步(bu)進電機需(xu)要驅動器嗎？

怎么不(bu)需要啊(a)！沒有驅(qu)動(dong)器(qi)，誰把控制(zhi)器(qi)的(de)(de)控制(zhi)指令變(bian)成脈沖信號驅(qu)動(dong)電(dian)(dian)機轉子運動(dong)呢？和伺(si)服(fu)(fu)電(dian)(dian)機一(yi)樣，步(bu)進(jin)(jin)電(dian)(dian)機的(de)(de)驅(qu)動(dong)器(qi)基本(ben)上也都是(shi)分布式的(de)(de)，即(ji)電(dian)(dian)機是(shi)電(dian)(dian)機，驅(qu)動(dong)器(qi)是(shi)驅(qu)動(dong)器(qi)，二者通(tong)過通(tong)訊(xun)線纜進(jin)(jin)行連接(jie)。不(bu)過，在一(yi)些比較特殊的(de)(de)項目里，我們(men)只有很小的(de)(de)空(kong)間來容納整個步(bu)進(jin)(jin)電(dian)(dian)機系統，步(bu)進(jin)(jin)驅(qu)動(dong)器(qi)，那(nei)傳統的(de)(de)大(da)驅(qu)動(dong)器(qi)就沒處放了。因此，將電(dian)(dian)機與驅(qu)動(dong)器(qi)合為一(yi)體(ti)的(de)(de)整體(ti)式步(bu)進(jin)(jin)電(dian)(dian)機應運而生。我們(men)就開發了相關的(de)(de)設備，而且帶(dai)編碼器(qi)結構，你(ni)可以稱之為一(yi)體(ti)式步(bu)進(jin)(jin)伺(si)服(fu)(fu)。

驅動器組成

步進(jin)驅動(dong)器可分(fen)為(wei)兩部分(fen)一(yi)(yi)部分(fen)是(shi)環形(xing)分(fen)配(pei)器，另一(yi)(yi)部分(fen)是(shi)功率(lv)放大。

環(huan)形分配(pei)器(qi)：要(yao)是(shi)接收3種(zhong)信號分別為：脈沖信號，方(fang)向信號，脫機(ji)(ji)信號。然(ran)(ran)后再(zai)對脈沖信號進(jin)行(xing)分配(pei)，去控制功率放(fang)大器(qi)相應的(de)晶體管導(dao)通，步進(jin)驅動器(qi)價格(ge)，然(ran)(ran)后使步進(jin)電機(ji)(ji)的(de)線圈(quan)得電。從這里我(wo)們(men)可以(yi)看出(chu)，步進(jin)電機(ji)(ji)要(yao)運(yun)轉那么必須要(yao)輸入脈沖，如果沒(mei)有脈沖，步進(jin)電機(ji)(ji)是(shi)不動的(de)，所以(yi)我(wo)們(men)需要(yao)一個驅動器(qi)來(lai)給步進(jin)電機(ji)(ji)的(de)各項繞組依次(ci)通電。

驅動器的細分原理

步進(jin)電機(ji)(ji)驅(qu)動(dong)器(qi)的細分(fen)原理介紹，步進(jin)電機(ji)(ji)安裝有帶長(chang)久磁性的轉(zhuan)子，而定子至(zhi)少具有兩(liang)個繞線(xian)(xian)。當轉(zhuan)子磁性與定子繞線(xian)(xian)保持一致時，步進(jin)驅(qu)動(dong)器(qi)價格(ge)，將驅(qu)動(dong)第二(er)個繞線(xian)(xian)。兩(liang)個繞線(xian)(xian)交替開(kai)啟和關(guan)閉，步進(jin)驅(qu)動(dong)器(qi)公司，這將導致電機(ji)(ji)鎖定在想要的步進(jin)位置。通過(guo)繞線(xian)(xian)的電流方向還可反向。

在(zai)帶有(you)(you)兩個定(ding)子(zi)(zi)繞(rao)線(xian)的(de)步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)中，有(you)(you)四(si)個步(bu)進(jin)(jin)(jin)(jin)以(yi) 90° 隔開(kai)。步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)驅動(dong)器的(de)細分原(yuan)理介紹，根(gen)據向(xiang)定(ding)子(zi)(zi)繞(rao)線(xian)提供的(de)脈沖(chong)，可(ke)準確控(kong)(kong)(kong)(kong)制(zhi)步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)移動(dong)的(de)步(bu)進(jin)(jin)(jin)(jin)。步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)速度控(kong)(kong)(kong)(kong)制(zhi)可(ke)通過向(xiang)繞(rao)線(xian)提供脈沖(chong)頻率實現(xian)，而旋轉(zhuan)(zhuan)方向(xiang)可(ke)通過反向(xiang)脈沖(chong)序(xu)列進(jin)(jin)(jin)(jin)行更(geng)改(gai)。電(dian)(dian)(dian)(dian)機(ji)(ji)內部的(de)極片有(you)(you)許多齒(chi)，有(you)(you)助于定(ding)位相對于定(ding)子(zi)(zi)的(de)轉(zhuan)(zhuan)子(zi)(zi)位置。一些步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)定(ding)子(zi)(zi)級也有(you)(you)齒(chi)。根(gen)據使用的(de)控(kong)(kong)(kong)(kong)制(zhi)技(ji)術，可(ke)全步(bu)進(jin)(jin)(jin)(jin)、半(ban)步(bu)進(jin)(jin)(jin)(jin)或(huo)微步(bu)進(jin)(jin)(jin)(jin)控(kong)(kong)(kong)(kong)制(zhi)步(bu)進(jin)(jin)(jin)(jin)電(dian)(dian)(dian)(dian)機(ji)(ji)。簡(jian)單的(de)方形(xing)脈沖(chong)可(ke)以(yi)控(kong)(kong)(kong)(kong)制(zhi)處于全步(bu)進(jin)(jin)(jin)(jin)的(de)電(dian)(dian)(dian)(dian)機(ji)(ji)，而控(kong)(kong)(kong)(kong)制(zhi)技(ji)術（如(ru)脈寬調(diao)制(zhi) （PWM））可(ke)用于微步(bu)進(jin)(jin)(jin)(jin)。