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6RA70觸發電源板維修/西門子調速器十年經驗，檢(jian)查(cha)(cha)方法 對這種故(gu)(gu)障,應(ying)先檢(jian)查(cha)(cha)調速(su)(su)器本身是(shi)(shi)否(fou)(fou)異常(chang)(chang)(chang)、參數(shu)設置是(shi)(shi)否(fou)(fou)正(zheng)確、調速(su)(su)輸(shu)入信號是(shi)(shi)否(fou)(fou) 正(zheng)常(chang)(chang)(chang)。如均正(zheng)常(chang)(chang)(chang),且(qie)運行時測得變(bian)頻器直流(liu)母線電(dian)壓(ya)(ya)只有約450V(正(zheng)常(chang)(chang)(chang)值應(ying)為580~600V), 則這種故(gu)(gu)障多是(shi)(shi)缺(que)相(缺(que)一(yi)相)引起的,應(ying)檢(jian)查(cha)(cha)電(dian)路中(zhong)的空氣開關接觸是(shi)(shi)否(fou)(fou)良好。 (2)故(gu)(gu)障原因 變(bian)頻器輸(shu)入缺(que)相不報(bao)警仍能在低頻段工作,是(shi)(shi)因為多數(shu)變(bian)頻器的母線電(dian)壓(ya)(ya)下限為400V, 而當(dang)母線電(dian)壓(ya)(ya)降至400V以下時,變(bian)頻器才顯示直流(liu)母線電(dian)壓(ya)(ya)低故(gu)(gu)障。

當(dang)(dang)兩(liang)相(xiang)輸(shu)入時,直(zhi) 流線電(dian)(dian)(dian)壓(ya)(ya)為 大于400V。當(dang)(dang)變(bian)頻(pin)(pin)(pin)器(qi)不運(yun)行時,由于濾波電(dian)(dian)(dian)容器(qi)的(de)(de)作(zuo)(zuo)用,直(zhi)流電(dian)(dian)(dian)壓(ya)(ya)也(ye)可達到(dao)正常值。新 型的(de)(de)變(bian)頻(pin)(pin)(pin)器(qi)都采用PWM(脈寬(kuan)調制(zhi)(zhi))控(kong)(kong)制(zhi)(zhi)技術,調壓(ya)(ya)調頻(pin)(pin)(pin)的(de)(de)工(gong)作(zuo)(zuo)在(zai)逆變(bian)橋(qiao)完(wan)成,所以(yi)在(zai) 低(di)(di)(di)頻(pin)(pin)(pin)段(duan)輸(shu)入缺相(xiang)仍(reng)可以(yi)正常工(gong)作(zuo)(zuo),但因輸(shu)入電(dian)(dian)(dian)壓(ya)(ya)、輸(shu)出電(dian)(dian)(dian)壓(ya)(ya)低(di)(di)(di),造(zao)成異(yi)步(bu)電(dian)(dian)(dian)動機(ji)(ji)(ji)轉(zhuan)(zhuan)矩低(di)(di)(di) 頻(pin)(pin)(pin)率(lv)上不去。變(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)設(she)定(ding)參(can)數較多(duo)，每(mei)個(ge)參(can)數均(jun)有一定(ding)的(de)(de)選擇(ze)范(fan)圍，使用中常常遇(yu)到(dao)因個(ge)別參(can)數設(she)置不當(dang)(dang)，導致(zhi)變(bian)頻(pin)(pin)(pin)器(qi)不能正常工(gong)作(zuo)(zuo)的(de)(de)現象(xiang)，因此，必(bi)須對相(xiang)關的(de)(de)參(can)數進行正確的(de)(de)設(she)定(ding)，1、控(kong)(kong)制(zhi)(zhi)方(fang)式(shi)(shi)：即速度(du)控(kong)(kong)制(zhi)(zhi)、轉(zhuan)(zhuan)距控(kong)(kong)制(zhi)(zhi)、PID控(kong)(kong)制(zhi)(zhi)或(huo)(huo)其他方(fang)式(shi)(shi)，采取控(kong)(kong)制(zhi)(zhi)方(fang)式(shi)(shi)后(hou)，一般要根(gen)據控(kong)(kong)制(zhi)(zhi)精度(du)進行靜態或(huo)(huo)動態辨識(shi)，2、最(zui)低(di)(di)(di)運(yun)行頻(pin)(pin)(pin)率(lv)：即電(dian)(dian)(dian)機(ji)(ji)(ji)運(yun)行的(de)(de)最(zui)小轉(zhuan)(zhuan)速，電(dian)(dian)(dian)機(ji)(ji)(ji)在(zai)低(di)(di)(di)轉(zhuan)(zhuan)速下運(yun)行時，其散熱性能很差，電(dian)(dian)(dian)機(ji)(ji)(ji)長時間運(yun)行在(zai)低(di)(di)(di)轉(zhuan)(zhuan)速下，會導致(zhi)電(dian)(dian)(dian)機(ji)(ji)(ji)燒(shao)毀(hui)。

西門(men)子直流(liu)調速(su)(su)器(qi)(qi)/控制(zhi)器(qi)(qi)/驅動(dong)器(qi)(qi)/變頻器(qi)(qi)6RA70維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)故障(zhang)范圍包括：上電跳閘(zha)，運行炸可(ke)控硅(gui)，模塊壞(huai)(huai)，IGBT燒，通(tong)電燒保(bao)(bao)險(xian)，無(wu)勵磁電壓(ya)，報(bao)勵磁故障(zhang)，勵磁過流(liu)，速(su)(su)度不可(ke)控維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，超速(su)(su)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，帶負載報(bao)故障(zhang)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，冷卻(que)風(feng)機壞(huai)(huai)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，散熱風(feng)扇壞(huai)(huai)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，直流(liu)調速(su)(su)裝(zhuang)置風(feng)扇銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，勵磁板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，電源(yuan)板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，可(ke)控硅(gui)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，晶閘(zha)管銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，熔(rong)斷器(qi)(qi)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，主板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，面(mian)板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，擴展板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，CBP2板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，通(tong)訊(xun)板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，脈沖觸(chu)發板(ban)銷(xiao)(xiao)(xiao)(xiao)售(shou)(shou)(shou)，轉速(su)(su)度不穩(wen)定維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，可(ke)控硅(gui)晶閘(zha)管燒維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，直流(liu)調速(su)(su)裝(zhuang)置無(wu)顯示(shi)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，A018,A015,運轉速(su)(su)度不連貫維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，高速(su)(su)不穩(wen)定維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，低速(su)(su)不穩(wen)定維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，啟動(dong)合閘(zha)跳保(bao)(bao)險(xian)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，運轉不出(chu)力維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)，控制(zhi)板(ban)維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)等(deng)等(deng)。常(chang)見故障(zhang)報(bao)警：F001，F004，F005，F006 ，F007 ，F030 ，F038，F040  F042，F046，F040，F050，F052等(deng)等(deng)報(bao)警維(wei)(wei)(wei)(wei)(wei)修(xiu)(xiu)(xiu)(xiu)。

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