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與低壓電機相比，高壓電機有哪些優缺點

文章出處：maituwangluo.com  |  發布時間：2024/4/27 15:33:48  |  瀏覽次數：0
  隨著高效節能(neng)自動化社會(hui)的不斷發展，直流(liu)調(diao)(diao)速器作為(wei)一種(zhong)高效節能(neng)的電機(ji)調(diao)(diao)速裝置，得(de)到了廣(guang)泛的應(ying)(ying)用(yong)(yong)，性(xing)(xing)價比相對較高，進一步提高了應(ying)(ying)用(yong)(yong)的廣(guang)泛性(xing)(xing)和重(zhong)要(yao)性(xing)(xing)。因此(ci)，維(wei)護是必不可少的。下面(mian)的工程師(shi)將(jiang)與您(nin)分享哪些項目應(ying)(ying)該(gai)定(ding)期檢查直流(liu)調(diao)(diao)速器的維(wei)護，以確保直流(liu)調(diao)(diao)速器的正常(chang)使用(yong)(yong)。
  DC調(diao)速(su)器(qi)維護檢(jian)(jian)查分(fen)為日常和定(ding)期(qi)檢(jian)(jian)查，定(ding)期(qi)檢(jian)(jian)查，檢(jian)(jian)查前切(qie)斷(duan)電(dian)源，確保調(diao)速(su)器(qi)處于停(ting)電(dian)狀態，停(ting)止(zhi)運(yun)行拆卸變頻器(qi)外(wai)殼，檢(jian)(jian)查，但也要注意變頻器(qi)主電(dian)路仍(reng)有(you)高電(dian)壓(ya)，先(xian)停(ting)留(liu)一點時間，確定(ding)無電(dian)壓(ya)檢(jian)(jian)查項目(mu)。
  首先，檢查(cha)(cha)DC調速器(qi)使用的周圍環境是(shi)(shi)否符合(he)要(yao)求和規范。其次，檢查(cha)(cha)變(bian)頻器(qi)控制電(dian)路是(shi)(shi)否正常，顯示面板是(shi)(shi)否損壞(huai)，框架結(jie)構(gou)是(shi)(shi)否緊(jin)密，導(dao)線是(shi)(shi)否損壞(huai)，濾波電(dian)容(rong)器(qi)是(shi)(shi)否泄漏(lou)。這些都是(shi)(shi)需要(yao)檢查(cha)(cha)的項目，但這里(li)還有(you)其他一些項目。
  與低(di)壓(ya)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)相比，高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)有(you)哪些(xie)優缺點(dian):額定(ding)電(dian)(dian)(dian)(dian)(dian)壓(ya)不(bu)同，啟動和工作電(dian)(dian)(dian)(dian)(dian)流(liu)不(bu)同，電(dian)(dian)(dian)(dian)(dian)壓(ya)越高(gao)，電(dian)(dian)(dian)(dian)(dian)流(liu)越小；電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的絕緣和耐壓(ya)性不(bu)同，電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)繞組的導(dao)線也不(bu)同。對于功率相同的電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)，高(gao)壓(ya)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的導(dao)線比低(di)壓(ya)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)少(shao)，使用的電(dian)(dian)(dian)(dian)(dian)纜也不(bu)同。
  優點
  (1)高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)可以(yi)(yi)做大(da)(da)功(gong)率(lv)，可以(yi)(yi)達到幾(ji)千甚(shen)至幾(ji)萬千瓦。這是因為在相同的(de)(de)輸出功(gong)率(lv)下，高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)電(dian)(dian)(dian)流遠(yuan)小于(yu)低壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(基本(ben)上與電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)成反比)，比如500kW、4極電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)額(e)定(ding)電(dian)(dian)(dian)流，當(dang)額(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)為380V時(shi)，約為900A，而(er)當(dang)額(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)為10kV時(shi)，只(zhi)有30A左右(you)。因此(ci)，高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)繞組(zu)可以(yi)(yi)使(shi)用(yong)(yong)較(jiao)小的(de)(de)線徑(jing)。因此(ci)，高(gao)(gao)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)定(ding)子(zi)銅損耗將低于(yu)低壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)。對于(yu)大(da)(da)功(gong)率(lv)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)，使(shi)用(yong)(yong)低壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)時(shi)，由于(yu)需(xu)(xu)要(yao)較(jiao)厚的(de)(de)導(dao)線，需(xu)(xu)要(yao)大(da)(da)面積的(de)(de)定(ding)子(zi)槽，使(shi)定(ding)子(zi)芯直(zhi)徑(jing)大(da)(da)，電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)整體體積大(da)(da)。
  （2）對(dui)于容量大(da)的電(dian)機，高(gao)壓電(dian)機使用(yong)(yong)的電(dian)源(yuan)和配電(dian)設備(bei)比低壓電(dian)機整體投資(zi)少(shao)，線路損耗小，可(ke)節省一定的功耗。特別是10kV高(gao)壓電(dian)機可(ke)直接使用(yong)(yong)網絡電(dian)源(yuan)（中國提供(gong)給(gei)用(yong)(yong)戶的高(gao)壓電(dian)力一般(ban)為10kV），因此(ci)對(dui)電(dian)源(yuan)設備(bei)（主要是變壓器）的投資(zi)較少(shao)，使用(yong)(yong)方便，故障率較低。
  缺點：
  （1）繞(rao)組成本(ben)相對(dui)較(jiao)高（主要由絕(jue)緣引起(qi)），相關絕(jue)緣材料成本(ben)也較(jiao)高。
  (2)絕緣處理工藝難度(du)大，工時成(cheng)本高。
  (3)對使用環境的要(yao)求(qiu)比低壓電(dian)機嚴格得多(duo)。
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