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西門子伺服驅(qū)動器接地應(yīng)該注意哪些事項
信息來源： 發(fā)布時間：2013-08-19 09:12:01 點擊次數(shù)：0
西門子伺服驅(qū)動器接地應(yīng)該注意哪些事項?西門子伺服驅(qū)動器接地注意事項：
1、保持命令參考電壓的恒定，要將西門子伺服驅(qū)動器的信號地接到控制器的信號地。 假如接到外部電源的接地上，容易影響控制器和驅(qū)動器的工作。
2、屏蔽層接地是比較困難的，有幾種方法。正確的屏蔽接地處是在其電路內(nèi)部的參考電位點上。這個點取決于噪聲源和接收是否同時接地，或者浮空。要確保屏蔽層在同一個點接地使得地電流不會流過屏蔽層。
3、在西門子伺服系統(tǒng)中，所有的公共地和大地在信號端是接在一起的。多種連接大地方式產(chǎn)生的地回路很容易受噪音影響而在不同的參考點上產(chǎn)生流。
4、如果在交流電源和西門子驅(qū)動器直流總線(如變壓器)之間沒有隔離的話，不要將直流總線的非隔離端口或非隔離信號的地接大地，這可能會導(dǎo)致設(shè)備損壞和人員傷害。因為交流的公共電壓并不是對大地的，在直流總線地和大地之間可能會有很高的電壓。
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