西(xi)門子6SE70伺(si)服變頻(pin)器(qi)速度不對當天修(xiu)(xiu)復好;上(shang)海恒稅電(dian)氣有限公司(si),你的(de)(de)(de)(de)選擇沒有錯。公司(si)自成立以來(lai),長期(qi)銷售維修(xiu)(xiu)西(xi)門子變頻(pin)器(qi)及伺(si)服驅動器(qi)的(de)(de)(de)(de),觸摸屏,PLC,直流調速器(qi)等,積累了豐富的(de)(de)(de)(de)維修(xiu)(xiu)經驗(yan),對所維修(xiu)(xiu)的(de)(de)(de)(de)機(ji)器(qi)建立完善(shan)(shan)的(de)(de)(de)(de)維修(xiu)(xiu)檔案,所有我們維修(xiu)(xiu)的(de)(de)(de)(de)機(ji)器(qi)我們都有完善(shan)(shan)的(de)(de)(de)(de)參數備份,確(que)保我們維修(xiu)(xiu)的(de)(de)(de)(de)機(ji)器(qi)上(shang)機(ji)即能使用。
西門子6SE70伺服變頻器速度不對當天修復好;故障分析;
變頻器(qi)時(shi),客戶送修(xiu)時(shi)標明電機行抖(dou)動,此時(shi)第(di)一反應是輸出(chu)電壓不(bu)平衡(heng).在檢(jian)查功率器(qi)件后發現(xian)無(wu)損壞,給變頻器(qi)通電顯示正常(chang),運行變頻器(qi),測(ce)量(liang)三相(xiang)輸出(chu)電壓確實(shi)不(bu)平衡(heng),測(ce)試六路(lu)數出(chu)波形(xing),發現(xian)W相(xiang)下橋(qiao)波形(xing)不(bu)正常(chang),依次測(ce)量(liang)該(gai)路(lu)電阻,二極管,光耦。發現(xian)提(ti)供反壓的(de)一二極管擊(ji)穿,更換后,重新上電運行,三相(xiang)輸出(chu)電壓平衡(heng),修(xiu)復。
(2) 變頻器頻率上不(bu)去
在接(jie)修一臺普傳220V,單相,1.5kW變(bian)頻(pin)(pin)器(qi)時,客戶標明(ming)頻(pin)(pin)率上不(bu)(bu)去,只(zhi)能上到(dao)20Hz,此時第一想到(dao)的(de)是有(you)可(ke)能參(can)數(shu)設(she)置不(bu)(bu)當,依次檢查(cha)參(can)數(shu),發現最(zui)高(gao)(gao)頻(pin)(pin)率,上限頻(pin)(pin)率都(dou)為(wei)60Hz,可(ke)見(jian)不(bu)(bu)是參(can)數(shu)問題,又(you)懷疑是頻(pin)(pin)率給(gei)定(ding)方(fang)式不(bu)(bu)對(dui),后改成面(mian)板給(gei)定(ding)頻(pin)(pin)率,變(bian)頻(pin)(pin)器(qi)最(zui)高(gao)(gao)可(ke)運(yun)行到(dao)60Hz,由(you)此看來(lai),問提出在模擬(ni)量輸入電路上,檢查(cha)此電路時,發現一貼片(pian)電容(rong)損(sun)壞,更換后,變(bian)頻(pin)(pin)器(qi)正常(chang)。
(3) 變(bian)頻器跳過流(liu)
在(zai)接(jie)修一臺(tai)(tai)臺(tai)(tai)安N2系列(lie),400V,3.7kW變(bian)頻器時,客戶標明在(zai)起動(dong)(dong)時顯(xian)示過(guo)電(dian)(dian)流。在(zai)檢(jian)(jian)查模(mo)塊確認完好后,給(gei)變(bian)頻器通電(dian)(dian),在(zai)不帶電(dian)(dian)機(ji)的情況下,啟(qi)動(dong)(dong)一瞬間顯(xian)示OC2,首先想到的是電(dian)(dian)流檢(jian)(jian)測(ce)(ce)(ce)電(dian)(dian)路(lu)(lu)損壞,依(yi)次更換檢(jian)(jian)測(ce)(ce)(ce)電(dian)(dian)路(lu)(lu),發現(xian)(xian)故(gu)障依(yi)然無(wu)法(fa)消除。于是擴大檢(jian)(jian)測(ce)(ce)(ce)范圍,檢(jian)(jian)查驅動(dong)(dong)電(dian)(dian)路(lu)(lu),在(zai)檢(jian)(jian)查驅動(dong)(dong)波(bo)形(xing)(xing)時發現(xian)(xian)有(you)一路(lu)(lu)波(bo)形(xing)(xing)不正常(chang),檢(jian)(jian)查其周邊器件,發現(xian)(xian)一貼片電(dian)(dian)容有(you)短(duan)路(lu)(lu),更換后,變(bian)頻器運行(xing)良好。
(4) 變頻(pin)器整流橋二次損(sun)壞
在接修一臺變頻(pin)器(qi)時(shi),檢(jian)查(cha)(cha)時(shi)發(fa)(fa)現(xian)(xian)整(zheng)(zheng)流(liu)橋損壞(huai)(huai),無其它不(bu)良(liang)之(zhi)處(chu),更(geng)(geng)換后,帶負載運(yun)行(xing)良(liang)好。不(bu)到(dao)一個月,客戶再次(ci)拿來(lai)。檢(jian)查(cha)(cha)時(shi)發(fa)(fa)現(xian)(xian)整(zheng)(zheng)流(liu)橋再次(ci)損壞(huai)(huai),此時(shi)懷疑變頻(pin)器(qi)某處(chu)絕(jue)緣不(bu)好,單獨(du)檢(jian)查(cha)(cha)電容,正常(chang)。單獨(du)檢(jian)查(cha)(cha)逆變模(mo)塊(kuai),無不(bu)良(liang)癥狀,檢(jian)查(cha)(cha)各(ge)個端(duan)子(zi)(zi)與地之(zhi)間(jian)也(ye)未發(fa)(fa)現(xian)(xian)絕(jue)緣不(bu)良(liang)問題,再仔細(xi)檢(jian)查(cha)(cha),發(fa)(fa)現(xian)(xian)直流(liu)母(mu)線回(hui)路端(duan)子(zi)(zi)P-P1與N之(zhi)間(jian)的塑料(liao)絕(jue)緣端(duan)子(zi)(zi)有炭化跡象,拆開端(duan)子(zi)(zi)查(cha)(cha)看,果然發(fa)(fa)現(xian)(xian)端(duan)子(zi)(zi)碳化已相當嚴(yan)重(zhong),從(cong)安(an)全角度(du)考慮,更(geng)(geng)換損壞(huai)(huai)端(duan)子(zi)(zi),變頻(pin)器(qi)恢復正常(chang)運(yun)行(xing),正常(chang)運(yun)行(xing)已有半年(nian)多。
西門子6SE70伺服變頻器速度不對當天修復好;故障分析;
變(bian)頻(pin)器(qi)(qi)常(chang)(chang)發(fa)生(sheng)的故障(zhang)(zhang),通常(chang)(chang)是由于開關電(dian)源(yuan)的元(yuan)器(qi)(qi)件損壞(huai)或(huo)負載(zai)發(fa)生(sheng)短路造成(cheng)(cheng)的,丹佛斯變(bian)頻(pin)器(qi)(qi)采用了新型脈寬集成(cheng)(cheng)控(kong)制器(qi)(qi)uc2844來調整開關電(dian)源(yuan)的輸出,同時uc2844還(huan)帶有(you)電(dian)流(liu)檢測(ce),電(dian)壓反饋(kui)等(deng)(deng)功能。當發(fa)生(sheng)無顯(xian)示,控(kong)制端子無電(dian)壓,24v風扇不運轉等(deng)(deng)現(xian)象(xiang)時我們首先(xian)應(ying)該(gai)考(kao)慮開關電(dian)源(yuan)是否損壞(huai)(一般為(wei)uc2844或(huo)電(dian)阻損壞(huai))。如果不能判(pan)斷是否電(dian)源(yuan)故障(zhang)(zhang),可以外接(jie)24v電(dian)源(yuan)進(jin)行(xing)測(ce)試,測(ce)試結果一切正常(chang)(chang)可以判(pan)定為(wei)電(dian)源(yuan)故障(zhang)(zhang)。
檢(jian)測(ce)時發(fa)現(xian)(xian)逆變(bian)(bian)模塊(kuai)(kuai)損壞,更換(huan)(huan)模塊(kuai)(kuai)后(hou),變(bian)(bian)頻器(qi)(qi)正常運(yun)(yun)行。由(you)于(yu)(yu)該臺(tai)機(ji)器(qi)(qi)運(yun)(yun)行環境較(jiao)差(cha),機(ji)器(qi)(qi)內部灰塵(chen)堆積嚴(yan)重,且該臺(tai)機(ji)器(qi)(qi)使(shi)用年限較(jiao)長,決定(ding)對(dui)它進(jin)行除塵(chen)及更換(huan)(huan)老化器(qi)(qi)件的維(wei)護(hu)。以提高其使(shi)用壽(shou)命,器(qi)(qi)件更換(huan)(huan)后(hou),給(gei)變(bian)(bian)頻器(qi)(qi)通(tong)電(dian),上電(dian)一瞬間,只聽“砰"的一聲響動,并伴隨飛出許多碎屑,斷開(kai)電(dian)源,發(fa)現(xian)(xian)C14電(dian)解電(dian)容炸(zha)裂,此刻想到的是(shi)有(you)可能電(dian)容裝反,于(yu)(yu)是(shi)根據其標識再裝一次(ci)(ci),再次(ci)(ci)上電(dian),電(dian)容又一次(ci)(ci)炸(zha)裂。于(yu)(yu)是(shi)進(jin)一步檢(jian)查其線路,發(fa)現(xian)(xian)線路與電(dian)容標識無法對(dui)上,于(yu)(yu)是(shi)將(jiang)錯就錯,把(ba)電(dian)容裝反,再次(ci)(ci)上電(dian),運(yun)(yun)行正常。這(zhe)一點在(zai)后(hou)來(lai)送修的相同(tong)的機(ji)器(qi)(qi)得以證實。
西門子6SE70伺服變(bian)(bian)(bian)(bian)頻(pin)器常年(nian)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu)復;主(zhu)板(ban)(ban)壞維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),變(bian)(bian)(bian)(bian)頻(pin)器風(feng)扇(shan)壞維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),面(mian)板(ban)(ban)無(wu)顯(xian)(xian)示維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),啟動報(bao)(bao)故(gu)障維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),變(bian)(bian)(bian)(bian)頻(pin)器發(fa)熱大維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),帶不(bu)了負(fu)載維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),跳(tiao)閘維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),主(zhu)板(ban)(ban)壞維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),風(feng)扇(shan)壞維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),西門子6SE70變(bian)(bian)(bian)(bian)頻(pin)器維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),燒保險維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),無(wu)輸出維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),啟動報(bao)(bao)故(gu)障維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),復不(bu)了位維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),電機運轉不(bu)連貫(guan)維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),模塊炸維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),CUVC出問題維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),驅動板(ban)(ban)壞維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),觸發(fa)板(ban)(ban)壞,面(mian)板(ban)(ban)無(wu)顯(xian)(xian)示維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),顯(xian)(xian)示o000維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),報(bao)(bao)警ooo8維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu),顯(xian)(xian)示F002信號檢測回路維(wei)修(xiu)(xiu)(xiu)(xiu)(xiu)(xiu)
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