)查(cha)外(wai)，推(tui)薦(jian)檢(jian)(jian)(jian)查(cha)周(zhou)期為半(ban)年(nian)。在眾多的(de)(de)(de)檢(jian)(jian)(jian)查(cha)項目中(zhong)，重點要(yao)檢(jian)(jian)(jian)查(cha)的(de)(de)(de)是主(zhu)回(hui)路(lu)(lu)的(de)(de)(de)平滑電(dian)容(rong)(rong)器、邏輯控(kong)制回(hui)路(lu)(lu)、電(dian)源回(hui)路(lu)(lu)、逆(ni)變驅動保(bao)護回(hui)路(lu)(lu)中(zhong)的(de)(de)(de)電(dian)解電(dian)容(rong)(rong)器、冷卻(que)系(xi)統(tong)中(zhong)的(de)(de)(de)風扇等(deng)。除主(zhu)回(hui)路(lu)(lu)的(de)(de)(de)電(dian)容(rong)(rong)器外(wai)，其他(ta)電(dian)容(rong)(rong)器的(de)(de)(de)測定比較困(kun)難，因此主(zhu)要(yao)以(yi)外(wai)觀(guan)變化和運(yun)行時間為判斷的(de)(de)(de)基準。

朝陽西門子變頻器代理商

選擇和使用西門子(zi)變頻器時需(xu)注意的問(wen)題：

西門(men)子公(gong)司(si)可(ke)以(yi)提供不(bu)同(tong)類(lei)型(xing)的變(bian)頻(pin)器,用戶可(ke)以(yi)根據自己(ji)的實(shi)際工藝(yi)要求和運用 場合選(xuan)擇不(bu)同(tong)類(lei)型(xing)的變(bian)頻(pin)器。在選(xuan)擇變(bian)頻(pin)器時因注意以(yi)下(xia)幾點注意事頊:

1)根(gen)據負載特性(xing)選擇變頻(pin)(pin)器(qi),如負載為恒轉(zhuan)矩負載需選擇西(xi)門(men)子mmv/mdv, mm420/mm440變頻(pin)(pin)器(qi),如負載為風機、泵類負載應選擇西(xi)門(men)子430變頻(pin)(pin)器(qi)。

2)選擇變(bian)(bian)(bian)(bian)頻器(qi)(qi)時應以(yi)實際電(dian)(dian)動(dong)(dong)機(ji)電(dian)(dian)流值作為變(bian)(bian)(bian)(bian)頻器(qi)(qi)選擇的(de)依據(ju),電(dian)(dian)動(dong)(dong)機(ji)的(de)額定功 率只能作為參考。另外,應充分考慮變(bian)(bian)(bian)(bian)頻器(qi)(qi)的(de)輸出(chu)含(han)有豐富的(de)高次諧波(bo),會使(shi)電(dian)(dian)動(dong)(dong)機(ji)的(de) 功率因(yin)數和效率變(bian)(bian)(bian)(bian)差。因(yin)此,用變(bian)(bian)(bian)(bian)頻器(qi)(qi)給電(dian)(dian)動(dong)(dong)機(ji)供電(dian)(dian)與用工頻電(dian)(dian)網供電(dian)(dian)相比較,電(dian)(dian)動(dong)(dong)機(ji) 的(de)電(dian)(dian)流會增加(jia)10%而溫(wen)升會增加(jia)20%左右。所以(yi)在選擇電(dian)(dian)動(dong)(dong)機(ji)和變(bian)(bian)(bian)(bian)頻器(qi)(qi)時,應考慮到 這種情況,適(shi)當留有余量,以(yi)防止溫(wen)升過(guo)高,影響電(dian)(dian)動(dong)(dong)機(ji)的(de)使(shi)用壽(shou)命。

3)變(bian)頻(pin)器(qi)若(ruo)要(yao)長電(dian)(dian)(dian)纜(lan)運行時,此時應該(gai)采取措施抑制長電(dian)(dian)(dian)纜(lan)對地耦合電(dian)(dian)(dian)容的影響, 避免變(bian)頻(pin)器(qi)出(chu)力不夠。所以(yi)變(bian)頻(pin)器(qi)應放(fang)大一(yi)、兩擋選擇或在(zai)變(bian)頻(pin)器(qi)的輸出(chu)端安裝輸出(chu)電(dian)(dian)(dian) 抗器(qi)。 變(bian)頻(pin)器(qi)輸出(chu)動力電(dian)(dian)(dian)纜(lan)的長度(以(yi)mmv/mdv為例): (下(xia)表數(shu)據僅針對于西門(men)子(zi)變(bian)頻(pin)器(qi)和西門(men)子(zi)電(dian)(dian)(dian)動機)

4)當變(bian)(bian)頻器(qi)用于(yu)控(kong)制(zhi)并(bing)聯的(de)幾臺(tai)電(dian)(dian)(dian)動機(ji)時(shi),一定(ding)要考慮(lv)變(bian)(bian)頻器(qi)到電(dian)(dian)(dian)動機(ji)的(de)電(dian)(dian)(dian)纜(lan)的(de)長度總和在變(bian)(bian)頻器(qi)的(de)容(rong)許范圍內。如(ru)果超過(guo)規定(ding)值(zhi),要放大=擋或(huo)兩擋來選擇變(bian)(bian)頻器(qi),另外在此種情況下,變(bian)(bian)頻器(qi)的(de)控(kong)制(zhi)方式只能為v/f控(kong)制(zhi)方式,并(bing)且變(bian)(bian)頻器(qi)無法實現(xian)電(dian)(dian)(dian)動機(ji)的(de)過(guo)流(liu)、過(guo)載保護(hu),此時(shi)需在每臺(tai)電(dian)(dian)(dian)動機(ji)側加熔(rong)斷器(qi)來實現(xian)保護(hu)。

5)對(dui)于一些特殊的應用場合,如高(gao)環(huan)境溫度、高(gao)開關頻(pin)率、高(gao)海拔等,此(ci)時會引起變頻(pin)器(qi)的降容,變頻(pin)器(qi)需放(fang)大(da)一擋(dang)選擇。

6)使用變頻(pin)(pin)器控制高(gao)速電(dian)動機時,由于(yu)高(gao)速電(dian)動機的電(dian)抗(kang)小,會(hui)產生(sheng)較多的高(gao)次諧(xie)波。而這些高(gao)次諧(xie)波會(hui)使變頻(pin)(pin)器的輸(shu)出電(dian)流值增加(jia)。因此(ci),選擇用于(yu)高(gao)速電(dian)動機的變 頻(pin)(pin)器時,應比(bi)普通電(dian)動機的變頻(pin)(pin)器稍大一(yi)些。

7)變(bian)(bian)頻(pin)(pin)器用于變(bian)(bian)極(ji)電(dian)動機時(shi),應充分(fen)注意選擇變(bian)(bian)頻(pin)(pin)器的容量,使其額定電(dian)流在變(bian)(bian)頻(pin)(pin)器的額定輸出電(dian)流以(yi)下(xia)。另(ling)外,在運行中進行極(ji)數轉換(huan)時(shi),應先停(ting)止電(dian)動機工作,否則會造(zao)成電(dian)動機空轉,惡(e)劣時(shi)會造(zao)成變(bian)(bian)頻(pin)(pin)器損壞。

8)驅動(dong)防(fang)爆電動(dong)機時,變頻(pin)器(qi)沒有防(fang)爆構造,應將變頻(pin)器(qi)設置在危(wei)險場(chang)所之(zhi)外。

9)使用(yong)(yong)變頻器驅動(dong)齒輪(lun)減(jian)速電(dian)動(dong)機(ji)時(shi),使用(yong)(yong)范(fan)圍受到(dao)齒輪(lun)轉(zhuan)動(dong)部(bu)分潤滑(hua)方式的制(zhi)(zhi)約。潤滑(hua)油(you)潤滑(hua)時(shi),在低速范(fan)圍內(nei)沒(mei)有(you)限制(zhi)(zhi);在超(chao)過(guo)額定轉(zhuan)速以(yi)上的高速范(fan)圍內(nei),有(you)可能(neng)發生潤滑(hua)油(you)用(yong)(yong)光的危險。因(yin)此,不(bu)要超(chao)過(guo)高轉(zhuan)速容許(xu)值。

10)變頻器(qi)驅(qu)動(dong)(dong)繞線(xian)轉子異步電(dian)動(dong)(dong)機時(shi),大(da)(da)多(duo)(duo)是利用已有(you)的(de)電(dian)動(dong)(dong)機。繞線(xian)電(dian)動(dong)(dong)機與普通的(de)鼠籠電(dian)動(dong)(dong)機相比(bi),繞線(xian)電(dian)動(dong)(dong)機繞組的(de)阻抗(kang)小。因此,容易(yi)發生(sheng)由于紋波電(dian)流(liu)而引(yin)起(qi)的(de)過電(dian)流(liu)跳閘現(xian)象,所以應(ying)選擇比(bi)通常(chang)容量稍(shao)大(da)(da)的(de)變頻器(qi)。一(yi)般繞線(xian)電(dian)動(dong)(dong)機多(duo)(duo)用于飛輪力(li)矩gd2較大(da)(da)的(de)場合,在設定加減(jian)速時(shi)間時(shi)應(ying)多(duo)(duo)注意。