五、電動機運行時響聲不正常有異響
故障原因①軸承磨損或油內有砂粒等異物；②轉子鐵芯松動；③軸承缺油；④電源電壓過高或不平衡。
故障排除①更換軸承或清洗軸承；②檢修轉子鐵芯；③加油；④檢查并調整電源電壓。
六、運行中電動機振動較大
故障原因①由于磨損軸承間隙過大；②氣隙不均勻；③轉子不平衡；④轉軸彎曲；⑤聯軸器（皮帶輪）同軸度過低。
故障排除①檢修軸承，必要時更換；②調整氣隙，使之均勻；③校正轉子動平衡；④校直轉軸；⑤重新校正，使之符合規定。
新聞:崇川區ATM機用步進馬達57HS51手冊
交流伺服電機也是無刷電機，分為同步和異步電機，目前運動控制中一般都用同步電機，它的功率范圍大，可以做到很大的功率。大慣量，轉動速度低，且隨著功率增大而快速降低。因而適合做低速平穩運行的應用。
使用電機時要注意的問題？
答：上電運行前要作如下檢查：
1） 電源電壓是否合適（過壓很可能造成驅動模塊的損壞）；對于直流輸入的 +/- 極性一定不能接錯，驅動控制器上的電機型號或電流設定值是否合適（開始時不要太大）；
2） 控制信號線接牢靠，工業現場要考慮屏蔽問題（如采用雙絞線）；
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一般常用的有溶劑清洗法、化學處理清潔法和機械清潔法。表面干燥清洗干凈后可用過濾的干燥壓縮空氣吹干，或者用12~17℃的干燥器進行干燥，也可用干凈紗布擦干。涂敷防銹油的方法1）浸泡法：一些小軸承采用浸泡在防銹油脂中，讓其表面粘附上一層防銹油脂的方法。油膜厚度可通過控制防銹油脂的溫度或粘度來達到。刷涂法用于不適用浸泡或噴涂的室外建筑設備或特殊形狀的制品，刷涂時既要注意不產生堆積，也要注意防止漏涂。
新聞:崇川區ATM機用步進馬達57HS51手冊
1,直流他勵電動機:
勵磁繞組與電樞沒有電的聯系，勵磁電路是由另外直流電源供給的。因此勵磁電流不受電樞端電壓或電樞電流的影響。
2,直流并勵電動機:
并勵繞組兩端電壓就是電樞兩端電壓，但是勵磁繞組用細導線繞成，其匝數很多，因此具有較大的電阻，使得通過他的勵磁電流較小。
3,直流串勵電動機：
勵磁繞組是和電樞串聯的，所以這種電動機內磁場隨著電樞電流的改變有顯著的變化。為了使勵磁繞組中不致引起大的損耗和電壓降，勵磁繞組的電阻越小越好，所以直流串勵電動機通常用較粗的導線繞成，他的匝數較少。
4,直流復勵電動機：
電動機的磁通由兩個繞組內的勵磁電流產生。
新聞:崇川區ATM機用步進馬達57HS51手冊
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新聞:崇川區ATM機用步進馬達57HS51手冊
