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(kāi)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(guò)電流故障的原因有很多,應(yīng)該根據(jù)實(shí)際情況進(jìn)行分析。如果找對(duì)根源,然后對(duì)根據(jù)故障情況對(duì)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(lái)自變頻器側(cè)的影響。
變頻器側(cè)可能造成三菱變頻器過(guò)電流的常見(jiàn)原因有:
加速時(shí)間太短。此時(shí)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(zhǎng)加速時(shí)間。
提升功能。如果在V/f控制時(shí),起動(dòng)過(guò)程中,電壓提升過(guò)高,也可能造成過(guò)電流。適當(dāng)降低電壓提升值。
PID參數(shù)不合適。過(guò)高的動(dòng)態(tài)響應(yīng),可能造成過(guò)電流。延長(zhǎng)濾波時(shí)間,減P加I。
2、其次是來(lái)自電機(jī)側(cè)的影響。
電機(jī)側(cè)可能造成變頻器過(guò)電流的常見(jiàn)原因有:
電機(jī)電纜對(duì)地短路。電纜絕緣不好,有破皮??梢杂脫u表對(duì)電纜絕緣進(jìn)行檢測(cè),以確認(rèn)電纜質(zhì)量。
電機(jī)堵轉(zhuǎn)。此時(shí)變頻器會(huì)嘗試使用更大的轉(zhuǎn)矩讓電機(jī)轉(zhuǎn)動(dòng),可能造成過(guò)電流故障。
3、zui后是硬件問(wèn)題。
如果變頻器內(nèi)部的電流檢測(cè)機(jī)構(gòu)工作不正常,或者CPU處理機(jī)制出了問(wèn)題,這些都不是設(shè)參數(shù)就能解決的,需要報(bào)修。
如果變頻器與電機(jī)電流不匹配,也可能造成過(guò)電流故障。比如小變頻器帶大電機(jī),或者銘牌參數(shù)寫(xiě)錯(cuò)了,都可能造成過(guò)電流故障。
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