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使用常識

子昂機電分享伺服電機維修方法

來源:子昂電機維修 日期:2018-01-03 11:56:22

  先簡單的介紹一下什么是伺服電機:伺服電機是指在伺服系統中控制機械元件運轉的發動機,是一種補助馬達間接變速裝置,可使控制速度,位置精度非常準確,可以將電壓信號轉化為轉矩和轉速以驅動控制對象。伺服電機因為長期不斷使用或者使用操作不當,會經常發生電機故障,維修比較復雜。接下來就是子昂機電收集了一些伺服電機發生常見故障問題的電機維修方法(fa),供(gong)大(da)家學習(xi)借鑒。


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  一(yi)、起動(dong)伺服(fu)電機前需做的工作(zuo)有哪些(xie)

  1、測量絕緣(yuan)電(dian)阻(對低電(dian)壓電(dian)機不應低于0.5M)。

  2、測量電(dian)(dian)源電(dian)(dian)壓,檢查電(dian)(dian)機接線是(shi)否(fou)正確(que),電(dian)(dian)源電(dian)(dian)壓是(shi)否(fou)符合要求。

  3、檢查起(qi)動設(she)備是否良好。

  4、檢查熔斷(duan)器(qi)是否合適。

  5、檢查電機接地、接零是否良(liang)好。

  6、檢查(cha)傳動裝置是否有缺陷。

  7、檢查電機(ji)環境是否合適,清除易燃品和(he)其它雜物(wu)。

  二、伺服電機維修竄動現象

  在(zai)進給時出現竄(cuan)動(dong)現象(xiang),測速信號(hao)不穩(wen)定,如編碼(ma)器有裂(lie)紋;接線端(duan)子接觸(chu)不良,如螺釘松(song)動(dong)等(deng);當竄(cuan)動(dong)發生在(zai)由(you)(you)正方向運動(dong)與反(fan)方向運動(dong)的換向瞬間時,一般是由(you)(you)于進給傳動(dong)鏈的反(fan)向問隙或伺(si)服驅動(dong)增益過大所致。

  三、伺服(fu)電機維修振動現象

  機(ji)床(chuang)高速運行時(shi),可能產(chan)生(sheng)振動(dong),這時(shi)就會產(chan)生(sheng)過(guo)流(liu)報警(jing)。機(ji)床(chuang)振動(dong)問題(ti)一般(ban)屬(shu)于速度(du)問題(ti),所以(yi)應尋找速度(du)環(huan)問題(ti)。

  四、伺服(fu)電機維(wei)修(xiu)轉(zhuan)矩降低現象(xiang)

  伺服電(dian)機(ji)從額定堵轉轉矩(ju)到高速運(yun)轉時(shi)(shi)(shi),發(fa)現(xian)轉矩(ju)會突然降低,這時(shi)(shi)(shi)因為電(dian)動機(ji)繞(rao)組的散熱損壞和(he)機(ji)械部分發(fa)熱引起的。高速時(shi)(shi)(shi),電(dian)動機(ji)溫(wen)升變大,因此,正確使(shi)用伺服電(dian)機(ji)前一定要對電(dian)機(ji)的負載進(jin)行(xing)驗算。


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  五(wu)、伺(si)服電(dian)機三相電(dian)流不平衡的(de)原因是什(shen)么

  1、三相電壓(ya)不平衡。

  2、電機內部某相支路焊(han)接(jie)不良或(huo)接(jie)觸(chu)不好。

  3、電機繞阻匝間(jian)短路(lu)或(huo)對地相間(jian)短路(lu)。

  4、接線錯誤。

  六、怎么(me)控制伺服(fu)電機速(su)度(du)快慢

  伺服電(dian)(dian)機(ji)是一(yi)個典(dian)型閉環(huan)反(fan)(fan)饋系統(tong),減速齒輪(lun)組由(you)電(dian)(dian)機(ji)驅動(dong),其終端(duan)(輸(shu)出(chu)端(duan))帶動(dong)一(yi)個線性的比例(li)電(dian)(dian)位(wei)器(qi)作位(wei)置檢測,該電(dian)(dian)位(wei)器(qi)把(ba)轉(zhuan)角(jiao)坐標(biao)轉(zhuan)換為一(yi)比例(li)電(dian)(dian)壓反(fan)(fan)饋給控制線路板(ban)(ban),控制線路板(ban)(ban)將其與輸(shu)入的控制脈(mo)沖(chong)信號比較(jiao),產生糾(jiu)正脈(mo)沖(chong),并(bing)驅動(dong)電(dian)(dian)機(ji)正向或反(fan)(fan)向地(di)轉(zhuan)動(dong),使齒輪(lun)組的輸(shu)出(chu)位(wei)置與期望值相符,令糾(jiu)正脈(mo)沖(chong)趨(qu)于為0,從(cong)而達到(dao)使伺服電(dian)(dian)機(ji)精確定(ding)位(wei)與定(ding)速的目的。

  以上就是子(zi)昂機電收集的一(yi)些伺服電機的常見(jian)故(gu)障問題的處理方法(fa),希望能(neng)給(gei)你帶(dai)些幫助(zhu)。

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