PROSOFT MVI46-MBP模塊
ProSoft Technology 專業(yè)為大型自控產(chǎn)品供應(yīng)商，如 Rockwell Automation 和 Schneider 電氣等，開發(fā)通訊解決方案。
PROSOFT MVI46-MBP模塊ProSoft Technology 專業(yè)為大型自控產(chǎn)品供應(yīng)商，如 Rockwell Automation 和 Schneider 電氣等，開發(fā)通訊解決方案。
PROSOFT MVI46-MBP模塊
PROSOFT MVI46-MBP模塊
造成三菱變頻器過電流故障的原因有很多，應(yīng)該根據(jù)實際情況進(jìn)行分析。如果找對根源，然后對根據(jù)故障情況對三菱變頻器進(jìn)行維修，一般都可以解決。電機(jī)電纜連接著變頻器和電機(jī)。那就從變頻器側(cè)和電機(jī)側(cè)分別進(jìn)行分析。
1、首先是來自變頻器側(cè)的影響。
變頻器側(cè)可能造成三菱變頻器過電流的常見原因有：
加速時間太短。此時所需要的電機(jī)轉(zhuǎn)矩就越大，轉(zhuǎn)矩與電流成正比，所以電流也很大。適當(dāng)延長加速時間。
提升功能。如果在V/f控制時，起動過程中，電壓提升過高，也可能造成過電流。適當(dāng)降低電壓提升值。
PID參數(shù)不合適。過高的動態(tài)響應(yīng)，可能造成過電流。延長濾波時間，減P加I。
2、其次是來自電機(jī)側(cè)的影響。
電機(jī)側(cè)可能造成變頻器過電流的常見原因有：
電機(jī)電纜對地短路。電纜絕緣不好，有破皮?？梢杂脫u表對電纜絕緣進(jìn)行檢測，以確認(rèn)電纜質(zhì)量。
電機(jī)堵轉(zhuǎn)。此時變頻器會嘗試使用更大的轉(zhuǎn)矩讓電機(jī)轉(zhuǎn)動，可能造成過電流故障。
3、zui后是硬件問題。
如果變頻器內(nèi)部的電流檢測機(jī)構(gòu)工作不正常，或者CPU處理機(jī)制出了問題，這些都不是設(shè)參數(shù)就能解決的，需要報修。
如果變頻器與電機(jī)電流不匹配，也可能造成過電流故障。比如小變頻器帶大電機(jī)，或者銘牌參數(shù)寫錯了，都可能造成過電流故障。
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