作者:中輝電器 來源:www.shenzhentuliao.cn 發布時間:2019/4/30 11:35:27
影響電磁加熱器加熱效果的3個因素:
1、電(dian)磁加熱(re)器(qi)主機(ji)放置的距離。般情況下(xia),我們廠家(jia)都會建議放在5米以內,這樣加熱(re)效果才會更好。
2、加(jia)(jia)熱(re)的介質。目前(qian)大多數的工業加(jia)(jia)熱(re)設備對于(yu)所加(jia)(jia)熱(re)的介質還是(shi)有定(ding)的要求的,好是(shi)可以(yi)直接加(jia)(jia)熱(re)的,例(li)如鐵質、碳(tan)鋼(gang)(gang)材(cai)質。對于(yu)直接加(jia)(jia)熱(re)不銹鋼(gang)(gang)材(cai)質的管道或者容器還是(shi)有定(ding)的困難。不過(guo)電(dian)磁掌握電(dian)磁加(jia)(jia)熱(re)核心技術,能夠(gou)直接加(jia)(jia)熱(re)304、316等3系列,并且擁(yong)有豐富的應用案例(li),直接加(jia)(jia)熱(re)不銹鋼(gang)(gang)的技術行業先。
3、加熱的距(ju)(ju)離(li)(li)(li)。被加熱體與電(dian)(dian)磁(ci)(ci)加熱線圈的距(ju)(ju)離(li)(li)(li),正常來說,對于220V、5KW的電(dian)(dian)磁(ci)(ci)加熱控(kong)制板(ban)以(yi)及以(yi)下功率兩者間的距(ju)(ju)離(li)(li)(li)好(hao)相隔(ge)1.5-2公分;380V、5KW電(dian)(dian)磁(ci)(ci)加熱設備距(ju)(ju)離(li)(li)(li)好(hao)相隔(ge)2-3公分。這(zhe)個距(ju)(ju)離(li)(li)(li)我們廠家都是利用保溫棉代替,既避免了隔(ge)空(kong),又(you)避免熱量損(sun)失(shi),所以(yi)客戶無(wu)需擔心(xin)隔(ge)空(kong)問題。
影響電磁加熱(re)器的(de)加熱(re)效(xiao)率的(de)3個因素:
1、電磁加(jia)熱設備主機放置的距離(li)有(you)關:般情況(kuang)下,廠家都(dou)會(hui)建(jian)議(yi)放在5米以內,這樣加(jia)熱效果(guo)才會(hui)更好。
2、與被加(jia)(jia)熱(re)(re)的(de)(de)物體材料有關(guan):目(mu)前大(da)多(duo)數(shu)的(de)(de)工業(ye)加(jia)(jia)熱(re)(re)設備(bei)對于(yu)所(suo)加(jia)(jia)熱(re)(re)的(de)(de)介質還是(shi)(shi)(shi)有定(ding)的(de)(de)要求的(de)(de),好是(shi)(shi)(shi)可以直(zhi)(zhi)接加(jia)(jia)熱(re)(re)的(de)(de),例(li)如鐵質、碳鋼(gang)材質。對于(yu)直(zhi)(zhi)接加(jia)(jia)熱(re)(re)不(bu)銹鋼(gang)材質的(de)(de)管道或者容器還是(shi)(shi)(shi)有定(ding)的(de)(de)困難。不(bu)過電(dian)磁掌握電(dian)磁加(jia)(jia)熱(re)(re)核心(xin)技術,能夠直(zhi)(zhi)接加(jia)(jia)熱(re)(re)304、316等(deng)3系(xi)列,并且擁有豐富的(de)(de)應用案例(li),直(zhi)(zhi)接加(jia)(jia)熱(re)(re)不(bu)銹鋼(gang)的(de)(de)技術行(xing)業(ye)先。
3、與(yu)加(jia)(jia)熱的(de)距(ju)(ju)(ju)離(li)有關:被(bei)加(jia)(jia)熱體與(yu)電磁(ci)加(jia)(jia)熱線圈的(de)距(ju)(ju)(ju)離(li),正常來說,對于220V、5KW的(de)電磁(ci)加(jia)(jia)熱控制板(ban)以(yi)及(ji)以(yi)下功率兩者間(jian)的(de)距(ju)(ju)(ju)離(li)好相(xiang)隔1.5-2公(gong)分;380V、5KW電磁(ci)加(jia)(jia)熱設(she)備距(ju)(ju)(ju)離(li)好相(xiang)隔2-3公(gong)分。這個距(ju)(ju)(ju)離(li)廠家都(dou)是(shi)利(li)用保溫棉代(dai)替,既(ji)避免了隔空(kong),又避免熱量損失,所以(yi)客戶無需(xu)擔心隔空(kong)問(wen)題(ti)。
電(dian)磁(ci)感應加熱器應用超(chao)溫怎么辦:
1、熱電偶接頭兩端可以(yi)并個102P瓷片電容以(yi)消除高頻(pin)干擾。
2、檢查下炮筒(tong)接地(di)是否良好?嘗試炮筒(tong)強制接地(di)處理。
3、可以把線圈遠(yuan)離下熱電偶,減小干擾。
4、嘗試下用高溫布把熱電偶包住(zhu),讓它不(bu)要與(yu)炮(pao)筒接觸。
5、嘗試換條(tiao)新的熱(re)電偶。
6、嘗試下注(zhu)塑機控制電腦中心加(jia)個(ge)Pai型慮波器,減小電源干擾(rao)。
電(dian)(dian)(dian)磁加(jia)(jia)(jia)熱(re)器(qi)的(de)(de)(de)溫度升不(bu)上(shang)去該怎么辦?第二種解(jie)決方法:當造(zao)粒機類似于(yu)大功(gong)率(lv)(lv)時,安裝電(dian)(dian)(dian)磁加(jia)(jia)(jia)熱(re)器(qi)后,溫度總(zong)達(da)不(bu)到(dao)(dao)。而且電(dian)(dian)(dian)磁加(jia)(jia)(jia)熱(re)器(qi)也(ye)直(zhi)在工(gong)作,電(dian)(dian)(dian)流也(ye)正常,但是(shi)(shi)(shi)溫度總(zong)上(shang)不(bu)去,般這(zhe)種情況是(shi)(shi)(shi)功(gong)率(lv)(lv)不(bu)夠(gou)大。目前是(shi)(shi)(shi)市面上(shang)的(de)(de)(de)些(xie)中間商用40kw貼個子就說是(shi)(shi)(shi)60kw電(dian)(dian)(dian)磁加(jia)(jia)(jia)熱(re)器(qi)的(de)(de)(de)事(shi)件(jian)見過許多,我們可(ke)以通過電(dian)(dian)(dian)流確(que)定下功(gong)率(lv)(lv)到(dao)(dao)底是(shi)(shi)(shi)多少,如果確(que)定是(shi)(shi)(shi)實際功(gong)率(lv)(lv)太小了,可(ke)以加(jia)(jia)(jia)大實際功(gong)率(lv)(lv)來(lai)實現。要(yao)是(shi)(shi)(shi)確(que)定實際功(gong)率(lv)(lv)不(bu)小了,這(zhe)是(shi)(shi)(shi)由炮筒的(de)(de)(de)材料引起來(lai)的(de)(de)(de),不(bu)同(tong)(tong)材質在不(bu)同(tong)(tong)的(de)(de)(de)工(gong)作頻(pin)率(lv)(lv)時吸收(shou)熱(re)量(liang)也(ye)不(bu)同(tong)(tong)。應該是(shi)(shi)(shi)嘗試(shi)增加(jia)(jia)(jia)諧振電(dian)(dian)(dian)容容量(liang),讓Q值增加(jia)(jia)(jia),提高線圈高頻(pin)電(dian)(dian)(dian)流。可(ke)以使炮筒內外溫度均勻的(de)(de)(de)來(lai)達(da)到(dao)(dao)提高炮筒的(de)(de)(de)溫度。如果各個方面的(de)(de)(de)條件(jian)可(ke)以的(de)(de)(de)話,可(ke)以試(shi)著(zhu)去換掉(diao)炮筒試(shi)試(shi)。
電(dian)(dian)(dian)磁(ci)加(jia)熱(re)和(he)傳(chuan)統電(dian)(dian)(dian)阻(zu)加(jia)熱(re)對(dui)比:傳(chuan)統電(dian)(dian)(dian)阻(zu)加(jia)熱(re)熱(re)損失大(da)(da)(da):現(xian)(xian)有企業專用的(de)(de)加(jia)熱(re)方式,是(shi)由(you)電(dian)(dian)(dian)阻(zu)絲繞制,圈(quan)的(de)(de)內(nei)外(wai)雙面發熱(re),其內(nei)面(緊貼料(liao)(liao)筒部分(fen))的(de)(de)熱(re)傳(chuan)導到(dao)料(liao)(liao)筒上,而外(wai)面的(de)(de)熱(re)量(liang)大(da)(da)(da)部分(fen)散(san)失到(dao)空(kong)氣(qi)中,造成(cheng)電(dian)(dian)(dian)能(neng)的(de)(de)直接損失、浪費(fei)。環(huan)境(jing)溫度(du)(du)(du)上升: 由(you)于(yu)熱(re)量(liang)大(da)(da)(da)量(liang)散(san)失,周圍環(huan)境(jing)溫度(du)(du)(du)升高(gao),尤(you)其是(shi)夏天(tian)對(dui)生產環(huan)境(jing)影響很大(da)(da)(da),現(xian)(xian)場工作溫度(du)(du)(du)有的(de)(de)已經超過(guo)了45度(du)(du)(du),有些企業不(bu)得不(bu)采用空(kong)調(diao)降低溫度(du)(du)(du),這又造成(cheng)能(neng)源(yuan)的(de)(de)二次浪費(fei)。使(shi)(shi)用壽命短、維(wei)(wei)修量(liang)大(da)(da)(da): 電(dian)(dian)(dian)熱(re)管由(you)于(yu)采用電(dian)(dian)(dian)阻(zu)絲發熱(re),其加(jia)熱(re)溫度(du)(du)(du)高(gao)達300度(du)(du)(du)左右,熱(re)滯后較(jiao)大(da)(da)(da),不(bu)易精確(que)控溫,電(dian)(dian)(dian)阻(zu)絲容易因高(gao)溫老化而燒斷。常用電(dian)(dian)(dian)熱(re)圈(quan)使(shi)(shi)用壽命約半年,因此,維(wei)(wei)修的(de)(de)工作量(liang)相對(dui)較(jiao)大(da)(da)(da)。
電磁(ci)加(jia)熱器用薄(bo)膜電容的要(yao)求和注意(yi)事(shi)項:
1、耐壓(ya)(ya)選(xuan)(xuan)擇(ze)不當:例如(ru)(ru),交流輸入端,380V的(de)(de)線電(dian)(dian)壓(ya)(ya),EMI電(dian)(dian)路用(yong)的(de)(de)電(dian)(dian)容器,三角(jiao)形接法,部分工(gong)程師選(xuan)(xuan)擇(ze)MKP-X2 275V.AC (這會導(dao)致電(dian)(dian)容擊(ji)穿)。例如(ru)(ru),LC諧(xie)振回路,很多工(gong)程師以為半橋諧(xie)振電(dian)(dian)容,耐壓(ya)(ya)只是直流母線537V的(de)(de)半即可(實際上這是嚴重錯誤的(de)(de))。國內的(de)(de)機芯,有使(shi)用(yong)的(de)(de)薄膜電(dian)(dian)容器耐壓(ya)(ya)等(deng)1200V 1600V 2000V 2500V 3000V 4000V 需要(yao)根據自己的(de)(de)實際電(dian)(dian)路來選(xuan)(xuan)擇(ze)。正確(que)的(de)(de)方式是用(yong)示波器加高壓(ya)(ya)探頭(tou),實際測(ce)量下機芯在大(da)功率的(de)(de)時候,諧(xie)振電(dian)(dian)壓(ya)(ya)的(de)(de)波形。
2、電(dian)(dian)流(liu)選擇不當:很多企業的(de)工(gong)(gong)程師,研發(fa)人員,對于直流(liu)母(mu)線(xian)支(zhi)撐電(dian)(dian)容器,LC諧(xie)振(zhen)電(dian)(dian)容器,電(dian)(dian)容器的(de)電(dian)(dian)流(liu)方面根本就(jiu)沒經(jing)過(guo)具體計算和實際測(ce)(ce)量,造成電(dian)(dian)容器工(gong)(gong)作(zuo)溫度(du)非常(chang)高,大大縮(suo)短(duan)薄膜(mo)電(dian)(dian)容器的(de)使用(yong)壽命,嚴重的(de)出(chu)現短(duan)時(shi)間(jian)就(jiu)炸掉(diao)電(dian)(dian)容器了。正(zheng)確的(de)方式(shi),就(jiu)是用(yong)電(dian)(dian)流(liu)互感器測(ce)(ce)量下諧(xie)振(zhen)回路的(de)電(dian)(dian)流(liu)值(zhi),還有通(tong)過(guo)機子在(zai)老化(hua)的(de)時(shi)候(hou)測(ce)(ce)測(ce)(ce)電(dian)(dian)容器的(de)溫升是否正(zheng)常(chang)。
3、接線方式不(bu)(bu)當:在設計電(dian)磁(ci)加熱機芯的(de)時(shi)候(hou),很多(duo)情況下需要多(duo)個(ge)薄膜電(dian)容(rong)(rong)器(qi)并聯(lian)使用.并聯(lian)的(de)好(hao)處就是(shi)可以增加過流能力,降低溫升.但(dan)是(shi)并聯(lian)電(dian)路,大的(de)問(wen)題是(shi)過流不(bu)(bu)均.由于接線方式的(de)不(bu)(bu)當,往(wang)往(wang)造成并聯(lian)的(de)幾只(zhi)電(dian)容(rong)(rong)器(qi),某個(ge)位置的(de)電(dian)容(rong)(rong)器(qi)溫度(du)高,容(rong)(rong)易先壞掉。
電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)加熱(re)器(qi)(qi)(qi)(qi)(qi)工(gong)作原理:電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)加熱(re)是利(li)用電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)感應原理將(jiang)(jiang)電(dian)(dian)(dian)(dian)(dian)能(neng)轉(zhuan)換(huan)為(wei)(wei)熱(re)能(neng)的(de)(de)能(neng)量轉(zhuan)換(huan)過(guo)(guo)程,由(you)整流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)路(lu)將(jiang)(jiang)50/60Hz的(de)(de)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓轉(zhuan)變(bian)(bian)(bian)(bian)成直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓,再經過(guo)(guo)功(gong)率(lv)(lv)控制電(dian)(dian)(dian)(dian)(dian)路(lu)將(jiang)(jiang)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)壓轉(zhuan)換(huan)成頻(pin)率(lv)(lv)為(wei)(wei)20~40kHz的(de)(de)高(gao)頻(pin)電(dian)(dian)(dian)(dian)(dian)壓,當(dang)高(gao)速變(bian)(bian)(bian)(bian)化(hua)的(de)(de)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)通過(guo)(guo)線(xian)圈(quan)時(shi),線(xian)圈(quan)會產生高(gao)速變(bian)(bian)(bian)(bian)化(hua)的(de)(de)磁(ci)(ci)場(chang)(chang),磁(ci)(ci)場(chang)(chang)內的(de)(de)交(jiao)變(bian)(bian)(bian)(bian)磁(ci)(ci)力線(xian)通過(guo)(guo)金屬管(guan)(guan)(guan)道時(shi)(導磁(ci)(ci)、導電(dian)(dian)(dian)(dian)(dian)材料),管(guan)(guan)(guan)壁體(ti)(ti)內產生無數的(de)(de)小渦流(liu)(liu)(liu),使輸油管(guan)(guan)(guan)道的(de)(de)管(guan)(guan)(guan)壁本身自(zi)行發熱(re)與(yu)原油進(jin)行熱(re)交(jiao)換(huan),達到加熱(re)原油的(de)(de)目的(de)(de)。變(bian)(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)(qi)是高(gao)頻(pin)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)加熱(re)器(qi)(qi)(qi)(qi)(qi)的(de)(de)核(he)心部(bu)件(jian),是利(li)用電(dian)(dian)(dian)(dian)(dian)力半導體(ti)(ti)器(qi)(qi)(qi)(qi)(qi)件(jian)的(de)(de)通斷(duan)作用將(jiang)(jiang)工(gong)頻(pin)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)變(bian)(bian)(bian)(bian)換(huan)為(wei)(wei)另頻(pin)率(lv)(lv)的(de)(de)電(dian)(dian)(dian)(dian)(dian)能(neng)控制裝置(zhi)。目前使用的(de)(de)變(bian)(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)(qi)主要采用交(jiao)流(liu)(liu)(liu)—直(zhi)流(liu)(liu)(liu)—交(jiao)流(liu)(liu)(liu)方式(shi)(shi),先把(ba)工(gong)頻(pin)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)通過(guo)(guo)整流(liu)(liu)(liu)器(qi)(qi)(qi)(qi)(qi)轉(zhuan)換(huan)成直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan),然后再把(ba)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)轉(zhuan)換(huan)成頻(pin)率(lv)(lv)、電(dian)(dian)(dian)(dian)(dian)壓均可控制的(de)(de)交(jiao)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)供給電(dian)(dian)(dian)(dian)(dian)動機。變(bian)(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)(qi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)路(lu)般由(you)整流(liu)(liu)(liu)、中間直(zhi)流(liu)(liu)(liu)環節、逆(ni)變(bian)(bian)(bian)(bian)和控制4個部(bu)分(fen)組成。整流(liu)(liu)(liu)部(bu)分(fen)為(wei)(wei)三相橋式(shi)(shi)不可控整流(liu)(liu)(liu)器(qi)(qi)(qi)(qi)(qi),逆(ni)變(bian)(bian)(bian)(bian)部(bu)分(fen)為(wei)(wei)IGBT三相橋式(shi)(shi)逆(ni)變(bian)(bian)(bian)(bian)器(qi)(qi)(qi)(qi)(qi)且輸出為(wei)(wei)PWM波形,中間直(zhi)流(liu)(liu)(liu)環節為(wei)(wei)濾(lv)波、直(zhi)流(liu)(liu)(liu)儲能(neng)和緩沖無功(gong)功(gong)率(lv)(lv)。
電磁加熱器應用范圍:
1、塑(su)(su)料橡膠行業(ye),如:塑(su)(su)料用(yong)吹(chui)膜機(ji)、拉絲機(ji)、注塑(su)(su)機(ji),造(zao)粒機(ji),橡膠用(yong)擠出機(ji)、硫化機(ji)、電纜生產擠出機(ji)等(deng)。
2、醫藥(yao)化(hua)工行業,如:醫藥(yao)專用輸液袋、塑料器材生(sheng)產線,化(hua)工行業液體加熱輸送管道等等。
3、能源(yuan)、食品(pin)行業(ye),如:原油輸送管(guan)道(dao)的加熱;食品(pin)機械,如:超貨機等(deng)需要電加熱的設(she)備。
4、大功率商用電磁(ci)灶機芯。
5、建材(cai)(cai)行業,如:燃氣(qi)管(guan)生產(chan)線(xian)(xian)、塑料管(guan)材(cai)(cai)生產(chan)線(xian)(xian)、PE塑料硬(ying)質平網(wang)、土工(gong)網(wang)機組、自動中(zhong)空成型機、PE蜂窩板生產(chan)線(xian)(xian)、單雙(shuang)壁波紋(wen)管(guan)擠(ji)出生產(chan)線(xian)(xian)、復合氣(qi)墊膜(mo)機組、PVC硬(ying)管(guan)、芯層發泡管(guan)生產(chan)線(xian)(xian)、PP擠(ji)出透明片材(cai)(cai)生產(chan)線(xian)(xian)、擠(ji)出聚苯(ben)乙烯(xi)發泡管(guan)材(cai)(cai)、PE纏繞膜(mo)機組。
6、印刷設備里的干燥加熱。
7、其它類似(si)行業(ye)加熱。
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