為什么變(bian)(bian)壓(ya)(ya)器(qi)投(tou)運(yun)前必須進(jin)行5次沖擊試驗？檢查(cha)變(bian)(bian)壓(ya)(ya)器(qi)差(cha)動保(bao)護(hu)是(shi)否(fou)誤(wu)動。帶(dai)電投(tou)入空載(zai)變(bian)(bian)壓(ya)(ya)器(qi)時(shi)(shi)，會產(chan)生勵(li)(li)磁涌(yong)(yong)流(liu)(liu)，其值(zhi)可(ke)(ke)達6-8倍額定(ding)電流(liu)(liu)。勵(li)(li)磁涌(yong)(yong)流(liu)(liu)開始(shi)衰減(jian)較快，一般經o.5—1s即可(ke)(ke)減(jian)到(dao)0.25—0.5倍額定(ding)電流(liu)(liu)，但全部(bu)衰減(jian)完畢(bi)時(shi)(shi)間(jian)較長，中小(xiao)型變(bian)(bian)壓(ya)(ya)器(qi)約幾秒，大(da)型變(bian)(bian)壓(ya)(ya)器(qi)可(ke)(ke)達10-20s，故(gu)勵(li)(li)磁涌(yong)(yong)流(liu)(liu)衰減(jian)初期，往往使差(cha)動保(bao)護(hu)誤(wu)動，造成變(bian)(bian)壓(ya)(ya)器(qi)不(bu)能(neng)投(tou)入。因此(ci)，空載(zai)沖擊合閘(zha)時(shi)(shi)，在勵(li)(li)磁涌(yong)(yong)流(liu)(liu)作用(yong)下，可(ke)(ke)對差(cha)動保(bao)護(hu)的(de)接(jie)線、特性(xing)(xing)、定(ding)值(zhi)進(jin)行實際(ji)檢查(cha)，并作出保(bao)護(hu)可(ke)(ke)否(fou)投(tou)入的(de)評價和結論。降低(di)變(bian)(bian)頻(pin)器(qi)運(yun)行溫度，就延長了變(bian)(bian)頻(pin)器(qi)的(de)使用(yong)壽命，性(xing)(xing)能(neng)也穩定(ding)。浙江(jiang)工(gong)程變(bian)(bian)頻(pin)器(qi)供貨公(gong)司

低壓變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器在運(yun)行過(guo)程中有功率損(sun)(sun)耗(hao)，并轉換為熱(re)能，使自身的(de)(de)(de)(de)溫度(du)升高。粗略地(di)說，每(mei)1kva的(de)(de)(de)(de)變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器容量(liang)，其損(sun)(sun)耗(hao)功率約為40w～50w。因(yin)此(ci)，安裝(zhuang)(zhuang)變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器時(shi)(shi)要(yao)考慮變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器散(san)熱(re)問(wen)題(ti)，要(yao)考慮如(ru)何把變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器運(yun)行時(shi)(shi)產生的(de)(de)(de)(de)熱(re)量(liang)充分地(di)散(san)發出(chu)去，因(yin)此(ci)要(yao)講究(jiu)安裝(zhuang)(zhuang)方式(shi)(shi)。柜(ju)式(shi)(shi)安裝(zhuang)(zhuang)方式(shi)(shi)：當現(xian)場的(de)(de)(de)(de)灰塵過(guo)多，濕度(du)比較(jiao)大，或變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器外面配件比較(jiao)多，需要(yao)和變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器安裝(zhuang)(zhuang)在一起時(shi)(shi)，可(ke)以(yi)采用(yong)柜(ju)式(shi)(shi)安裝(zhuang)(zhuang)。變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器柜(ju)式(shi)(shi)安裝(zhuang)(zhuang)是目前至好(hao)的(de)(de)(de)(de)安裝(zhuang)(zhuang)方式(shi)(shi)，因(yin)為可(ke)以(yi)起到很(hen)好(hao)的(de)(de)(de)(de)屏蔽幅射干擾，同時(shi)(shi)也能防(fang)灰塵、防(fang)潮濕、防(fang)光(guang)照等作(zuo)用(yong)。柜(ju)式(shi)(shi)安裝(zhuang)(zhuang)方式(shi)(shi)的(de)(de)(de)(de)注意事項(xiang)：1、單臺(tai)變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器采用(yong)柜(ju)內冷(leng)卻方式(shi)(shi)時(shi)(shi)，變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)柜(ju)頂端(duan)應安裝(zhuang)(zhuang)抽風式(shi)(shi)冷(leng)卻風扇，并盡(jin)量(liang)裝(zhuang)(zhuang)在變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器的(de)(de)(de)(de)正上方（這樣(yang)便于空氣流通(tong)）。2、多臺(tai)變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器安裝(zhuang)(zhuang)應盡(jin)量(liang)并列安裝(zhuang)(zhuang)，如(ru)必須采用(yong)縱向方式(shi)(shi)安裝(zhuang)(zhuang)，應在兩臺(tai)變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器間加裝(zhuang)(zhuang)隔板。嘉興變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器變(bian)(bian)(bian)頻(pin)(pin)(pin)(pin)器的(de)(de)(de)(de)作(zuo)用(yong)還可(ke)以(yi)降(jiang)低電力線路電壓波動(dong)。

變頻(pin)(pin)器(qi)是現代(dai)工業(ye)(ye)自動(dong)化(hua)的關鍵組件。它的主要功(gong)能是調整電機的運行(xing)(xing)頻(pin)(pin)率(lv)，從而實現對(dui)電機速(su)度的精確控制(zhi)。變頻(pin)(pin)器(qi)在眾多行(xing)(xing)業(ye)(ye)中都有(you)廣泛的應用，如機械制(zhi)造、石油化(hua)工、冶金等，對(dui)于(yu)提升(sheng)生產效率(lv)和能源利用效率(lv)具有(you)明顯效果。隨著技術的發展(zhan)，變頻(pin)(pin)器(qi)也在不斷進步，功(gong)能更(geng)(geng)加強大，體積更(geng)(geng)加小巧(qiao)，操作更(geng)(geng)加便(bian)捷。如今，變頻(pin)(pin)器(qi)已經成(cheng)為電氣工程師(shi)的得力助手，助力工業(ye)(ye)生產邁向更(geng)(geng)高的水(shui)平(ping)。在未來(lai)，變頻(pin)(pin)器(qi)還將繼(ji)續發揮(hui)重要作用，推(tui)動(dong)工業(ye)(ye)自動(dong)化(hua)領域(yu)的發展(zhan)。

變(bian)(bian)(bian)頻(pin)器(qi)軟啟動(dong)(dong)(dong)節(jie)(jie)能(neng)：電(dian)(dian)(dian)機(ji)硬啟動(dong)(dong)(dong)對電(dian)(dian)(dian)網(wang)(wang)造成嚴重的(de)(de)(de)(de)(de)沖擊，而且還會對電(dian)(dian)(dian)網(wang)(wang)容(rong)(rong)量要求過高，啟動(dong)(dong)(dong)時(shi)產生的(de)(de)(de)(de)(de)大電(dian)(dian)(dian)流和(he)(he)震動(dong)(dong)(dong)時(shi)對擋板和(he)(he)閥門的(de)(de)(de)(de)(de)損(sun)害(hai)極大，對設備(bei)、管(guan)路的(de)(de)(de)(de)(de)使(shi)(shi)用(yong)(yong)壽(shou)命(ming)極為不(bu)利。而使(shi)(shi)用(yong)(yong)變(bian)(bian)(bian)頻(pin)節(jie)(jie)能(neng)裝置后(hou)，利用(yong)(yong)變(bian)(bian)(bian)頻(pin)器(qi)的(de)(de)(de)(de)(de)軟啟動(dong)(dong)(dong)功(gong)(gong)(gong)(gong)能(neng)將使(shi)(shi)啟動(dong)(dong)(dong)電(dian)(dian)(dian)流從零開始，至(zhi)大值也不(bu)超過額(e)定電(dian)(dian)(dian)流，減輕(qing)了(le)(le)對電(dian)(dian)(dian)網(wang)(wang)的(de)(de)(de)(de)(de)沖擊和(he)(he)對供電(dian)(dian)(dian)容(rong)(rong)量的(de)(de)(de)(de)(de)要求，延長了(le)(le)設備(bei)和(he)(he)閥門的(de)(de)(de)(de)(de)使(shi)(shi)用(yong)(yong)壽(shou)命(ming)。節(jie)(jie)省了(le)(le)設備(bei)的(de)(de)(de)(de)(de)維護費用(yong)(yong)。變(bian)(bian)(bian)頻(pin)器(qi)功(gong)(gong)(gong)(gong)率(lv)因(yin)數(shu)補(bu)償節(jie)(jie)能(neng)：無功(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)率(lv)不(bu)但增(zeng)加線損(sun)和(he)(he)設備(bei)的(de)(de)(de)(de)(de)發熱，更主要的(de)(de)(de)(de)(de)是功(gong)(gong)(gong)(gong)率(lv)因(yin)數(shu)的(de)(de)(de)(de)(de)降低導致電(dian)(dian)(dian)網(wang)(wang)有(you)功(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)率(lv)的(de)(de)(de)(de)(de)降低，大量的(de)(de)(de)(de)(de)無功(gong)(gong)(gong)(gong)電(dian)(dian)(dian)能(neng)消耗(hao)在(zai)線路當中，設備(bei)使(shi)(shi)用(yong)(yong)效率(lv)低下，浪(lang)費嚴重，使(shi)(shi)用(yong)(yong)變(bian)(bian)(bian)頻(pin)調速裝置后(hou)，由于變(bian)(bian)(bian)頻(pin)器(qi)內部濾波電(dian)(dian)(dian)容(rong)(rong)的(de)(de)(de)(de)(de)作用(yong)(yong)，從而減少了(le)(le)無功(gong)(gong)(gong)(gong)損(sun)耗(hao)，增(zeng)加了(le)(le)電(dian)(dian)(dian)網(wang)(wang)的(de)(de)(de)(de)(de)有(you)功(gong)(gong)(gong)(gong)功(gong)(gong)(gong)(gong)率(lv)。減少電(dian)(dian)(dian)磁噪聲和(he)(he)損(sun)耗(hao)，在(zai)變(bian)(bian)(bian)頻(pin)器(qi)輸(shu)出側可設置輸(shu)出濾波器(qi)。

有(you)的(de)(de)(de)(de)(de)現場使用變(bian)(bian)頻(pin)(pin)器(qi)(qi)控(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)會(hui)(hui)出現漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)問題，漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)有(you)幾十伏(fu)到200伏(fu)不等，在這里針對此故障的(de)(de)(de)(de)(de)原因(yin)進行(xing)理(li)論(lun)的(de)(de)(de)(de)(de)分析。我們都知(zhi)道電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)的(de)(de)(de)(de)(de)三(san)相定子繞組(zu)流(liu)過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)產生(sheng)(sheng)旋轉磁場，根據磁電(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)應(ying)的(de)(de)(de)(de)(de)原理(li)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)的(de)(de)(de)(de)(de)外殼就(jiu)會(hui)(hui)產生(sheng)(sheng)感(gan)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)，此電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)(de)(de)(de)大(da)小就(jiu)取決于變(bian)(bian)頻(pin)(pin)器(qi)(qi)IGBT的(de)(de)(de)(de)(de)開(kai)關(guan)(guan)頻(pin)(pin)率(lv)的(de)(de)(de)(de)(de)大(da)小，由于高(gao)(gao)(gao)性能的(de)(de)(de)(de)(de)控(kong)(kong)制(zhi)(zhi)(zhi)要求高(gao)(gao)(gao)的(de)(de)(de)(de)(de)開(kai)關(guan)(guan)頻(pin)(pin)率(lv)，其開(kai)關(guan)(guan)速度很快(kuai)，則DV/DT偏大(da)，同(tong)時這個感(gan)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)就(jiu)偏大(da)，人觸(chu)摸(mo)上就(jiu)有(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)擊(ji)的(de)(de)(de)(de)(de)感(gan)覺(jue)。理(li)論(lun)上IGBT的(de)(de)(de)(de)(de)開(kai)關(guan)(guan)速度越(yue)快(kuai)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)外殼上的(de)(de)(de)(de)(de)感(gan)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)就(jiu)越(yue)高(gao)(gao)(gao)，而變(bian)(bian)頻(pin)(pin)器(qi)(qi)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)(de)(de)控(kong)(kong)制(zhi)(zhi)(zhi)精度和響(xiang)應(ying)就(jiu)越(yue)高(gao)(gao)(gao)，人觸(chu)摸(mo)之(zhi)后被電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)感(gan)覺(jue)就(jiu)越(yue)高(gao)(gao)(gao)，反之(zhi)，IGBT的(de)(de)(de)(de)(de)開(kai)關(guan)(guan)頻(pin)(pin)率(lv)慢(man)，感(gan)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)就(jiu)小，人觸(chu)摸(mo)的(de)(de)(de)(de)(de)感(gan)覺(jue)就(jiu)小，所以國內的(de)(de)(de)(de)(de)低(di)(di)端(duan)變(bian)(bian)頻(pin)(pin)器(qi)(qi)設計(ji)的(de)(de)(de)(de)(de)開(kai)關(guan)(guan)頻(pin)(pin)率(lv)偏低(di)(di)，控(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)后感(gan)應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)小，人摸(mo)上沒啥(sha)感(gan)覺(jue)，但(dan)其控(kong)(kong)制(zhi)(zhi)(zhi)性較差，動(dong)態(tai)響(xiang)應(ying)較慢(man)。變(bian)(bian)頻(pin)(pin)器(qi)(qi)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)抗器(qi)(qi)減小輸入電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)(de)高(gao)(gao)(gao)次諧(xie)波干擾(rao)，提高(gao)(gao)(gao)輸入電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)(de)功(gong)率(lv)因(yin)數。蘇州220kw變(bian)(bian)頻(pin)(pin)器(qi)(qi)價格

不要在變頻器(qi)的輸出端安(an)裝電源電容、抑制器(qi)和無線(xian)電噪(zao)聲濾波器(qi)。浙江工程(cheng)變頻器(qi)供貨公司

電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機使用(yong)(yong)變(bian)(bian)(bian)(bian)(bian)(bian)頻器(qi)的(de)作(zuo)用(yong)(yong)就(jiu)是(shi)為(wei)了調速， 并(bing)降低啟動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。 為(wei)了產生(sheng)可(ke)變(bian)(bian)(bian)(bian)(bian)(bian)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓和頻率(lv)，該設備首(shou)先(xian)要(yao)把電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的(de)交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)變(bian)(bian)(bian)(bian)(bian)(bian)換為(wei)直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian) (DC) ，這個過(guo)程叫整流(liu)(liu)。把直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian) (DC) 變(bian)(bian)(bian)(bian)(bian)(bian)換為(wei)交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian) (AC) 的(de)裝(zhuang)置(zhi)，其科學(xue)術語為(wei) “inverter 逆變(bian)(bian)(bian)(bian)(bian)(bian)器(qi) ”( )。一般逆變(bian)(bian)(bian)(bian)(bian)(bian)器(qi)是(shi)把直(zhi)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)逆變(bian)(bian)(bian)(bian)(bian)(bian)為(wei)一定(ding)(ding)的(de)固(gu)定(ding)(ding)頻率(lv)和一定(ding)(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)逆變(bian)(bian)(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)。對于逆變(bian)(bian)(bian)(bian)(bian)(bian)為(wei)頻率(lv)可(ke)調、 電(dian)(dian)(dian)(dian)(dian)(dian)壓可(ke)調的(de)逆變(bian)(bian)(bian)(bian)(bian)(bian)器(qi)我們(men)稱為(wei)變(bian)(bian)(bian)(bian)(bian)(bian)頻器(qi)。變(bian)(bian)(bian)(bian)(bian)(bian)頻器(qi)輸出(chu)的(de)波(bo)(bo)形是(shi)模(mo)擬正弦波(bo)(bo)， 主要(yao)是(shi)用(yong)(yong)在三相異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機調速用(yong)(yong)， 又(you)叫變(bian)(bian)(bian)(bian)(bian)(bian)頻調速器(qi)。浙(zhe)江工程變(bian)(bian)(bian)(bian)(bian)(bian)頻器(qi)供貨公司