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西門子S120電機驅動器輸出環受限當天修好
公司從事SINUMERIK數控機(ji)床、工控設備(bei)(bei)(bei)、自動化設備(bei)(bei)(bei)、機(ji)電設備(bei)(bei)(bei)、電路板、PLC等(deng)硬(ying)(ying)件(jian)故障維修及檢(jian)測(ce)專(zhuan)家,公司擁有技術團(tuan)隊(dui),維修級(ji)工程師已超過十年硬(ying)(ying)件(jian)維修技術,配有高(gao)的檢(jian)測(ce)設備(bei)(bei)(bei),自主搭(da)建了840D、840DSL、828D、840C、802D、802DSL、840C,810D,等(deng)數控系統(tong)模擬測(ce)試平臺,可以快速可靠(kao)的檢(jian)測(ce)設備(bei)(bei)(bei)故障點位,維修準,上(shang)機(ji)測(ce)試正常后提(ti)供給客(ke)戶(hu),使設備(bei)(bei)(bei)能達到現場正常使用。為(wei)用戶(hu)節約時間成本(ben)、提(ti)高(gao)生產(chan)效率!
西門子S120電機驅動器輸出環受限當天修好
拆開機器(qi)(qi)就(jiu)發現(xian)嚴(yan)重的(de)(de)短路現(xian)象,整流模塊和(he)IGBT模塊爆(bao)裂,短路造成的(de)(de)黑色積炭噴(pen)得到(dao)處(chu)(chu)都是(shi)(shi),主(zhu)回路兩個繼電(dian)器(qi)(qi)也爆(bao)開,主(zhu)控板暫時沒有(you)發現(xian)問題,但驅動部分(fen)(fen)燒了(le)好幾(ji)處(chu)(chu),另(ling)外儲能大電(dian)容(rong)(rong)一部分(fen)(fen)都已發漲(zhang),電(dian)容(rong)(rong)板上(shang)的(de)(de)兩顆(ke)大螺絲接(jie)(jie)觸處(chu)(chu)全部燒焦(jiao),這就(jiu)是(shi)(shi)西(xi)門(men)子ECO變頻器(qi)(qi)的(de)(de)通(tong)病,因為(wei)(wei)所有(you)電(dian)量都是(shi)(shi)要(yao)經過這兩顆(ke)鐵螺絲,一旦鐵螺絲生銹,很容(rong)(rong)易(yi)引(yin)起電(dian)容(rong)(rong)的(de)(de)充放(fang)電(dian)不(bu)良(liang),這樣電(dian)容(rong)(rong)發熱(re),漏電(dian),發漲(zhang)到(dao)zui后(hou)損壞重要(yao)器(qi)(qi)件就(jiu)不(bu)在(zai)話了(le),為(wei)(wei)了(le)防止再次(ci)接(jie)(jie)觸不(bu)良(liang)打火,在(zai)上(shang)螺絲同時焊上(shang)幾(ji)股粗銅線,維修觸發板時不(bu)知道參數的(de)(de),可(ke)以(yi)從控制板上(shang)完好的(de)(de)器(qi)(qi)件與損壞相同的(de)(de)對比,修復(fu)該板的(de)(de)電(dian)壓分(fen)(fen)別(bie)為(wei)(wei)-4.7伏(fu),-4.44伏(fu),更(geng)換損壞器(qi)(qi)件后(hou),可(ke)以(yi)加電(dian)試驗,試驗步驟按(an)主(zhu)回路到(dao)控制空載,負載分(fen)(fen)別(bie)運行檢查(cha)。
2、西門子變(bian)(bian)頻器加電(dian)前(qian):加電(dian)試驗前(qian)為(wei)保證器件安全,防止再次損壞重要器件,大電(dian)容(rong)暫時(shi)不要裝(zhuang)上,用兩只小(xiao)電(dian)容(rong)代替,為(wei)了(le)保護IGBT,電(dian)容(rong)到IGBT的供電(dian)回路是串聯白(bai)熾燈泡(也就是接個(ge)(ge)假(jia)負載(zai)),通電(dian)后如(ru)果顯示正常(chang),可(ke)以啟(qi)動變(bian)(bian)頻器,再測量(liang)6個(ge)(ge)觸發脈沖,如(ru)果信號正常(chang),可(ke)以去掉電(dian)容(rong)與IGBT之間的燈泡,裝(zhuang)上大電(dian)容(rong)進行空載(zai)運行,正常(chang)后再接負載(zai)運行,經(jing)調(diao)試機器后一般恢復正常(chang)。
3、故障現象:西門(men)子變頻器電源不正常工作,無顯示。
故障分析與維修:
此開(kai)關電(dian)源(yuan)(yuan)采用(yong)脈寬(kuan)調節稅制集(ji)(ji)成(cheng)(cheng)(cheng)電(dian)路UC2844來控(kong)制,首先將電(dian)源(yuan)(yuan)板(ban)取出(chu)與(yu)(yu)IGBT分(fen)離以避免(mian)因(yin)電(dian)源(yuan)(yuan)故(gu)障造(zao)成(cheng)(cheng)(cheng)IGBT損壞,找到(dao)電(dian)源(yuan)(yuan)板(ban)輸(shu)(shu)入(ru)560VDC正(zheng)負極通(tong)電(dian),測量UC2844的(de)(de)脈沖(chong)輸(shu)(shu)出(chu)端有(you)(you)斷續脈沖(chong),UC2844的(de)(de)電(dian)源(yuan)(yuan)端11,12腳有(you)(you)(80→10)鋸齒波。因(yin)此可以判(pan)斷UC2844是(shi)(shi)好(hao)的(de)(de),是(shi)(shi)UC2844的(de)(de)供(gong)電(dian)不正(zheng)常。UC2844啟(qi)振后(hou)補(bu)充供(gong)電(dian)是(shi)(shi)靠變壓器有(you)(you)一(yi)組電(dian)壓反(fan)饋以維持UC2844正(zheng)常持續脈沖(chong)輸(shu)(shu)出(chu)。測量開(kai)關管(guan)集(ji)(ji)成(cheng)(cheng)(cheng)電(dian)極有(you)(you)一(yi)與(yu)(yu)脈沖(chong)與(yu)(yu)驅(qu)動(dong)脈沖(chong)互為反(fan)相,證明明開(kai)關管(guan)是(shi)(shi)好(hao)的(de)(de)。因(yin)此故(gu)障原(yuan)因(yin)有(you)(you)可能是(shi)(shi)次級負載短路或是(shi)(shi)反(fan)饋繞組至(zhi)UC2844電(dian)源(yuan)(yuan)端一(yi)路不正(zheng)常,檢查負載后(hou)發現有(you)(you)一(yi)整流管(guan)燒壞至(zhi)短路,更換后(hou)通(tong)電(dian)正(zheng)常。
西門(men)子(zi)S120電機(ji)控(kong)制器(qi)輸出環(huan)受限(xian)其他(ta)故(gu)(gu)(gu)(gu)障(zhang)(zhang)修(xiu)復包括;溫度故(gu)(gu)(gu)(gu)障(zhang)(zhang),過熱報警(jing),電機(ji)不(bu)(bu)(bu)轉(zhuan)、接地故(gu)(gu)(gu)(gu)障(zhang)(zhang),功(gong)率(lv)部件(jian)故(gu)(gu)(gu)(gu)障(zhang)(zhang),輸出電壓過高,母(mu)線直流電壓無(wu)(wu)輸出,燒(shao)保險,跳閘,炸(zha)模(mo)塊,欠壓,過流,黃燈不(bu)(bu)(bu)亮(liang),指示(shi)(shi)燈全不(bu)(bu)(bu)亮(liang),紅燈亮(liang),帶不(bu)(bu)(bu)動(dong)(dong)負載,RDY紅燈,可控(kong)硅(gui)壞,電路板(ban)燒(shao)毀,轉(zhuan)動(dong)(dong)不(bu)(bu)(bu)平穩,不(bu)(bu)(bu)能(neng)(neng)(neng)正常工(gong)作(zuo),顯示(shi)(shi)準備未就緒,伺(si)服驅動(dong)(dong)故(gu)(gu)(gu)(gu)障(zhang)(zhang),編碼器(qi)損壞,編碼器(qi)報警(jing),DP通訊故(gu)(gu)(gu)(gu)障(zhang)(zhang),X軸(zhou)故(gu)(gu)(gu)(gu)障(zhang)(zhang),Y軸(zhou)不(bu)(bu)(bu)工(gong)作(zuo),Z軸(zhou)無(wu)(wu)使能(neng)(neng)(neng),超限(xian)報警(jing),軸(zhou)使能(neng)(neng)(neng)報警(jing),系統報380500,30021,31885,30020,7930,f07016,702844維(wei)(wei)修(xiu),功(gong)率(lv)單(dan)元接地故(gu)(gu)(gu)(gu)障(zhang)(zhang),功(gong)率(lv)部件(jian)故(gu)(gu)(gu)(gu)障(zhang)(zhang)維(wei)(wei)修(xiu)