dd馬達運用(yong)外轉(zhuan)(zhuan)子(zi)結構，不同之(zhi)處(chu)交流伺服運用(yong)內轉(zhuan)(zhuan)子(zi)結構。電(dian)機(ji)內部磁極數也比較(jiao)大，導致啟動轉(zhuan)(zhuan)矩和旋轉(zhuan)(zhuan)轉(zhuan)(zhuan)矩較(jiao)大。電(dian)機(ji)使用(yong)的(de)徑向軸(zhou)承能承受較(jiao)大的(de)軸(zhou)向力。

　　該編碼器(qi)是一(yi)種(zhong)高分辨率的圓形光(guang)柵(zha)。dd直(zhi)接驅動電(dian)機(ji)具有(you)原點和極限輸出的圓光(guang)柵(zha)分辨率為2097152ppR.由(you)于高精(jing)度(du)(du)的測量(liang)反饋和高水平(ping)的制(zhi)(zhi)造(zao)(zao)工(gong)藝(yi)，直(zhi)線電(dian)機(ji)模組(zu)DD電(dian)機(ji)的定(ding)位精(jing)度(du)(du)可(ke)以達(da)到第二級。（如DME5A系列絕對精(jing)度(du)(du)為±25弧秒，重復定(ding)位精(jing)度(du)(du)為±1弧秒）Dd馬達(da)適用(yong)(yong)于各(ge)種(zhong)工(gong)業(ye)設(she)(she)(she)備機(ji)械，特別是半(ban)導體制(zhi)(zhi)造(zao)(zao)、檢測設(she)(she)(she)備和液(ye)晶制(zhi)(zhi)造(zao)(zao)設(she)(she)(she)備。例如：數控機(ji)床加工(gong)中心、3C制(zhi)(zhi)造(zao)(zao)行業(ye)、直(zhi)線電(dian)機(ji)模組(zu)醫療設(she)(she)(she)備、制(zhi)(zhi)藥行業(ye)、半(ban)導體直(zhi)線電(dian)機(ji)模組(zu)制(zhi)(zhi)造(zao)(zao)、工(gong)業(ye)機(ji)器(qi)人、液(ye)晶面板設(she)(she)(she)備、激光(guang)制(zhi)(zhi)造(zao)(zao)設(she)(she)(she)備等(deng)領域都有(you)應用(yong)(yong)。

　　直(zhi)(zhi)線(xian)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)模組(zu)DD馬達不同之(zhi)處普通(tong)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)，它運用(yong)內部轉(zhuan)子結(jie)構(gou)。該(gai)編碼器是一種高(gao)分(fen)辨率光電(dian)(dian)(dian)(dian)(dian)編碼器。Dd直(zhi)(zhi)驅電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)有原點。由(you)于(yu)(yu)高(gao)水平的制造工(gong)藝保(bao)(bao)證和(he)(he)高(gao)精度(du)(du)的測量反饋，電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的定位精度(du)(du)可以達到(dao)第(di)二級。DDM通(tong)常(chang)具(ju)有混合(he)(he)結(jie)構(gou)。定子由(you)釹(nv)鐵硼和(he)(he)永(yong)磁(ci)(ci)(ci)線(xian)圈繞組(zu)組(zu)成。由(you)磁(ci)(ci)(ci)鐵產生(sheng)的永(yong)磁(ci)(ci)(ci)磁(ci)(ci)(ci)場回路和(he)(he)勵磁(ci)(ci)(ci)磁(ci)(ci)(ci)場回路產生(sheng)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)力，電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)力在線(xian)圈通(tong)電(dian)(dian)(dian)(dian)(dian)后(hou)作(zuo)用(yong)于(yu)(yu)齒輪間隙，使(shi)直(zhi)(zhi)線(xian)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的DD電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)模組(zu)，沿組(zu)合(he)(he)方向旋轉(zhuan)。與步(bu)進電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)相比(bi)，DD電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)在材(cai)質和(he)(he)精度(du)(du)上都有極(ji)高(gao)的要求。扭矩和(he)(he)速度(du)(du)特性也非常(chang)相似，保(bao)(bao)持(chi)高(gao)扭矩和(he)(he)操作(zuo)扭矩隨速度(du)(du)的增加而(er)減(jian)小。