M75RGB14

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描述

M75RGB14

希望廣大用戶能在變頻器發(fā)生故障時(shí),注重變頻器維修前的原因排查工作,并針對(duì)發(fā)生變頻器故障的原因,對(duì)癥下藥。希望這篇“排查故障原因讓變頻器維修更容易”能讓您們獲利。
? ? 當(dāng)技術(shù)人員發(fā)現(xiàn)變頻器發(fā)生故障時(shí),就會(huì)馬上找維修人員修理,或嚴(yán)重時(shí)就直接更換新的變頻器;然而,技術(shù)人員很少慢慢排查究竟是什么原因造成變頻器的損壞,并對(duì)癥下藥修理。所以電工論壇小編分享一下經(jīng)驗(yàn),希望技術(shù)人員以后碰到變頻器故障,做好維修前、維修時(shí)、維修后的檢查修理的跟進(jìn)工作,方便以后的變頻器維修工作。
? ? 在變頻器維修之前,必須要了解變頻器的原理與構(gòu)造。變頻器是把工頻電源(50Hz或60Hz)變換成各種頻率的交流電源,以實(shí)現(xiàn)電機(jī)的變速運(yùn)行的設(shè)備,其中控制電路完成對(duì)主電路的控制,整流電路將交流電變換成直流電,直流中間電路對(duì)整流電路的輸出進(jìn)行平滑濾波,逆變電路將直流電再逆變成交流電。對(duì)于如矢量控制變頻器這種需要大量運(yùn)算的變頻器來說,有時(shí)還需要一個(gè)進(jìn)行轉(zhuǎn)矩計(jì)算的CPU以及一些相應(yīng)的電路。這是變頻器修理中對(duì)變頻器的定義。
? ? 普及完變頻器的原理與構(gòu)造,提醒一下關(guān)于變頻器選型要注意的問題。不同牌子的變頻器都標(biāo)有功率段,不同牌子同功率的變頻器標(biāo)的可驅(qū)動(dòng)電機(jī)的容量是一樣的,但是變頻器的允許工作電流是不一樣的,有些偏低,有些偏高,因此,必須根據(jù)現(xiàn)場(chǎng)的負(fù)載性質(zhì)和電動(dòng)機(jī)的額定電流及生產(chǎn)工藝以后是否可能提產(chǎn)等因素來綜合選擇。同時(shí),變頻器對(duì)環(huán)境也是有要求的,選型的時(shí)候也必須注意按照環(huán)境來選擇,比如海拔、濕度、溫度,南方濕度高,就的選帶涂層電路板的變頻器,溫度高的就必須提高功率等級(jí)來等。
? ? 在維修變頻器前,大家都知道,過電流、過電壓、過溫、面板黑屏、接地故障等都是變頻器常會(huì)出現(xiàn)的故障,但當(dāng)碰到這些故障時(shí),不要急著去維修,而是首先要判斷好,這些故障是否真的發(fā)生了。在大多數(shù)情況下,這些故障的發(fā)生,其實(shí)只是變頻器本身的某些檢測(cè)元件出問題。比如,變頻器報(bào)過電流或電壓的故障,通常檢測(cè)之后是控制板本身發(fā)生了損壞,或者控制板上的某些元器件,由于年久導(dǎo)致了老化而失效造成的;有時(shí)過溫故障的發(fā)生,也只是變頻器內(nèi)部的冷卻風(fēng)扇控制的開關(guān)的輔助觸點(diǎn)出了問題而已。
? ? 在維修變頻器時(shí),首先要根據(jù)變頻器的故障提示,如:黑屏的直接查電源板,找出對(duì)應(yīng)故障的檢測(cè)電路或元件進(jìn)行排查。但往往,廠家都是不提供內(nèi)部電路板的電路圖的,這就對(duì)于用戶來說就造成了一定的困難,因此大多數(shù)用戶只能選擇更換同型號(hào)的電路板。這里要提醒大家,在更換同型號(hào)的電路板時(shí),有時(shí)候還需要注意軟件版本是否兼容。
? ? 小編希望廣大用戶能注重變頻器維修前的原因排查工作,并針對(duì)發(fā)生變頻器故障的原因,對(duì)癥下藥。完成這兩步驟,能大大降低耗時(shí)和耗費(fèi)。希望這篇“排查故障原因讓變頻器維修更容易”能讓您們獲利。

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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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15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫存商家


選擇深圳長(zhǎng)欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營(yíng):本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測(cè)速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時(shí)也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動(dòng)器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會(huì)一種至于其它的學(xué)習(xí)起來也就簡(jiǎn)單了。