EX200-5挖掘機(ji)進行點火鑰(yao)(yao)匙(chi)置(zhi)on位置(zhi)時,EC馬達(da)(da)(da)油門(men)拉(la)臂不(bu)能滿足正(zheng)常(chang)工作回(hui)到(dao)起動油門(men)位置(zhi),而(er)是(shi)EC馬達(da)(da)(da)作為輸(shu)出(chu)軸轉(zhuan)動一個(ge)角度變化過大,即使我們重新開始(shi)調整EC馬達(da)(da)(da)怠(dai)速,點火鑰(yao)(yao)匙(chi)從off轉(zhuan)至(zhi)on位置(zhi)后,EC馬達(da)(da)(da)油門(men)拉(la)臂仍不(bu)能影響正(zheng)常(chang)生活回(hui)到(dao)起動油門(men)位置(zhi),以致企業無法及時啟動發動機(ji).

日(ri)立EX200-5挖掘機的發動(dong)機無法啟動(dong)故(gu)障排(pai)除(chu)步驟：

1、斷開(kai)EC馬達進行控(kong)制線(xian)接頭(tou),點火鑰匙從off轉(zhuan)至on位置時(shi)用示波(bo)器可(ke)以檢測(ce)MC控(kong)制系統信(xin)號輸(shu)出電壓電流波(bo)形,結果顯示正(zheng)常(chang).

2.用萬用表檢測EC電(dian)機兩(liang)組線圈電(dian)阻，結果正(zheng)常。修理挖(wa)掘機(ji)常見(jian)的挖(wa)掘機(ji)結構(gou)包括，動(dong)力(li)裝(zhuang)置，工作裝(zhuang)置，回轉機(ji)構(gou)，操縱機(ji)構(gou)，傳動(dong)機(ji)構(gou)，行走機(ji)構(gou)和輔助設(she)施等。維(wei)修挖掘機(ji)第一臺(tai)液(ye)(ye)壓挖(wa)掘(jue)機(ji)(ji)由(you)法國波(bo)克蘭工廠(chang)發明成功(gong)。由(you)于(yu)液(ye)(ye)壓技術的應用，20世紀40年代有了在拖拉機(ji)(ji)上配(pei)裝液(ye)(ye)壓反鏟地懸(xuan)掛(gua)式挖(wa)掘(jue)機(ji)(ji)。挖掘機(ji)修理最初挖(wa)掘機(ji)(ji)(ji)是手動(dong)(dong)的(de)(de)，從發明到(dao)現在已經有(you)一百三十多(duo)年了，期(qi)間經歷了由蒸汽(qi)驅動(dong)(dong)斗(dou)回(hui)(hui)轉挖(wa)掘機(ji)(ji)(ji)到(dao)電力驅動(dong)(dong)和(he)內燃機(ji)(ji)(ji)驅動(dong)(dong)回(hui)(hui)轉挖(wa)掘機(ji)(ji)(ji)、應(ying)用機(ji)(ji)(ji)電液一體化技術的(de)(de)全自動(dong)(dong)液壓挖(wa)掘機(ji)(ji)(ji)的(de)(de)逐步(bu)發展過程。

圖3。 斷開(kai)電(dian)控馬(ma)達位置(zhi)傳感器(qi)的導線接頭，用(yong)高阻數字(zi)萬用(yong)表檢測發動機控制撥(bo)號盤單元(yuan)在點(dian)火開(kai)關位置(zhi)時的輸出電(dian)壓(ya)。 結果很正常(chang)。

4傳感器檢測所述(shu)電阻萬用表EC電動機(ji)位置，其結果是正常的。

5、拆檢EC馬達,發(fa)現EC馬達位置信息傳(chuan)感器(qi)數據(ju)輸(shu)入軸(zhou)傳(chuan)動(dong)齒(chi)輪為(wei)黑色(se)橡膠復合材(cai)(cai)料所制,材(cai)(cai)質較軟,由于企(qi)業使(shi)用不同時間(jian)過(guo)長,橡膠齒(chi)輪與傳(chuan)感器(qi)網(wang)絡輸(shu)入軸(zhou)配(pei)合的 孔變(bian)大,齒(chi)輪之間(jian)不能發(fa)展帶動(dong)其(qi)他傳(chuan)感器(qi)軸(zhou)同步轉(zhuan)動(dong).故(gu)障(zhang)分析處(chu)理方式方法:更(geng)換傳(chuan)感器(qi)齒(chi)輪,裝配(pei)試車(che),故(gu)障(zhang)可以(yi)消除.

日立(li) ex200-5挖掘機(ji)發(fa)動機(ji)故障分析:

EC馬(ma)達(da)位置信息傳(chuan)(chuan)(chuan)感器技術實際上我們就(jiu)是(shi)(shi)這樣一個具有(you)可變電(dian)(dian)(dian)阻(zu)器.挖掘機MC控制(zhi)(zhi)EC馬(ma)達(da)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)不同(tong)角度的 大小,是(shi)(shi)通過分析檢測系統傳(chuan)(chuan)(chuan)感器網絡(luo)輸(shu)出(chu)工作(zuo)電(dian)(dian)(dian)壓值(zhi)(zhi)來確定(ding)的 ,當(dang)傳(chuan)(chuan)(chuan)感器數據輸(shu)出(chu)電(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)壓值(zhi)(zhi)小于(yu)MC設定(ding)值(zhi)(zhi)時(shi),MC繼(ji)續(xu)輸(shu)給EC馬(ma)達(da)內部控制(zhi)(zhi)存(cun)在脈沖電(dian)(dian)(dian)壓,使(shi)(shi)EC馬(ma)達(da)繼(ji)續(xu)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong),EC馬(ma)達(da)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)同(tong)時(shi),帶動(dong)(dong)(dong)企業位于(yu)EC馬(ma)達(da)內的 傳(chuan)(chuan)(chuan)感器齒輪(lun),齒輪(lun)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong)使(shi)(shi)傳(chuan)(chuan)(chuan)感器作(zuo)為輸(shu)入軸(zhou)轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong),改變這種(zhong)傳(chuan)(chuan)(chuan)感器阻(zu)值(zhi)(zhi),從而使(shi)(shi)這些(xie)傳(chuan)(chuan)(chuan)感器模塊輸(shu)出(chu)電(dian)(dian)(dian)壓值(zhi)(zhi)發(fa)生發(fa)展變化.當(dang)傳(chuan)(chuan)(chuan)感器主要輸(shu)出(chu)電(dian)(dian)(dian)壓值(zhi)(zhi)等于(yu)MC設定(ding)值(zhi)(zhi)時(shi),MC停(ting)止輸(shu)給EC馬(ma)達(da)控制(zhi)(zhi)相關(guan)信號,使(shi)(shi)EC馬(ma)達(da)停(ting)止轉(zhuan)(zhuan)(zhuan)動(dong)(dong)(dong).

在這種情(qing)況下(xia)，電(dian)機(ji)(ji)位(wei)(wei)置(zhi)(zhi)(zhi)傳(chuan)感(gan)器齒(chi)輪和(he)軸配合間隙過大。 當 ec 電(dian)機(ji)(ji)轉(zhuan)動(dong)(dong)(dong)(dong)時，齒(chi)輪并不同步(bu)驅動(dong)(dong)(dong)(dong)傳(chuan)感(gan)器軸，相(xiang)反，傳(chuan)感(gan)器軸，以(yi)小(xiao)于齒(chi)輪的角度旋(xuan)轉(zhuan)，所以(yi)即使(shi) mc 發出(chu)(chu)信(xin)號(hao)控(kong)制(zhi)(zhi)發動(dong)(dong)(dong)(dong)機(ji)(ji)油門到起(qi)(qi)動(dong)(dong)(dong)(dong)位(wei)(wei)置(zhi)(zhi)(zhi)，然(ran)而(er)，mc 檢(jian)測(ce)到的傳(chuan)感(gan)器輸(shu)出(chu)(chu)電(dian)壓(ya)低于設定(ding)值，所以(yi) mc 繼續控(kong)制(zhi)(zhi) ec 電(dian)機(ji)(ji)的旋(xuan)轉(zhuan)，而(er)事實上 ec 電(dian)機(ji)(ji)已經通過了(le)發動(dong)(dong)(dong)(dong)機(ji)(ji)的起(qi)(qi)動(dong)(dong)(dong)(dong)位(wei)(wei)置(zhi)(zhi)(zhi)，達到了(le)熄火位(wei)(wei)置(zhi)(zhi)(zhi)，這就是為什么(me)發動(dong)(dong)(dong)(dong)機(ji)(ji)不能啟動(dong)(dong)(dong)(dong)。