直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)是指(zhi)能(neng)(neng)(neng)(neng)將(jiang)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)(neng)轉(zhuan)換(huan)成機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)(neng)（直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)）或將(jiang)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)(neng)轉(zhuan)換(huan)成直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)(neng)（直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)）的(de)(de)旋轉(zhuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)。它是能(neng)(neng)(neng)(neng)實現直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)(neng)和(he)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)(neng)互(hu)相轉(zhuan)換(huan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)。當它作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)運行(xing)(xing)時是直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)(ji)(ji)(ji)(ji)(ji)，將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)(neng)轉(zhuan)換(huan)為(wei)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)(neng)；作(zuo)(zuo)發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)運行(xing)(xing)時是直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)發電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)，將(jiang)機(ji)(ji)(ji)(ji)(ji)(ji)械能(neng)(neng)(neng)(neng)轉(zhuan)換(huan)為(wei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)(neng)(neng)。直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)的(de)(de)結構應由定(ding)子和(he)轉(zhuan)子兩大部分組成。直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)運行(xing)(xing)時靜(jing)止不動(dong)(dong)的(de)(de)部分稱(cheng)為(wei)定(ding)子，定(ding)子的(de)(de)主要作(zuo)(zuo)用是產(chan)生磁場，由機(ji)(ji)(ji)(ji)(ji)(ji)座(zuo)、主磁極(ji)、換(huan)向(xiang)極(ji)、端蓋(gai)、軸承和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)刷裝置等組成。直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)按照結構分為(wei)他(ta)勵直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)、并勵直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)、、串(chuan)勵直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)、復勵直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)；直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)按照使用需求(qiu)通(tong)常需要搭載減速齒輪(lun)箱、行(xing)(xing)星齒輪(lun)箱、圓(yuan)柱齒輪(lun)箱、平行(xing)(xing)齒輪(lun)箱等，這種產(chan)品(pin)稱(cheng)為(wei)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)減速電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)；直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)減速電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)(ji)廣(guang)泛應用于機(ji)(ji)(ji)(ji)(ji)(ji)械設(she)備產(chan)品(pin)、機(ji)(ji)(ji)(ji)(ji)(ji)器人、船舶(bo)工業、通(tong)訊設(she)備、汽車傳動(dong)(dong)等領域(yu)。

“交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)”是用于(yu)實現機(ji)(ji)(ji)(ji)(ji)械能(neng)和交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)能(neng)相(xiang)互轉換的(de)(de)(de)機(ji)(ji)(ji)(ji)(ji)械。由(you)于(yu)交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)力系統(tong)的(de)(de)(de)巨大(da)(da)發(fa)展(zhan)，交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)已成為最常用的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)。交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)與直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)相(xiang)比，由(you)于(yu)沒有換向(xiang)器（見直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)換向(xiang)），因(yin)此(ci)結構簡單，制(zhi)造方便，比較牢固，容(rong)易(yi)做成高轉速(su)、高電(dian)(dian)(dian)(dian)(dian)(dian)壓、大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)、大(da)(da)容(rong)量的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)。交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)功率的(de)(de)(de)覆蓋范圍很大(da)(da)，從幾瓦到幾十萬千(qian)瓦、甚至(zhi)上(shang)百(bai)萬千(qian)瓦。交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)按其功能(neng)通常分為交(jiao)(jiao)流(liu)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)、交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)(ji)和同(tong)(tong)(tong)步(bu)調相(xiang)機(ji)(ji)(ji)(ji)(ji)幾大(da)(da)類。由(you)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)工作(zuo)狀態的(de)(de)(de)可(ke)逆性(xing)，同(tong)(tong)(tong)一臺(tai)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)既可(ke)作(zuo)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)又可(ke)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)(ji)。把電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)分為發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)與電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)(ji)并不很確切，只是有些(xie)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)主要(yao)作(zuo)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)運(yun)行(xing)，有些(xie)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)主要(yao)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)動機(ji)(ji)(ji)(ji)(ji)運(yun)行(xing)。交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)按品(pin)種分有同(tong)(tong)(tong)步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)、異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)兩大(da)(da)類。同(tong)(tong)(tong)步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)轉子的(de)(de)(de)轉速(su)ns與旋轉磁(ci)場的(de)(de)(de)轉速(su)相(xiang)同(tong)(tong)(tong)，稱為同(tong)(tong)(tong)步(bu)轉速(su)。ns與所接交(jiao)(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)頻率（f）、電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)(de)磁(ci)極對數（P）之(zhi)間有嚴格的(de)(de)(de)關系。