TU532
TU532
(1)用細砂紙研磨電刷接觸面,并用干凈布擦磨電刷與換向器接觸處,裝好電刷,通入電壓,使直流電動機在低轉(zhuǎn)速輕載下空轉(zhuǎn)1h左右。
(2)用細砂紙稍微磨小電刷,使電刷在刷架內(nèi)上下活動自如。
(3)按直流電動機原來的型號和尺寸更換質(zhì)量合格的新電刷。
(4)重新調(diào)整電刷的分布位置。
(5)按正確的方向重新連接換向極繞組的接線,并用500V兆歐表搖測其絕緣情況,線圈短路嚴(yán)重時應(yīng)更換線圈。
(6)打開直流電動機,認(rèn)真查找電樞繞組與換向器脫焊點,并重新焊接。
(7)調(diào)整刷桿座至原位或用感應(yīng)方法重新查找出電刷中性線位置。 例如,在電動機停電時,將毫伏表接到相鄰兩組的電刷上,勵磁繞組串聯(lián)一個開關(guān),接上3V電池,當(dāng)通斷開關(guān)時,毫伏表指針即左右擺動,這樣連續(xù)反復(fù)通斷開關(guān),將電刷架位置來回移動,直到指針擺動小時,電刷位置即正好在中性線上
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