輸(shu)出(chu)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)亦稱(cheng)馬達電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)，它的(de)(de)(de)(de)(de)作用是(shi)(shi)限(xian)制(zhi)電(dian)(dian)(dian)(dian)機連接(jie)電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)(de)(de)容(rong)(rong)性充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流及(ji)使電(dian)(dian)(dian)(dian)機繞(rao)組上(shang)(shang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)上(shang)(shang)升率限(xian)制(zhi)在(zai)(zai)54OV/us以內，一(yi)(yi)般功率為4-90KW變頻器(qi)(qi)與電(dian)(dian)(dian)(dian)機間的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)纜(lan)長(chang)度超過50m時，應設置輸(shu)出(chu)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)，它還(huan)用于鈍(dun)化變頻器(qi)(qi)輸(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(開關(guan)的(de)(de)(de)(de)(de)陡度)，減少(shao)對逆(ni)變器(qi)(qi)中(zhong)的(de)(de)(de)(de)(de)元件(如IGBT)的(de)(de)(de)(de)(de)擾動和沖擊(ji)。一(yi)(yi)個(ge)導體(ti)通電(dian)(dian)(dian)(dian)時就會(hui)在(zai)(zai)其所(suo)占據的(de)(de)(de)(de)(de)一(yi)(yi)定空間范圍產生(sheng)磁場，所(suo)以所(suo)有(you)(you)能載流的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)導體(ti)都有(you)(you)一(yi)(yi)般意義(yi)上(shang)(shang)的(de)(de)(de)(de)(de)感(gan)性。然而(er)通電(dian)(dian)(dian)(dian)長(chang)直導體(ti)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)感(gan)較小，所(suo)產生(sheng)的(de)(de)(de)(de)(de)磁場不(bu)強(qiang)，因此實際的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)是(shi)(shi)導線繞(rao)成螺線管形式，稱(cheng)空心電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)。電(dian)(dian)(dian)(dian)力系統中(zhong)所(suo)采取的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)常見的(de)(de)(de)(de)(de)有(you)(you)串聯(lian)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)和并聯(lian)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)。串聯(lian)電(dian)(dian)(dian)(dian)抗(kang)器(qi)(qi)主(zhu)要用來(lai)限(xian)制(zhi)短路電(dian)(dian)(dian)(dian)流，也有(you)(you)在(zai)(zai)濾(lv)波器(qi)(qi)中(zhong)與電(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)串聯(lian)或并聯(lian)用來(lai)限(xian)制(zhi)電(dian)(dian)(dian)(dian)網中(zhong)的(de)(de)(de)(de)(de)高次諧(xie)波。

電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)的(de)(de)(de)線圈和(he)鐵(tie)芯(xin)組裝成一(yi)體(ti)后經過預烘一(yi)真空浸漆(qi)→熱烘固化這(zhe)一(yi)工(gong)藝流(liu)程，采用+級(ji)浸漬漆(qi)，使電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)的(de)(de)(de)線圈和(he)鐵(tie)芯(xin)牢固地(di)結(jie)合(he)在一(yi)起，不但大大減小(xiao)了(le)運行時的(de)(de)(de)噪音。而且具有(you)極(ji)高的(de)(de)(de)耐熱等級(ji)，輸出電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)，可(ke)確(que)保電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)在高溫下(xia)亦能安全地(di)無(wu)噪音地(di)運行。輸入(ru)電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)的(de)(de)(de)作用是限制(zhi)變流(liu)器(qi)換相(xiang)時電(dian)(dian)(dian)(dian)網(wang)側的(de)(de)(de)電(dian)(dian)(dian)(dian)壓降(jiang)；抑(yi)制(zhi)諧(xie)波(bo)以及并聯(lian)變流(liu)器(qi)組的(de)(de)(de)解耦(ou)；限制(zhi)電(dian)(dian)(dian)(dian)網(wang)電(dian)(dian)(dian)(dian)壓的(de)(de)(de)跳躍或電(dian)(dian)(dian)(dian)網(wang)系統操作時所(suo)產生的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)沖擊。當電(dian)(dian)(dian)(dian)網(wang)短路容量(liang)與變流(liu)器(qi)變頻(pin)器(qi)容量(liang)比大于33:1時，輸入(ru)電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)的(de)(de)(de)相(xiang)對電(dian)(dian)(dian)(dian)壓降(jiang)，對單象限工(gong)作為(wei)2%，四象限為(wei)4%。有(you)時為(wei)了(le)讓這(zhe)只螺線管(guan)具有(you)更(geng)大的(de)(de)(de)電(dian)(dian)(dian)(dian)感，便在螺線管(guan)中插入(ru)鐵(tie)心，稱鐵(tie)心電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)。電(dian)(dian)(dian)(dian)抗(kang)(kang)分為(wei)感抗(kang)(kang)和(he)容抗(kang)(kang)，比較(jiao)科學的(de)(de)(de)歸類是感抗(kang)(kang)器(qi)（電(dian)(dian)(dian)(dian)感器(qi)）和(he)容抗(kang)(kang)器(qi)（電(dian)(dian)(dian)(dian)容器(qi)）統稱為(wei)電(dian)(dian)(dian)(dian)抗(kang)(kang)器(qi)。

輸出電(dian)抗(kang)(kang)器(qi)主要應(ying)用(yong)于工業自(zi)動化系統(tong)工程中，特別是(shi)使用(yong)變(bian)(bian)頻(pin)器(qi)的(de)(de)(de)(de)(de)(de)場(chang)合，用(yong)于延長變(bian)(bian)頻(pin)器(qi)的(de)(de)(de)(de)(de)(de)有效傳輸距離，有效抑制(zhi)(zhi)變(bian)(bian)頻(pin)器(qi)的(de)(de)(de)(de)(de)(de)IGBT模塊開關(guan)時(shi)產生(sheng)的(de)(de)(de)(de)(de)(de)瞬間高(gao)壓。一(yi)個導體(ti)通(tong)電(dian)時(shi)就(jiu)會在其(qi)所(suo)占據的(de)(de)(de)(de)(de)(de)一(yi)定(ding)空(kong)間范圍產生(sheng)磁(ci)(ci)(ci)場(chang)，所(suo)以所(suo)有能(neng)(neng)載(zai)流(liu)的(de)(de)(de)(de)(de)(de)電(dian)導體(ti)都有一(yi)般意(yi)義上的(de)(de)(de)(de)(de)(de)感(gan)(gan)性。然而通(tong)電(dian)長直導體(ti)的(de)(de)(de)(de)(de)(de)電(dian)感(gan)(gan)較(jiao)(jiao)小(xiao)，所(suo)產生(sheng)的(de)(de)(de)(de)(de)(de)磁(ci)(ci)(ci)場(chang)不強(qiang)，因此實際的(de)(de)(de)(de)(de)(de)電(dian)抗(kang)(kang)器(qi)是(shi)導線繞成螺線管形式，稱空(kong)心(xin)電(dian)抗(kang)(kang)器(qi)。電(dian)抗(kang)(kang)器(qi)在額(e)定(ding)負載(zai)下長期正(zheng)常(chang)運(yun)行(xing)的(de)(de)(de)(de)(de)(de)時(shi)間，就(jiu)是(shi)電(dian)抗(kang)(kang)器(qi)的(de)(de)(de)(de)(de)(de)使用(yong)壽命(ming)(ming)。電(dian)抗(kang)(kang)器(qi)使用(yong)壽命(ming)(ming)由制(zhi)(zhi)造它的(de)(de)(de)(de)(de)(de)材(cai)(cai)料(liao)所(suo)決定(ding)。制(zhi)(zhi)造電(dian)抗(kang)(kang)器(qi)的(de)(de)(de)(de)(de)(de)材(cai)(cai)料(liao)有金(jin)屬材(cai)(cai)料(liao)和(he)絕緣材(cai)(cai)料(liao)兩(liang)大類(lei)。金(jin)屬材(cai)(cai)料(liao)耐高(gao)溫(wen)，而絕緣材(cai)(cai)料(liao)長期在較(jiao)(jiao)高(gao)的(de)(de)(de)(de)(de)(de)溫(wen)度、電(dian)場(chang)和(he)磁(ci)(ci)(ci)場(chang)作用(yong)下，會逐漸(jian)失去原有的(de)(de)(de)(de)(de)(de)力學性能(neng)(neng)和(he)絕緣性能(neng)(neng)，例如變(bian)(bian)脆、機(ji)械強(qiang)度減弱、穿。這個漸(jian)變(bian)(bian)的(de)(de)(de)(de)(de)(de)過程就(jiu)是(shi)絕緣材(cai)(cai)料(liao)的(de)(de)(de)(de)(de)(de)老化。