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電(dian)(dian)(dian)(dian)機(ji)是(shi)利用電(dian)(dian)(dian)(dian)磁感應(ying)現象將電(dian)(dian)(dian)(dian)能轉換成機(ji)械(xie)能的(de)(de)(de)(de)(de)(de)裝置，電(dian)(dian)(dian)(dian)機(ji)驅動(dong)(dong)負載(zai)(zai)的(de)(de)(de)(de)(de)(de)增(zeng)加(jia)可直接影響(xiang)輸入功率的(de)(de)(de)(de)(de)(de)增(zeng)加(jia)。當電(dian)(dian)(dian)(dian)機(ji)帶(dai)動(dong)(dong)的(de)(de)(de)(de)(de)(de)負載(zai)(zai)或扭矩增(zeng)加(jia)時，電(dian)(dian)(dian)(dian)機(ji)逐(zhu)漸變(bian)(bian)慢(man)，輸入電(dian)(dian)(dian)(dian)流(liu)(liu)增(zeng)加(jia)，無(wu)論是(shi)扭矩增(zeng)加(jia)還是(shi)轉速的(de)(de)(de)(de)(de)(de)變(bian)(bian)化(hua)，都會改變(bian)(bian)電(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)。負載(zai)(zai)稍(shao)許(xu)地變(bian)(bian)動(dong)(dong)就會引起電(dian)(dian)(dian)(dian)機(ji)50 Hz電(dian)(dian)(dian)(dian)源(yuan)上電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)(de)(de)波動(dong)(dong)，使用靈敏度*的(de)(de)(de)(de)(de)(de)設備能夠采集(ji)到(dao)此波動(dong)(dong)信(xin)號(hao)。它能覺(jue)察到(dao)負載(zai)(zai)扭矩或速度的(de)(de)(de)(de)(de)(de)變(bian)(bian)化(hua)。由于不(bu)(bu)平衡、不(bu)(bu)對(dui)中、齒(chi)輪和皮帶(dai)磨損、摩擦阻力、往復式元(yuan)件等引起機(ji)械(xie)振動(dong)(dong)而產生了這些負載(zai)(zai)的(de)(de)(de)(de)(de)(de)變(bian)(bian)動(dong)(dong)，因此探測的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)波動(dong)(dong)就可作(zuo)為機(ji)械(xie)診斷和電(dian)(dian)(dian)(dian)氣診斷的(de)(de)(de)(de)(de)(de)信(xin)息。電(dian)(dian)(dian)(dian)壓和電(dian)(dian)(dian)(dian)流(liu)(liu)是(shi)一個檢測電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)故障的(de)(de)(de)(de)(de)(de)非常好的(de)(de)(de)(de)(de)(de)狀態監測參數，在不(bu)(bu)影響(xiang)電(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)運行的(de)(de)(de)(de)(de)(de)條件下(xia)對(dui)電(dian)(dian)(dian)(dian)流(liu)(liu)和電(dian)(dian)(dian)(dian)壓信(xin)號(hao)進行頻譜分析即和可檢測各種故障。

然而，當(dang)電機(ji)定子繞組發生(sheng)匝(za)間短(duan)路，繞組污染，阻(zu)抗(kang)，電阻(zu)R、阻(zu)抗(kang)Z、電感L 、相位角Φ°、倍(bei)頻I/F、產生(sheng)不平衡(heng)變(bian)化(hua)時(shi)，電機(ji)運行狀態發生(sheng)變(bian)化(hua)，電機(ji)效率下降，電機(ji)突然停機(ji)率提(ti)高(gao)，造(zao)成設備二次(ci)損(sun)失率會大(da)增。本文會詳細講解如何快速診斷這些問題。

電機(ji)，狀態監(jian)測，轉子斷條(tiao)，不(bu)平衡不(bu)對中，三相不(bu)平衡參數，美國(guo)技術倍頻(pin)I/F

1，  電機好(hao)壞不取決于三相電阻值平衡，認為(wei)三相平衡是(shi)電阻值的(de)平衡是(shi)錯誤的(de)

2，  電機(ji)運行(xing)中三(san)相(xiang)電流的平(ping)衡與否要看三(san)相(xiang)阻抗是(shi)否平(ping)衡，

3，電機匝間短(duan)路與(yu)阻值的降(jiang)低不成正比(bi)

4，高壓絕(jue)緣測試對投入運行的(de)電機進行測試屬于破壞(huai)性(xing)試驗，降低(di)電機的(de)壽命(ming)

5，搖表測試(shi)大部分是在電(dian)機已(yi)經不能(neng)工作時(shi)對電(dian)機測試(shi)，為時(shi)已(yi)晚。達不到預知維修的目的。

6，不停機測試電機，來判斷電機狀態好(hao)壞，以前(qian)還沒有(you)更好(hao)的(de)辦法，

7，電(dian)機存在機械(xie)問(wen)題(ti)還是電(dian)氣問(wen)題(ti)，有時(shi)也(ye)是棘手的問(wen)題(ti)

二、解決問題的正確方法

美(mei)國是較早引入(ru)電(dian)(dian)(dian)(dian)機(ji)狀(zhuang)態檢測的(de)國家，zui早是出于(yu)對(dui)位于(yu)核(he)反應堆內(nei)部的(de)電(dian)(dian)(dian)(dian)動機(ji)進行狀(zhuang)態監測的(de)需求，以保證設備安全和(he)人員安全，對(dui)內(nei)部電(dian)(dian)(dian)(dian)機(ji)的(de)測試和(he)對(dui)運行電(dian)(dian)(dian)(dian)機(ji)參數的(de)分析和(he)提取以獲得對(dui)電(dian)(dian)(dian)(dian)機(ji)狀(zhuang)態的(de)評估，工作量大且復雜，時間長，不能及時反映(ying)電(dian)(dian)(dian)(dian)機(ji)的(de)當(dang)時狀(zhuang)態，經過多次的(de)電(dian)(dian)(dian)(dian)機(ji)研(yan)究表明電(dian)(dian)(dian)(dian)機(ji)的(de)電(dian)(dian)(dian)(dian)流總是被其(qi)內(nei)部的(de)故障狀(zhuang)態所影(ying)響，研(yan)制出了新的(de)電(dian)(dian)(dian)(dian)流和(he)電(dian)(dian)(dian)(dian)壓信(xin)(xin)號調理技(ji)術，用于(yu)對(dui)信(xin)(xin)號的(de)分析以確定電(dian)(dian)(dian)(dian)機(ji)存在的(de)內(nei)部和(he)外部故障的(de)性質(zhi)。