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只是(shi)由于(yu)無(wu)(wu)(wu)刷(shua)直(zhi)(zhi)流采(cai)用了(le)電(dian)(dian)(dian)子(zi)換(huan)向，所以(yi)(yi)要有(you)數字控(kong)制(zhi)才可(ke)(ke)(ke)以(yi)(yi)實現(xian)了(le)，而有(you)刷(shua)直(zhi)(zhi)流是(shi)通(tong)(tong)過(guo)(guo)碳刷(shua)換(huan)向的(de)(de)，利用可(ke)(ke)(ke)控(kong)硅(gui)等傳統(tong)模擬電(dian)(dian)(dian)路(lu)都可(ke)(ke)(ke)以(yi)(yi)控(kong)制(zhi)，比較(jiao)(jiao)簡單(dan)。 三、性(xing)能(neng)差異(yi)上的(de)(de)區別： 1、有(you)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)結構簡單(dan)、開發時(shi)(shi)間久(jiu)、技術成熟： 早(zao)在十九紀誕生(sheng)電(dian)(dian)(dian)機(ji)(ji)(ji)的(de)(de)時(shi)(shi)候，產(chan)生(sheng)的(de)(de)實用性(xing)電(dian)(dian)(dian)機(ji)(ji)(ji)就是(shi)無(wu)(wu)(wu)刷(shua)形式，即(ji)交流鼠(shu)籠式異(yi)步(bu)電(dian)(dian)(dian)動機(ji)(ji)(ji)，這(zhe)種電(dian)(dian)(dian)動機(ji)(ji)(ji)在交流電(dian)(dian)(dian)產(chan)生(sheng)以(yi)(yi)后得到了(le)廣泛的(de)(de)應(ying)用。但是(shi)，異(yi)步(bu)電(dian)(dian)(dian)動機(ji)(ji)(ji)有(you)許多無(wu)(wu)(wu)法克服的(de)(de)缺陷，以(yi)(yi)致電(dian)(dian)(dian)機(ji)(ji)(ji)技術發展緩(huan)慢。 2、直(zhi)(zhi)流有(you)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)響(xiang)應(ying)速(su)度快，起(qi)(qi)(qi)(qi)動扭矩大： 直(zhi)(zhi)流有(you)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)起(qi)(qi)(qi)(qi)動響(xiang)應(ying)速(su)度快，起(qi)(qi)(qi)(qi)動扭矩大，變速(su)平(ping)穩，速(su)度從零到 幾乎感覺不到振動，起(qi)(qi)(qi)(qi)動時(shi)(shi)可(ke)(ke)(ke)帶(dai)動更大的(de)(de)負荷(he)。無(wu)(wu)(wu)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)起(qi)(qi)(qi)(qi)動電(dian)(dian)(dian)阻大（感抗(kang)），所以(yi)(yi)功(gong)率(lv)因素小，起(qi)(qi)(qi)(qi)動扭矩相對較(jiao)(jiao)小，起(qi)(qi)(qi)(qi)動時(shi)(shi)有(you)嗡嗡聲，并伴隨(sui)著強烈震動，起(qi)(qi)(qi)(qi)動時(shi)(shi)帶(dai)動負荷(he)較(jiao)(jiao)小。 3、直(zhi)(zhi)流有(you)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)運行平(ping)穩，起(qi)(qi)(qi)(qi)、制(zhi)動效果好(hao)： 有(you)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)是(shi)通(tong)(tong)過(guo)(guo)調(diao)(diao)壓調(diao)(diao)速(su)，所以(yi)(yi)起(qi)(qi)(qi)(qi)動和制(zhi)動平(ping)穩，恒速(su)運行時(shi)(shi)也平(ping)穩。無(wu)(wu)(wu)刷(shua)電(dian)(dian)(dian)機(ji)(ji)(ji)通(tong)(tong)常是(shi)數字變頻控(kong)制(zhi)，先將交流變成直(zhi)(zhi)流，直(zhi)(zhi)