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當前位置:首頁新聞資訊西門子變頻器的日常維護,你可知?

西門子變頻器的日常維護,你可知?

更新時間:2020-08-26點擊次數(shù):1189
   西門子變頻器也稱為變頻驅(qū)動器或驅(qū)動控制器,可譯作Inverter(和逆變器的英文相同)。變頻器是可調(diào)速驅(qū)動系統(tǒng)的一種,是應(yīng)用變頻驅(qū)動技術(shù)改變交流電動機工作電壓的頻率和幅度,來平滑控制交流電動機速度及轉(zhuǎn)矩,常見的是輸入及輸出都是交流電的交流/交流轉(zhuǎn)換器。
  西門子變頻器的日常維護:
  操作人員必須熟悉變頻器的基本工作原理、功能特點,具有電工操作常識。在對變頻器日常維護之前,必須保證設(shè)備總電源全部切斷;并且在變頻器顯示*消失的3-30分鐘(根據(jù)變頻器的功率)后再進行。應(yīng)注意檢查電網(wǎng)電壓,改善變頻器、電機及線路的周邊環(huán)境,定期清除變頻器內(nèi)部灰塵,通過加強設(shè)備管理大限度地降低變頻器的故障率。
  (1)冷卻風扇
  變頻器的功率模塊是發(fā)熱嚴重的器件,其連續(xù)工作所產(chǎn)生的熱量必須要及時排出,一般風扇的壽命大約為20kh~40kh。按變頻器連續(xù)運行折算為3~5年就要更換一次風扇,避免因散熱不良引發(fā)故障。
  (2)濾波電容
  中間電路濾波電容:又稱電解電容,該電容的作用:濾除整流后的電壓紋波,還在整流與逆變器之間起去耦作用,以消除相互干擾,還為電動機提供必要的無功功率,要承受大的脈沖電流,所以使用壽命短,因其要在工作中儲能,所以必須長期通電,它連續(xù)工作產(chǎn)生的熱量加上變頻器本身產(chǎn)生的熱量都會加速其電解液的干涸,直接影響其容量的大小。正常情況下電容的使用壽命為5年。建議每年定期檢查電容容量一次,一般其容量減少20%以上應(yīng)更換。
  (3)防腐劑的使用
  因一些公司的生產(chǎn)特性,各電氣mcc室的腐蝕氣體濃度過大,致使很多電氣設(shè)備因腐蝕損壞(包括變頻器)。 為了解決以上問題可安裝一套空調(diào)系統(tǒng),用正壓新鮮風來改善環(huán)境條件。為減少腐蝕性氣體對電路板上元器件的腐蝕,還可要求變頻器生產(chǎn)廠家對線路板進行防腐加工,維修后也要噴涂防腐劑,有效地降低了變頻器的故障率,提高了使用效率。
  在保養(yǎng)的同時要仔細檢查變頻器,定期送電,帶電機工作在2hz 的低頻約10分鐘,以確保變頻器工作正常。

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