SEW 伺服驅(qū)動器 MAS51A060-503-00

SEW 伺服驅(qū)動器 MAS51A060-503-00   

1、伺服系統(tǒng)（servo mechanism）是使物的位置、方位、狀態(tài)等輸出被控量能夠跟隨輸入目標（或給定值）的任意變化的自動控制系統(tǒng)。伺服主要靠沖來--，基本上可以這樣解，伺服電機接收到1個沖，會旋轉(zhuǎn)1個沖對應(yīng)的角度，從而實現(xiàn)位移，因為，伺服電機本身具備發(fā)出沖的能，所以伺服電機每旋轉(zhuǎn)個角度，都會發(fā)出對應(yīng)數(shù)量的沖，這樣，和伺服電機接受的沖形成了呼應(yīng)，或者叫閉環(huán)，如此來，系統(tǒng)會知道發(fā)了多少沖給伺服電機，同時又收了多少沖回來，這樣，能夠很--的控制電機的轉(zhuǎn)動，從而實現(xiàn)--的--，可以達到0.001mm。直流伺服電機分為有刷和無刷電機。有刷電機成本低，結(jié)構(gòu)簡，啟動轉(zhuǎn)矩大，調(diào)速范圍寬，控制容易，需要維，但維不方便（換碳刷），產(chǎn)生電磁干擾，對環(huán)境有要求。因此它可以用于對成本敏感的普通工業(yè)和用場合。 無刷電機積小，重量輕，出力大，響應(yīng)快，速度高，慣量小，轉(zhuǎn)動平滑，力矩穩(wěn)定。控制雜，容易實現(xiàn)智能化，其電子換相方式靈活，可以方波換相或正弦波換相。電機維，率很高，運行溫度低，電磁很小，長壽，可用于各種環(huán)境。 2、交流伺服電機也是無刷電機，分為同步和異步電機，運動控制中般都用同步電機，它的率范圍大，可以做到很大的率。大慣量，高轉(zhuǎn)動速度低，且隨著率增大而快速低。因而適合做低速平穩(wěn)運行的應(yīng)用。 3、伺服電機內(nèi)部的轉(zhuǎn)子是永磁鐵，驅(qū)動器控制的U/V/W三相電形成電磁場，轉(zhuǎn)子在此磁場的作用下轉(zhuǎn)動，同時電機自帶的編碼器反饋信號給驅(qū)動器，驅(qū)動器根據(jù)反饋值與目標值進行比較，調(diào)整轉(zhuǎn)子轉(zhuǎn)動的角度。伺服電機的精度決定于編碼器的精度（線數(shù)）。 交流伺服電機和無刷直流伺服電機在能上的區(qū)別：交流伺服要好些，因為是正弦波控制，轉(zhuǎn)矩動小。直流伺服是梯形波。但直流伺服比較簡，便。

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