永(yong)磁(ci)(ci)(ci)(ci)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)是用(yong)永(yong)磁(ci)(ci)(ci)(ci)體(ti)建立磁(ci)(ci)(ci)(ci)場(chang)的(de)(de)一種(zhong)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji),有無電(dian)(dian)(dian)(dian)刷(shua)(shua)可分為永(yong)磁(ci)(ci)(ci)(ci)無刷(shua)(shua)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)和(he)永(yong)磁(ci)(ci)(ci)(ci)有刷(shua)(shua)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)。永(yong)磁(ci)(ci)(ci)(ci)無刷(shua)(shua)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)動機(ji)(ji)是由一塊(kuai)或多塊(kuai)永(yong)磁(ci)(ci)(ci)(ci)體(ti)建立磁(ci)(ci)(ci)(ci)場(chang)的(de)(de)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)動機(ji)(ji),其性能(neng)與(yu)恒定勵(li)磁(ci)(ci)(ci)(ci)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)他(ta)勵(li)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)動機(ji)(ji)相似,可以由改變(bian)電(dian)(dian)(dian)(dian)樞電(dian)(dian)(dian)(dian)壓來方便地調速(su);有刷(shua)(shua)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)定子上安裝有固定的(de)(de)主磁(ci)(ci)(ci)(ci)極和(he)電(dian)(dian)(dian)(dian)刷(shua)(shua),轉子上安裝有電(dian)(dian)(dian)(dian)樞繞組和(he)換向器。直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源的(de)(de)電(dian)(dian)(dian)(dian)能(neng)通(tong)過電(dian)(dian)(dian)(dian)刷(shua)(shua)和(he)換向器進入電(dian)(dian)(dian)(dian)樞繞組,產生(sheng)電(dian)(dian)(dian)(dian)樞電(dian)(dian)(dian)(dian)流(liu)(liu)(liu),電(dian)(dian)(dian)(dian)樞電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)產生(sheng)的(de)(de)磁(ci)(ci)(ci)(ci)場(chang)與(yu)主磁(ci)(ci)(ci)(ci)場(chang)相互作用(yong)產生(sheng)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)轉矩,使電(dian)(dian)(dian)(dian)機(ji)(ji)旋轉帶動負載。隨著市場(chang)的(de)(de)發(fa)展,永(yong)磁(ci)(ci)(ci)(ci)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)應用(yong)會更多,原先(xian)用(yong)交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)許(xu)多場(chang)合均被永(yong)磁(ci)(ci)(ci)(ci)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)所替(ti)代。特(te)別是出現(xian)永(yong)磁(ci)(ci)(ci)(ci)無刷(shua)(shua)電(dian)(dian)(dian)(dian)機(ji)(ji)后(hou),永(yong)磁(ci)(ci)(ci)(ci)直(zhi)(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)生(sheng)產數量在(zai)不斷地上升。
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