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電機有機械故障與電氣故障兩大類的區別

文章出處:maituwangluo.com  |  發布時間:2017/11/24 11:32:42  |  瀏覽次數:549
電動車應用越來越普遍,其維修中電機(ji)的故(gu)(gu)障(zhang)(zhang)有機(ji)械故(gu)(gu)障(zhang)(zhang)與(yu)電氣故(gu)(gu)障(zhang)(zhang)兩大類,機(ji)械故(gu)(gu)障(zhang)(zhang)比較容易發現,而電氣故(gu)(gu)障(zhang)(zhang)就要通(tong)過測(ce)量其電壓或電流進行分析判斷了,以(yi)下介紹電動車電機(ji)常(chang)見故(gu)(gu)障(zhang)(zhang)檢測(ce)與(yu)排除方法。 
    一、電(dian)機發熱(re)
    用萬用表的(de)(de)溫度(du)測量(liang)檔位測量(liang)電機(ji)端蓋的(de)(de)溫度(du)超(chao)過環(huan)境(jing)溫度(du)30~C以上(shang)時,表明電機(ji)的(de)(de)溫升(sheng)(sheng)已經超(chao)出了正(zheng)常范圍,一般電機(ji)的(de)(de)溫升(sheng)(sheng)在(zai)25℃ 以下。電機(ji)發(fa)熱的(de)(de)直接(jie)原因(yin)是(shi)由于電流大(da)引(yin)起的(de)(de)。一般是(shi)磁(ci)鋼退磁(ci)引(yin)起的(de)(de)或者是(shi)線圈(quan)短路(lu)(lu)、開(kai)路(lu)(lu)引(yin)起的(de)(de)。維修(xiu)實(shi)踐中處理電機(ji)發(fa)熱的(de)(de)故障一般是(shi)更換電機(ji)。
    二、電機(ji)的(de)空載電流大
    測量方法(fa)如下: 用(yong)萬(wan)用(yong)表(biao)(biao)(biao)的(de)(de)(de) 20A檔(dang)位,把(ba)萬(wan)用(yong)表(biao)(biao)(biao)的(de)(de)(de)紅黑表(biao)(biao)(biao)筆串聯接在(zai)控制器(qi)的(de)(de)(de)電(dian)(dian)(dian)(dian)源輸入端。打開電(dian)(dian)(dian)(dian)源,在(zai)電(dian)(dian)(dian)(dian)機(ji)不轉(zhuan)(zhuan)動(dong)的(de)(de)(de)情況下,記錄下此時萬(wan)用(yong)表(biao)(biao)(biao)的(de)(de)(de)最大電(dian)(dian)(dian)(dian)流(liu)數(shu)值A1,轉(zhuan)(zhuan)動(dong)轉(zhuan)(zhuan)把(ba),使電(dian)(dian)(dian)(dian)機(ji)高速空(kong)載(zai)(zai)轉(zhuan)(zhuan)動(dong)10秒鐘以上,電(dian)(dian)(dian)(dian)機(ji)轉(zhuan)(zhuan)速穩定以后,開始觀(guan)察并記錄此時萬(wan)用(yong)表(biao)(biao)(biao)的(de)(de)(de)最大數(shu)值A2。電(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)空(kong)載(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)=A2-A1。當電(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)空(kong)載(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)大于(yu)參(can)考表(biao)(biao)(biao)極(ji)限數(shu)據時,表(biao)(biao)(biao)明(ming)電(dian)(dian)(dian)(dian)機(ji)出現了(le)故(gu)障。電(dian)(dian)(dian)(dian)機(ji)空(kong)載(zai)(zai)電(dian)(dian)(dian)(dian)流(liu)大的(de)(de)(de)原因有: (1)電(dian)(dian)(dian)(dian)機(ji)內部(bu)機(ji)械摩擦大。 (2)線(xian)圈局部(bu)短路。(3)磁鋼退磁。我們繼續往下做有關的(de)(de)(de)測試(shi)與檢查(cha)項(xiang)目 可以進(jin)一步判斷(duan)出故(gu)障原因或(huo)故(gu)障部(bu)位。
    三、電機(ji)在運行時(shi)內部有機(ji)械碰撞或機(ji)械噪音
    無論高速電(dian)機(ji)(ji)還是(shi)低速電(dian)機(ji)(ji),在(zai)負載運行時都不(bu)(bu)應該出現(xian)機(ji)(ji)械(xie)碰(peng)撞或不(bu)(bu)連續不(bu)(bu)規則(ze)的機(ji)(ji)械(xie)噪音。不(bu)(bu)同(tong)形式的電(dian)機(ji)(ji)可運用不(bu)(bu)同(tong)的方法進行維修。
    四、 無刷電(dian)機缺相
    無刷電機(ji)缺相一般是由于無刷電機(ji)的(de)霍(huo)(huo)(huo)(huo)耳(er)元件損壞引(yin)(yin)起的(de)。我(wo)們可以通過測(ce)量(liang)霍(huo)(huo)(huo)(huo)耳(er)元件輸出(chu)引(yin)(yin)線(xian)相對霍(huo)(huo)(huo)(huo)耳(er)地線(xian)和相對霍(huo)(huo)(huo)(huo)耳(er)電源的(de)引(yin)(yin)線(xian)的(de)電阻(zu),用比較(jiao)法判斷是哪(na)只霍(huo)(huo)(huo)(huo)耳(er)元件出(chu)現故障。
    五(wu)、整車行駛里(li)程縮短、電(dian)機乏(fa)力
    車續(xu)(xu)行里(li)(li)程(cheng)(cheng)短(duan)與電機乏(fa)力(俗稱電機沒勁)的(de)原因比較復雜(za)。但是(shi)當我們排除(chu)了(le)以上4種(zhong)電機故(gu)障(zhang)之(zhi)后,一般(ban)說來,整車續(xu)(xu)行里(li)(li)程(cheng)(cheng)短(duan)的(de)故(gu)障(zhang)就不是(shi)電機引起的(de)了(le),這和電池容量的(de)衰(shuai)減,充電器充不滿電,控制(zhi)器參數(shu)漂(piao)移(yi)等有關。
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一.繞線
高壓(ya)電(dian)機(ji)(ji)(ji)(ji)按(an)電(dian)壓(ya)等級需要選用(yong)雙亞胺,單亞胺,單薄雙絲(si)等各(ge)種規格(ge)的(de)(de)絲(si)包(bao)扁線(xian)(xian)(xian)(xian),材料齊備后(hou),可(ke)(ke)(ke)在(zai)繞(rao)(rao)線(xian)(xian)(xian)(xian)機(ji)(ji)(ji)(ji)上(shang)繞(rao)(rao)制(zhi)制(zhi)成梭型(xing)成圈(quan)(quan),一(yi)般(ban)電(dian)機(ji)(ji)(ji)(ji)最(zui)短線(xian)(xian)(xian)(xian)圈(quan)(quan)直線(xian)(xian)(xian)(xian)部分(fen)25厘米(mi) ,最(zui)大線(xian)(xian)(xian)(xian)圈(quan)(quan)直線(xian)(xian)(xian)(xian)部分(fen) 1.2米(mi),繞(rao)(rao)制(zhi)可(ke)(ke)(ke)單平(ping)繞(rao)(rao),單立繞(rao)(rao),也(ye)可(ke)(ke)(ke)雙平(ping)換位繞(rao)(rao),也(ye)可(ke)(ke)(ke)雙平(ping)換位立繞(rao)(rao),根據具體要求確(que)定。利用(yong)圓(yuan)(yuan)盤中的(de)(de)萬能調節也(ye)可(ke)(ke)(ke)繞(rao)(rao)制(zhi)圓(yuan)(yuan)漆包(bao)線(xian)(xian)(xian)(xian)線(xian)(xian)(xian)(xian)圈(quan)(quan)。繞(rao)(rao)線(xian)(xian)(xian)(xian)機(ji)(ji)(ji)(ji)內置一(yi)臺調速電(dian)機(ji)(ji)(ji)(ji)與(yu)一(yi)臺渦輪(lun)渦桿減速機(ji)(ji)(ji)(ji),帶動(dong)繞(rao)(rao)線(xian)(xian)(xian)(xian)機(ji)(ji)(ji)(ji)實(shi)現(xian)0-120轉(zhuan)/分(fen)的(de)(de)可(ke)(ke)(ke)順逆可(ke)(ke)(ke)制(zhi)動(dong)的(de)(de)旋轉(zhuan),并可(ke)(ke)(ke)正反(fan)計(ji)數,一(yi)般(ban)可(ke)(ke)(ke)繞(rao)(rao)制(zhi)1600KW以內的(de)(de)各(ge)種電(dian)機(ji)(ji)(ji)(ji)線(xian)(xian)(xian)(xian)圈(quan)(quan),另配有簡易漲緊(jin)(jin)器一(yi)套,可(ke)(ke)(ke)控制(zhi)繞(rao)(rao)制(zhi)線(xian)(xian)(xian)(xian)圈(quan)(quan)的(de)(de)松緊(jin)(jin)度,一(yi)般(ban)的(de)(de)修理廠家選用(yong)如上(shang)產品(pin)即可(ke)(ke)(ke),如遇到特殊大型(xing)規格(ge)時,可(ke)(ke)(ke)選擇特異型(xing)繞(rao)(rao)制(zhi)設備。
二.成型前包扎
高壓電機(ji)梭型線(xian)圈繞(rao)制(zhi)后 ,用(yong)收縮(suo)帶 ,黃(huang)蠟(la)綢帶等(deng)絕(jue)緣(yuan)材(cai)料包扎(zha),目的是(shi):保護線(xian)圈外絕(jue)緣(yuan)、層間(jian)絕(jue)緣(yuan)、匝間(jian)絕(jue)緣(yuan)不至于損壞。在拉型機(ji)時免受模(mo)具夾具、鼻端(duan)銷(xiao)釘等(deng)摩擦,防止松動變形。
包扎線圈一般用(yong)女(nv)(nv)工,由(you)于女(nv)(nv)工心細(xi)手(shou)巧且干(gan)活速度快,一般3-5人包扎供拉(la)型。也可使用(yong)電動包帶機.
三.成型(xing)
成(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)機、漲型(xing)(xing)(xing)(xing)機、拉(la)(la)(la)型(xing)(xing)(xing)(xing)機其實是一(yi)(yi)(yi)種機器,它(ta)主(zhu)要目的(de)(de)是把繞線(xian)(xian)(xian)機繞制(zhi)的(de)(de)立繞梭(suo)型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)或平繞梭(suo)型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)拉(la)(la)(la)成(cheng)(cheng)(cheng)(cheng)框行線(xian)(xian)(xian)圈(quan),框型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)以電機定(ding)子鐵心的(de)(de)內(nei)外圓為(wei)標準,組成(cheng)(cheng)(cheng)(cheng)向(xiang)心式的(de)(de)有(you)角(jiao)度的(de)(de)線(xian)(xian)(xian)圈(quan),繞制(zhi)梭(suo)型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)需技工 2人即(ji)可(ke)完成(cheng)(cheng)(cheng)(cheng) ,而拉(la)(la)(la)(漲)型(xing)(xing)(xing)(xing)一(yi)(yi)(yi)般(ban)需3人。過去在沒有(you)成(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)機以前,我處(chu)有(you)幾位老練的(de)(de)師傅(fu)可(ke)手拉(la)(la)(la)成(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing),可(ke)在15分(fen)鐘將72只線(xian)(xian)(xian)圈(quan)手工拉(la)(la)(la)制(zhi)成(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing),但對于較(jiao)大型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)拉(la)(la)(la)型(xing)(xing)(xing)(xing)顯現的(de)(de)有(you)些吃力。而利(li)用拉(la)(la)(la)型(xing)(xing)(xing)(xing)機一(yi)(yi)(yi)般(ban)一(yi)(yi)(yi)個小時內(nei)3人可(ke)規范的(de)(de)拉(la)(la)(la)出(chu)72只線(xian)(xian)(xian)圈(quan)來,每只成(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)線(xian)(xian)(xian)圈(quan)直(zhi)線(xian)(xian)(xian)部分(fen)最(zui)長可(ke)調(diao)(diao)整到1.5米,高度可(ke)調(diao)(diao)整在80公分(fen) 以內(nei),角(jiao)度調(diao)(diao)整范圍(wei)為(wei) 0-60度,四只夾具可(ke)實現萬(wan)能鎖定(ding)。一(yi)(yi)(yi)般(ban)的(de)(de)廠家,如(ru)哈爾濱一(yi)(yi)(yi)家電機廠,湘潭(tan)電機廠一(yi)(yi)(yi)下屬廠等十余家購買(mai)到這一(yi)(yi)(yi)手動(dong)拉(la)(la)(la)型(xing)(xing)(xing)(xing)機以后,總的(de)(de)評價是制(zhi)作看似(si)簡單,但操作靈活、方(fang)便,上(shang)模塊
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