CRT 作為一種重(zhong)要(yao)的(de)(de)(de)可控(kong)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)類(lei)型(xing)， 對其(qi)(qi)分類(lei)的(de)(de)(de)研究(jiu)尚無文獻報道(dao)。 近(jin)些年的(de)(de)(de)研究(jiu)主要(yao)集中(zhong)(zhong)在控(kong)制(zhi)繞(rao)(rao)組(zu)的(de)(de)(de)結構形式(shi)(shi)及(ji)控(kong)制(zhi)方式(shi)(shi)的(de)(de)(de)方面(mian)， 筆者根(gen)據控(kong)制(zhi)繞(rao)(rao)組(zu)的(de)(de)(de)結構不(bu)同將 CRT 分為單控(kong)制(zhi)繞(rao)(rao)組(zu)型(xing)、多控(kong)制(zhi)繞(rao)(rao)組(zu)型(xing)、多并聯(lian)支(zhi)路型(xing)、控(kong)制(zhi)繞(rao)(rao)組(zu)分級式(shi)(shi)。串聯(lian)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)也稱(cheng)阻(zu)尼電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)，與電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)組(zu)或密集型(xing)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)相串聯(lian)組(zu)成無功補償裝置，用以限制(zhi)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)(de)合閘涌流(liu)，及(ji)削減(jian)不(bu)裝設(she)串聯(lian)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)時電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)組(zu)對系(xi)統(tong)(tong)諧(xie)(xie)波(bo)的(de)(de)(de)放(fang)(fang)大作用。為了(le)使系(xi)統(tong)(tong)原有(you)諧(xie)(xie)波(bo)不(bu)致因增設(she)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)回路而(er)放(fang)(fang)大，需裝設(she)串聯(lian)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)使電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)回路對諧(xie)(xie)波(bo)呈感(gan)性，降低(di)了(le)母線(xian)上的(de)(de)(de)諧(xie)(xie)波(bo)電(dian)(dian)(dian)(dian)(dian)壓值(zhi)，提高(gao)供電(dian)(dian)(dian)(dian)(dian)質(zhi)量，而(er)且限制(zhi)了(le)高(gao)次(ci)諧(xie)(xie)波(bo)電(dian)(dian)(dian)(dian)(dian)流(liu)流(liu)入電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)組(zu)，抑制(zhi)高(gao)次(ci)諧(xie)(xie)波(bo)，保護電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)(qi)(qi)(qi)。空(kong)心式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)，其(qi)(qi)沒有(you)鐵(tie)心，只有(you)線(xian)圈(quan)，磁路為非導(dao)磁體(ti)。因此(ci)磁阻(zu)很(hen)大，電(dian)(dian)(dian)(dian)(dian)感(gan)值(zhi)很(hen)小(xiao)，且為常數。空(kong)心式(shi)(shi)電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)的(de)(de)(de)結構形式(shi)(shi)多種多樣(yang)。其(qi)(qi)中(zhong)(zhong)，用混(hun)凝土(tu)將繞(rao)(rao)好(hao)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)抗線(xian)圈(quan)澆筑成一個(ge)牢固(gu)的(de)(de)(de)整(zheng)體(ti)被(bei)稱(cheng)為水泥空(kong)心電(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)(qi)(qi)。

鐵(tie)(tie)心(xin)(xin)(xin)式(shi)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)，其結構主(zhu)要是由(you)鐵(tie)(tie)心(xin)(xin)(xin)和線(xian)圈組(zu)成的。由(you)于(yu)鐵(tie)(tie)磁介質(zhi)的導磁率極(ji)高，而且它的磁化曲(qu)線(xian)是非線(xian)性的，所(suo)以(yi)用在鐵(tie)(tie)心(xin)(xin)(xin)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)中的鐵(tie)(tie)心(xin)(xin)(xin)必須帶有(you)氣(qi)隙(xi)。帶氣(qi)隙(xi)的鐵(tie)(tie)心(xin)(xin)(xin)，其磁阻(zu)主(zhu)要取(qu)決于(yu)氣(qi)隙(xi)的尺寸。由(you)于(yu)氣(qi)隙(xi)的磁化特性基(ji)本(ben)上(shang)是線(xian)性的，所(suo)以(yi)鐵(tie)(tie)心(xin)(xin)(xin)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)的電(dian)(dian)感(gan)值不(bu)由(you)外在電(dian)(dian)壓(ya)或電(dian)(dian)流(liu)決定，飽和電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)，而是取(qu)決于(yu)自身線(xian)圈匝數、線(xian)圈和鐵(tie)(tie)心(xin)(xin)(xin)氣(qi)隙(xi)的尺寸。電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)也叫(jiao)電(dian)(dian)感(gan)器(qi)(qi)，一個導體通電(dian)(dian)時(shi)就會在其所(suo)占據的一定空(kong)間范圍產生磁場，所(suo)以(yi)能載流(liu)的電(dian)(dian)導體都(dou)有(you)一般意(yi)義上(shang)的感(gan)性。然而導體的電(dian)(dian)感(gan)較小，所(suo)產生的磁場不(bu)強(qiang)，因此實際(ji)的電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)是導線(xian)繞成螺(luo)線(xian)管(guan)形式(shi)。并且，為了讓這只螺(luo)線(xian)管(guan)具有(you)更大的電(dian)(dian)感(gan)，還(huan)會在螺(luo)線(xian)管(guan)中插入(ru)鐵(tie)(tie)心(xin)(xin)(xin)。有(you)時(shi)為了讓這只螺(luo)線(xian)管(guan)具有(you)更大的電(dian)(dian)感(gan)，便在螺(luo)線(xian)管(guan)中插入(ru)鐵(tie)(tie)心(xin)(xin)(xin)，稱鐵(tie)(tie)心(xin)(xin)(xin)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)。電(dian)(dian)抗(kang)(kang)(kang)分為感(gan)抗(kang)(kang)(kang)和容(rong)抗(kang)(kang)(kang)，比較科學的歸類是感(gan)抗(kang)(kang)(kang)器(qi)(qi)（電(dian)(dian)感(gan)器(qi)(qi)）和容(rong)抗(kang)(kang)(kang)器(qi)(qi)（電(dian)(dian)容(rong)器(qi)(qi)）統稱為電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)。

據(ju)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)生(sheng)產(chan)廠(chang)家介(jie)紹，電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)的(de)(de)(de)外殼會(hui)跟著(zhu)溫度的(de)(de)(de)變化(hua)呈現(xian)脹大或者是(shi)(shi)(shi)縮短的(de)(de)(de)現(xian)象，可是(shi)(shi)(shi)這里邊(bian)還會(hui)呈現(xian)一些故(gu)障，電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)在進行作業(ye)的(de)(de)(de)時分內部呈現(xian)發電(dian)(dian)的(de)(de)(de)現(xian)象，然(ran)后就會(hui)形成箱壁上(shang)面呈現(xian)顯(xian)著(zhu)的(de)(de)(de)變形，呈現(xian)這樣原因的(de)(de)(de)主要(yao)(yao)因素是(shi)(shi)(shi)運(yun)轉的(de)(de)(de)電(dian)(dian)壓過高還有(you)電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)自身的(de)(de)(de)質量就不(bu)過關(guan)形成的(de)(de)(de)。輸(shu)出電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)主要(yao)(yao)應用(yong)(yong)于(yu)工業(ye)自動化(hua)系統工程中(zhong)，特別是(shi)(shi)(shi)使(shi)用(yong)(yong)變頻(pin)器(qi)(qi)(qi)的(de)(de)(de)場合，用(yong)(yong)于(yu)延長變頻(pin)器(qi)(qi)(qi)的(de)(de)(de)有(you)效(xiao)(xiao)傳輸(shu)距離，有(you)效(xiao)(xiao)抑(yi)制變頻(pin)器(qi)(qi)(qi)的(de)(de)(de)IGBT模塊(kuai)開(kai)關(guan)時產(chan)生(sheng)的(de)(de)(de)瞬(shun)間高壓。單(dan)控制繞組型只有(you)一個(ge)(ge)控制繞組 (單(dan)相)，考(kao)慮諧波(bo)(bo)抑(yi)制目(mu)的(de)(de)(de)，增加一個(ge)(ge)第(di)三(san)繞組。 隨(sui)著(zhu)晶(jing)閘管(guan)觸(chu)發角(jiao)的(de)(de)(de)變化(hua)，電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)的(de)(de)(de)功率也隨(sui)之變化(hua)， 由于(yu)晶(jing)閘管(guan)的(de)(de)(de)不(bu)完全導通 ， 將向(xiang)CRT 注入諧波(bo)(bo)。 W3 為諧波(bo)(bo)抑(yi)制繞組，多(duo)個(ge)(ge) LC 濾波(bo)(bo)器(qi)(qi)(qi)與(yu)其并聯(lian)， 用(yong)(yong)來抑(yi)制電(dian)(dian)抗(kang)(kang)(kang)器(qi)(qi)(qi)運(yun)行中(zhong)產(chan)生(sheng)的(de)(de)(de) 3、5、7等各(ge)次諧波(bo)(bo)， 每個(ge)(ge) LC 支(zhi)路對(dui)相應次數的(de)(de)(de)諧波(bo)(bo)產(chan)生(sheng)諧振， 呈現(xian)很低的(de)(de)(de)純電(dian)(dian)阻性阻抗(kang)(kang)(kang)。