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電機維修后的整體檢查解決方案

文章出處:maituwangluo.com  |  發布時間:2018/1/6 10:47:49  |  瀏覽次數:559
電(dian)(dian)(dian)(dian)(dian)(dian)機維修(xiu)(xiu)后要注(zhu)意檢查哪些方面?電(dian)(dian)(dian)(dian)(dian)(dian)機為(wei)人們(men)生(sheng)產和生(sheng)活中(zhong)(zhong)提供著不可(ke)缺少的(de)重要動力,那么在電(dian)(dian)(dian)(dian)(dian)(dian)機的(de)使(shi)用(yong)過(guo)程(cheng)中(zhong)(zhong)由于(yu)操作(zuo)不當(dang)而造(zao)成電(dian)(dian)(dian)(dian)(dian)(dian)機的(de)運行過(guo)程(cheng)中(zhong)(zhong)的(de)故障時(shi)有發(fa)生(sheng),因此在電(dian)(dian)(dian)(dian)(dian)(dian)機使(shi)用(yong)一段(duan)時(shi)間后,高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)機維修(xiu)(xiu)廠家建議對電(dian)(dian)(dian)(dian)(dian)(dian)機進行維修(xiu)(xiu)。那么,電(dian)(dian)(dian)(dian)(dian)(dian)機維修(xiu)(xiu)后要注(zhu)意檢查哪些方面呢?一起(qi)來了解一下。

第一:電機外(wai)殼檢(jian)查

電(dian)機(ji)(ji)外殼檢(jian)(jian)(jian)查包括兩個方面(1)外殼:對于(yu)隔爆(bao)型電(dian)機(ji)(ji),應(ying)該檢(jian)(jian)(jian)查隔爆(bao)接合面的(de)間隙(xi)(間隙(xi)長度(du)和間隙(xi)寬度(du))是(shi)否符合產品原(yuan)圖紙(zhi)或防爆(bao)標準的(de)規定,如果外殼是(shi)新制的(de),還應(ying)該按照標準進(jin)行水(shui)壓試(shi)驗,檢(jian)(jian)(jian)查隔爆(bao)外殼的(de)機(ji)(ji)械(xie)強度(du)。如果是(shi)在原(yuan)來的(de)外殼上進(jin)行局部(bu)機(ji)(ji)械(xie)加工,則不(bu)必進(jin)行水(shui)壓試(shi)驗。其他防爆(bao)類型電(dian)機(ji)(ji)的(de)外殼是(shi)防護性(IP)殼體,這(zhe)類外殼維修后(hou)主要是(shi)檢(jian)(jian)(jian)查防護等(deng)(deng)級(ji)和機(ji)(ji)械(xie)強度(du)是(shi)否降低。(2)風扇、風扇罩、接線盒、電(dian)纜引入裝置等(deng)(deng)應(ying)按標準要求進(jin)行檢(jian)(jian)(jian)查。

第(di)二:檢查電(dian)氣方面

(1)繞(rao)(rao)組(zu):維修電(dian)(dian)(dian)動機(ji)(ji)常常需(xu)要更換繞(rao)(rao)組(zu),有些(xie)情況下僅僅需(xu)要對(dui)潮濕的(de)繞(rao)(rao)組(zu)進(jin)(jin)(jin)行干燥處(chu)理。繞(rao)(rao)組(zu)的(de)維修質量不(bu)但影響(xiang)電(dian)(dian)(dian)動機(ji)(ji)的(de)電(dian)(dian)(dian)氣性能(neng)(neng)指(zhi)標,而(er)且(qie)影響(xiang)電(dian)(dian)(dian)動機(ji)(ji)的(de)防爆性能(neng)(neng)。繞(rao)(rao)組(zu)更換后應該用電(dian)(dian)(dian)橋(qiao)或其他方法(fa)測量各相的(de)電(dian)(dian)(dian)阻,相電(dian)(dian)(dian)阻或線電(dian)(dian)(dian)阻應該平衡;用搖表測量各繞(rao)(rao)組(zu)間以及對(dui)地(di)的(de)絕緣(yuan)(yuan)電(dian)(dian)(dian)阻,并且(qie)進(jin)(jin)(jin)行繞(rao)(rao)組(zu)對(dui)地(di)、相間絕緣(yuan)(yuan)耐(nai)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)(yan)(yan)。對(dui)于(yu)原來的(de)繞(rao)(rao)組(zu),在進(jin)(jin)(jin)行耐(nai)壓(ya)(ya)(ya)(ya)試(shi)驗(yan)(yan)(yan)(yan)時(shi)試(shi)驗(yan)(yan)(yan)(yan)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)應該降低(di)(試(shi)驗(yan)(yan)(yan)(yan)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的(de)80%)。(2)電(dian)(dian)(dian)動機(ji)(ji)空載試(shi)驗(yan)(yan)(yan)(yan)和降低(di)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)下堵(du)轉試(shi)驗(yan)(yan)(yan)(yan)。(3)如果需(xu)要,進(jin)(jin)(jin)行型式(shi)試(shi)驗(yan)(yan)(yan)(yan)或部分型式(shi)試(shi)驗(yan)(yan)(yan)(yan)項目。對(dui)于(yu)增安型電(dian)(dian)(dian)動機(ji)(ji),應該進(jin)(jin)(jin)行溫(wen)升試(shi)驗(yan)(yan)(yan)(yan)。

第三(san):電機(ji)維(wei)修(xiu)后(hou)的整體檢查

(1)防爆標志(zhi)牌(pai)、銘牌(pai)、警(jing)告牌(pai)是(shi)否(fou)(fou)完好;(2)接(jie)地端子、標志(zhi)是(shi)否(fou)(fou)完好;(3)旋轉零件(jian)的潤滑、表面(mian)涂(tu)附;(4)維修合格標志(zhi)、文(wen)件(jian)(試(shi)驗報告、說明書(shu))以及相關(guan)附件(jian)等(deng);(5)檢查(cha)和試(shi)驗結果記錄并存檔備查(cha)目前,無刷直流電(dian)機功率(lv)(lv)因(yin)數校(xiao)(xiao)正(zheng)技術(shu)在中(zhong)小功率(lv)(lv)單相電(dian)源系統(tong)應用較為廣泛[8]。如何(he)優化單相功率(lv)(lv)因(yin)數校(xiao)(xiao)正(zheng)電(dian)路 、控(kong)制算法和三相大功率(lv)(lv)功率(lv)(lv)因(yin)數校(xiao)(xiao)正(zheng)技術(shu)是(shi)功率(lv)(lv)因(yin)數校(xiao)(xiao)正(zheng)技術(shu)研(yan)究的熱點,主(zhu)要研(yan)究方向(xiang):
 
1 軟(ruan)開(kai)關技術與(yu)(yu)功率(lv)因數(shu)校(xiao)正(zheng)電(dian)路相結合,即(ji)軟(ruan)開(kai)關 PFC[11]。如前所述功率(lv)因數(shu)校(xiao)正(zheng)是在整流(liu)電(dian)路與(yu)(yu)儲能電(dian)容間增加了(le)一級(ji)功率(lv)變換,減低(di)了(le)整體效率(lv)。軟(ruan)開(kai)關PFC 旨在減少開(kai)關損耗,降低(di)EMI[9]。
 
2 功率因(yin)數校(xiao)正(zheng)技術(shu)新的(de)控(kong)制算法,電(dian)(dian)壓電(dian)(dian)流雙閉(bi)環(huan) PI 調節功率因(yin)數校(xiao)正(zheng)技術(shu)是目前主要應(ying)用的(de)控(kong)制算法。如何應(ying)用現代控(kong)制理論優化功率因(yin)數校(xiao)正(zheng)技術(shu)成(cheng)為研究的(de)熱點之一(yi)。
 
3 三相(xiang)(xiang)有(you)源(yuan)功(gong)率(lv)(lv)因(yin)(yin)數校(xiao)(xiao)正(zheng)技(ji)術,單相(xiang)(xiang)功(gong)率(lv)(lv)因(yin)(yin)數校(xiao)(xiao)正(zheng)技(ji)術只適(shi)用于中小功(gong)率(lv)(lv)場(chang)合(he),大功(gong)率(lv)(lv)領域仍(reng)舊采用無(wu)源(yuan)功(gong)率(lv)(lv)因(yin)(yin)數校(xiao)(xiao)正(zheng),如何簡化電路(lu)結構,各相(xiang)(xiang)之(zhi)間解耦及控制算法是三相(xiang)(xiang)有(you)源(yuan)功(gong)率(lv)(lv)因(yin)(yin)數校(xiao)(xiao)正(zheng)的主要(yao)內容。
 
4 基于(yu)單(dan)片機或者 DSP 的(de)(de)有(you)源功率因(yin)數校正的(de)(de)數字(zi)控制
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