描述
3HAC026254-001
最后進(jìn)行帶負(fù)載的調(diào)試運行
通過以上兩步驟的試運行,就可以進(jìn)行帶負(fù)載的投運工作了,也就是對設(shè)定的參數(shù)進(jìn)行調(diào)整,使變頻器能按要求正常驅(qū)動電動機(jī)運行。在電動機(jī)帶負(fù)載的調(diào)試運行過程中要注意觀察電動機(jī)、機(jī)械有無異常響聲、有無振動現(xiàn)象。?其操作方法基本與第二步驟是一樣的,由于變頻器出廠時的參數(shù)預(yù)設(shè)值可能與使用現(xiàn)場的負(fù)載特性有差距,就要結(jié)合現(xiàn)場的實際對某些參數(shù)進(jìn)行調(diào)整,即進(jìn)行參數(shù)的設(shè)定和調(diào)試。調(diào)試中重點應(yīng)觀察電動機(jī)帶負(fù)載啟動時,轉(zhuǎn)矩的設(shè)定、加、減速時間的設(shè)定是否與負(fù)載特性匹配。最直觀的就是看電動機(jī)在啟動、加速、減速過程中有沒有跳閘報警出現(xiàn),否則應(yīng)根據(jù)實際情況對相關(guān)參數(shù)再進(jìn)行調(diào)整。
具體是把頻率給定電位器順時針旋至右端50Hz處,然后接通變頻器的正轉(zhuǎn)開關(guān)(FWD),則電動機(jī)應(yīng)該按設(shè)定的加速時間上升轉(zhuǎn)速至最大,在加速過程中如果過載、過流報警或跳閘,說明加速時間設(shè)定短了應(yīng)適當(dāng)加長加速時間。在最大頻率50%處,讓電動機(jī)轉(zhuǎn)動幾分鐘,并觀察電壓、電流的數(shù)值。然后關(guān)斷正轉(zhuǎn)開關(guān),電動機(jī)應(yīng)該按設(shè)定的減速時間下降轉(zhuǎn)速并停下來,在減速過程中如果過載、過壓報警或跳閘,說明減速時間設(shè)定過短應(yīng)適當(dāng)加長減速時間。然后再旋動頻率給定電位器,用其來加大、減小給定頻率,并觀察電動機(jī)能否平穩(wěn)升速和減速,且不報警不跳閘。用電流信號作頻率給定的變頻器,其調(diào)試方法同上,只是把調(diào)電位器改為調(diào)電流大小而已。
在調(diào)試中,變頻器報警、跳閘是很平常的事情,對于初學(xué)者不要驚慌失措。報警、跳閘說明變頻器的保護(hù)動作功能正常,是由于調(diào)試時沒有把相關(guān)參數(shù)調(diào)至理想狀態(tài),也就是說還沒有達(dá)到負(fù)載特性的要求,這時可通過變頻器的故障顯示信息,再結(jié)合用戶手冊來決定下一步的調(diào)試思路,直到取得滿意的調(diào)試效果。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
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