電(dian)磁(ci)加(jia)熱對(dui)比(bi)其(qi)他幾種(zhong)加(jia)熱方式(shi)：

、燃(ran)(ran)(ran)(ran)燒(shao)(shao)式(shi)(shi)加(jia)熱：顧名思(si)義(yi)就是通過(guo)燃(ran)(ran)(ran)(ran)料燃(ran)(ran)(ran)(ran)燒(shao)(shao)來實(shi)現熱量(liang)傳輸了(le)，這(zhe)是原始(shi)的(de)加(jia)熱方(fang)式(shi)(shi)，燃(ran)(ran)(ran)(ran)煤加(jia)熱、燃(ran)(ran)(ran)(ran)氣(qi)加(jia)熱、生物質燃(ran)(ran)(ran)(ran)燒(shao)(shao)加(jia)熱等等是常(chang)見的(de)，其中燃(ran)(ran)(ran)(ran)燒(shao)(shao)加(jia)熱所(suo)造成(cheng)的(de)嚴重，所(suo)以出于對(dui)環保的(de)問題，許多地(di)區都(dou)(dou)實(shi)行了(le)禁煤令。不管哪種燃(ran)(ran)(ran)(ran)燒(shao)(shao)發(fa)熱方(fang)式(shi)(shi)，都(dou)(dou)會(hui)對(dui)空氣(qi)有排放，氧化碳(tan)、灰(hui)塵、硫化氣(qi)體(ti)、殘渣等等，而且熱效率也非常(chang)低。

二、接觸(chu)式(shi)(shi)加(jia)(jia)(jia)熱：這(zhe)種(zhong)加(jia)(jia)(jia)熱方(fang)式(shi)(shi)普遍的(de)(de)是(shi)電(dian)阻絲、電(dian)熱棒的(de)(de)形式(shi)(shi)，加(jia)(jia)(jia)熱液(ye)體的(de)(de)時候是(shi)直接與液(ye)體接觸(chu)，這(zhe)種(zhong)加(jia)(jia)(jia)熱方(fang)式(shi)(shi)有局限性(xing)，就是(shi)加(jia)(jia)(jia)熱溫度般是(shi)300℃以下，加(jia)(jia)(jia)熱時間(jian)長了會產生(sheng)(sheng)污(wu)垢(gou)，時間(jian)長了就會形成管(guan)道破裂問(wen)題，再有就是(shi)接觸(chu)式(shi)(shi)容易產生(sheng)(sheng)漏電(dian)觸(chu)電(dian)問(wen)題，對(dui)人身安(an)全有危害，所以對(dui)電(dian)熱管(guan)的(de)(de)質量要求是(shi)的(de)(de)；另外(wai)電(dian)熱管(guan)的(de)(de)熱效(xiao)雖然比(bi)燃(ran)煤燃(ran)氣的(de)(de)要高引(yin)動，但對(dui)外(wai)還是(shi)部分熱量散失在(zai)空氣中。

三(san)、電磁(ci)感(gan)應加(jia)熱(re)(re)(re)：電磁(ci)加(jia)熱(re)(re)(re)器是屬(shu)于非接觸式加(jia)熱(re)(re)(re)方(fang)(fang)(fang)式，其應用的(de)工作(zuo)原(yuan)理(li)和電磁(ci)爐加(jia)熱(re)(re)(re)原(yuan)理(li)樣，通過(guo)電磁(ci)感(gan)應技術(shu)，利用磁(ci)變，使(shi)得金屬(shu)料筒自身(shen)產生渦流，達到(dao)(dao)自身(shen)產生熱(re)(re)(re)量，從而實現加(jia)熱(re)(re)(re)目的(de)，這樣的(de)技術(shu)原(yuan)理(li)大(da)程序的(de)實現了對熱(re)(re)(re)效的(de)全部利用，熱(re)(re)(re)效率高(gao)能(neng)達到(dao)(dao)98%，是目前熱(re)(re)(re)利用高(gao)的(de)加(jia)熱(re)(re)(re)方(fang)(fang)(fang)式，非接觸式的(de)加(jia)熱(re)(re)(re)方(fang)(fang)(fang)式對安(an)全問題方(fang)(fang)(fang)面(mian)得到(dao)(dao)了保障(zhang)，而且使(shi)用壽(shou)命長(chang)，后期(qi)維護簡便(bian)，成本低，重(zhong)要的(de)是它能(neng)夠實現高(gao)溫加(jia)熱(re)(re)(re)，廣(guang)泛(fan)適應工業應用，屬(shu)于很好的(de)節能(neng)方(fang)(fang)(fang)式。

哪些因素會導致電(dian)磁加(jia)熱器發(fa)生故障？

：電(dian)(dian)磁加(jia)熱(re)器電(dian)(dian)路(lu)(lu)設(she)計不科學(xue)。目前(qian)，在大(da)功率電(dian)(dian)磁加(jia)熱(re)電(dian)(dian)路(lu)(lu)系統(tong)中，大(da)部分廠家采用(yong)過去的(de)(de)傳統(tong)模擬(ni)3525或494電(dian)(dian)路(lu)(lu)，產(chan)生(sheng)兩路(lu)(lu)或四路(lu)(lu)PWM，采用(yong)調頻方(fang)法驅動(dong)IGBT，改變(bian)諧振回電(dian)(dian)流大(da)小來達到調節功率大(da)小的(de)(de)目的(de)(de)，再(zai)采用(yong)4046進行鎖相(xiang)控(kong)制，在工(gong)業上加(jia)熱(re)應用(yong)已經很普遍(bian)，技術(shu)也(ye)比較成(cheng)熟。但是，它的(de)(de)硬件(jian)電(dian)(dian)路(lu)(lu)復雜(za)，所(suo)以(yi)大(da)多(duo)體積龐大(da)，也(ye)不便(bian)于生(sheng)產(chan)和(he)調試，特(te)別是容(rong)(rong)(rong)易(yi)由于所(suo)選用(yong)的(de)(de)器件(jian)特(te)性差異，致使電(dian)(dian)源致性差，工(gong)作(zuo)中生(sheng)產(chan)的(de)(de)高強(qiang)的(de)(de)電(dian)(dian)磁干擾(rao)時，鎖相(xiang)或保護部分容(rong)(rong)(rong)易(yi)失(shi)靈，容(rong)(rong)(rong)易(yi)造(zao)成(cheng)故障。

二：電(dian)(dian)力器件布局不(bu)合(he)(he)(he)(he)理(li)。在大(da)功率(lv)(lv)(lv)工(gong)業電(dian)(dian)磁加熱(re)主結構電(dian)(dian)路(lu)中，常為(wei)(wei)半(ban)(ban)橋(qiao)(qiao)電(dian)(dian)路(lu)和全橋(qiao)(qiao)電(dian)(dian)路(lu)，通常2-25KW功率(lv)(lv)(lv)別采用(yong)半(ban)(ban)橋(qiao)(qiao)電(dian)(dian)路(lu)，全橋(qiao)(qiao)電(dian)(dian)路(lu)可以實(shi)現20KW以上功率(lv)(lv)(lv)。般地，功率(lv)(lv)(lv)大(da)于25KW后，線(xian)圈的高(gao)頻電(dian)(dian)流比(bi)較大(da)，發熱(re)比(bi)較多，當主電(dian)(dian)路(lu)電(dian)(dian)力功率(lv)(lv)(lv)器件布局不(bu)合(he)(he)(he)(he)理(li)時，可能會產生高(gao)強干擾，有可能使(shi)慮(lv)波電(dian)(dian)容、揩振電(dian)(dian)容或(huo)IGBT模塊擊(ji)穿。為(wei)(wei)了用(yong)戶(hu)的安裝(zhuang)安全考(kao)慮(lv)，般把半(ban)(ban)橋(qiao)(qiao)電(dian)(dian)路(lu)大(da)功率(lv)(lv)(lv)定為(wei)(wei)15KW，降低IGBT模塊電(dian)(dian)流應力，當功率(lv)(lv)(lv)大(da)于20KW時，建議(yi)用(yong)戶(hu)選擇全橋(qiao)(qiao)主電(dian)(dian)路(lu)結構。當然，在特定的應用(yong)場合(he)(he)(he)(he)，需(xu)要加熱(re)面積比(bi)小，功率(lv)(lv)(lv)密度比(bi)較大(da)時，我們合(he)(he)(he)(he)理(li)科學(xue)地可以幫助用(yong)戶(hu)把半(ban)(ban)橋(qiao)(qiao)電(dian)(dian)路(lu)安全做(zuo)到(dao)30KW。

電(dian)磁加熱(re)器的六種調節(jie)功率方式：

1、調頻法。

2、間隙加熱法。

3、移(yi)相脈(mo)寬調制法（全橋移(yi)相PWM控制）。

4、改(gai)變整流電壓(ya)法。

5、脈沖(chong)功率輸出變壓器初抽(chou)頭切換法。

6、變壓(ya)器初抽(chou)頭(tou)切換、調頻、調壓(ya)法。

電(dian)(dian)磁加(jia)熱器的(de)(de)(de)前景(jing)(jing)：當前世(shi)界經濟不景(jing)(jing)氣，企(qi)業(ye)(ye)生(sheng)存壓力大，而(er)塑膠行(xing)業(ye)(ye)競爭(zheng)激烈。降(jiang)低生(sheng)產(chan)成本(ben)，提高(gao)產(chan)品(pin)的(de)(de)(de)競爭(zheng)力，是每個企(qi)業(ye)(ye)面臨的(de)(de)(de)個核心問題，而(er)電(dian)(dian)費(fei)在塑膠行(xing)業(ye)(ye)生(sheng)產(chan)成本(ben)中占有(you)(you)很(hen)大比(bi)例，塑料(liao)(liao)企(qi)業(ye)(ye)對(dui)于節省電(dian)(dian)費(fei)，降(jiang)低生(sheng)產(chan)成本(ben)自然(ran)非常(chang)關(guan)心。采用電(dian)(dian)磁加(jia)熱方(fang)式對(dui)于塑料(liao)(liao)機(ji)械來說，可(ke)以有(you)(you)明顯(xian)的(de)(de)(de)節電(dian)(dian)效果，而(er)且少(shao)可(ke)達到30%，有(you)(you)些原來熱效率不高(gao)的(de)(de)(de)機(ji)械更是可(ke)達到80%，也正(zheng)是鑒于這(zhe)點，引(yin)起范圍塑料(liao)(liao)企(qi)業(ye)(ye)和行(xing)業(ye)(ye)人士的(de)(de)(de)關(guan)注。

電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)工作(zuo)原(yuan)理(li)：電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)(jia)(jia)熱(re)(re)是(shi)利用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)感應原(yuan)理(li)將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)轉換(huan)(huan)為(wei)(wei)熱(re)(re)能(neng)(neng)的(de)(de)(de)能(neng)(neng)量(liang)轉換(huan)(huan)過(guo)程，由整流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)將(jiang)50/60Hz的(de)(de)(de)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)轉變(bian)(bian)(bian)(bian)(bian)成(cheng)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，再經過(guo)功(gong)(gong)率(lv)控(kong)(kong)制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)將(jiang)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)轉換(huan)(huan)成(cheng)頻(pin)(pin)(pin)率(lv)為(wei)(wei)20～40kHz的(de)(de)(de)高(gao)頻(pin)(pin)(pin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)，當高(gao)速變(bian)(bian)(bian)(bian)(bian)化的(de)(de)(de)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)通(tong)(tong)(tong)過(guo)線(xian)(xian)圈(quan)時，線(xian)(xian)圈(quan)會(hui)產生(sheng)高(gao)速變(bian)(bian)(bian)(bian)(bian)化的(de)(de)(de)磁(ci)(ci)(ci)場(chang)，磁(ci)(ci)(ci)場(chang)內的(de)(de)(de)交(jiao)(jiao)變(bian)(bian)(bian)(bian)(bian)磁(ci)(ci)(ci)力線(xian)(xian)通(tong)(tong)(tong)過(guo)金(jin)屬管道(dao)時（導(dao)磁(ci)(ci)(ci)、導(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)材(cai)料），管壁體內產生(sheng)無(wu)數的(de)(de)(de)小渦流(liu)(liu)(liu)(liu)(liu)(liu)(liu)，使輸油管道(dao)的(de)(de)(de)管壁本身自(zi)行(xing)發熱(re)(re)與原(yuan)油進(jin)行(xing)熱(re)(re)交(jiao)(jiao)換(huan)(huan)，達(da)到(dao)加(jia)(jia)(jia)熱(re)(re)原(yuan)油的(de)(de)(de)目(mu)的(de)(de)(de)。變(bian)(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)是(shi)高(gao)頻(pin)(pin)(pin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)(jia)(jia)熱(re)(re)器(qi)(qi)(qi)的(de)(de)(de)核心部(bu)(bu)件，是(shi)利用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力半導(dao)體器(qi)(qi)(qi)件的(de)(de)(de)通(tong)(tong)(tong)斷(duan)作(zuo)用(yong)(yong)(yong)將(jiang)工頻(pin)(pin)(pin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)變(bian)(bian)(bian)(bian)(bian)換(huan)(huan)為(wei)(wei)另頻(pin)(pin)(pin)率(lv)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)控(kong)(kong)制裝置。目(mu)前使用(yong)(yong)(yong)的(de)(de)(de)變(bian)(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)主(zhu)要采用(yong)(yong)(yong)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)—直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)—交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)方式，先把工頻(pin)(pin)(pin)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)通(tong)(tong)(tong)過(guo)整流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器(qi)(qi)(qi)轉換(huan)(huan)成(cheng)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，然后再把直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)轉換(huan)(huan)成(cheng)頻(pin)(pin)(pin)率(lv)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)均(jun)可控(kong)(kong)制的(de)(de)(de)交(jiao)(jiao)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)給(gei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動機。變(bian)(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)般由整流(liu)(liu)(liu)(liu)(liu)(liu)(liu)、中間直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)環(huan)節、逆變(bian)(bian)(bian)(bian)(bian)和控(kong)(kong)制4個部(bu)(bu)分(fen)組(zu)成(cheng)。整流(liu)(liu)(liu)(liu)(liu)(liu)(liu)部(bu)(bu)分(fen)為(wei)(wei)三相(xiang)(xiang)橋(qiao)式不可控(kong)(kong)整流(liu)(liu)(liu)(liu)(liu)(liu)(liu)器(qi)(qi)(qi)，逆變(bian)(bian)(bian)(bian)(bian)部(bu)(bu)分(fen)為(wei)(wei)IGBT三相(xiang)(xiang)橋(qiao)式逆變(bian)(bian)(bian)(bian)(bian)器(qi)(qi)(qi)且輸出為(wei)(wei)PWM波形，中間直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)環(huan)節為(wei)(wei)濾波、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)儲能(neng)(neng)和緩沖(chong)無(wu)功(gong)(gong)功(gong)(gong)率(lv)。

電(dian)磁(ci)感(gan)應加(jia)熱器(qi)應用(yong)超溫怎么辦：

1、熱電偶接頭兩(liang)端(duan)可以(yi)并(bing)個102P瓷片電容以(yi)消除高頻干擾。

2、檢(jian)查下炮筒(tong)接地(di)是否良好？嘗試炮筒(tong)強(qiang)制接地(di)處理。

3、可以把線(xian)圈遠離下熱電偶，減小干擾。

4、嘗試下用高(gao)溫布(bu)把熱(re)電偶包(bao)住，讓它不要(yao)與炮筒接觸。

5、嘗(chang)試換條新的熱電偶(ou)。

6、嘗試下注塑機控(kong)制電(dian)腦中心加(jia)個(ge)Pai型慮波器，減小電(dian)源(yuan)干擾。

電磁加熱節電分析：電磁加熱器在塑料機械上節能(neng)30%-70%是怎么來(lai)的？

1、相比(bi)電(dian)阻加熱，電(dian)磁加熱器多了層保溫層，熱能利用率增加。

2、相(xiang)比(bi)電阻加(jia)熱，電磁(ci)加(jia)熱器直接(jie)作用(yong)于(yu)料管加(jia)熱，減少了熱傳(chuan)遞熱能損耗。

3、相比電阻加(jia)熱，電磁加(jia)熱器的加(jia)熱速(su)度要快四分以(yi)上(shang)，減少了加(jia)熱時(shi)間。

4、相比電(dian)阻加(jia)熱，電(dian)磁加(jia)熱器的加(jia)熱速度快，生產效率(lv)就提高了，讓電(dian)機處(chu)在飽和狀態，使其減少了，高功率(lv)低需求造成的電(dian)能損耗。

電磁加熱器多溫區控制就是有兩(liang)種：

種：是臺電磁加熱(re)控制器控制多(duo)組線(xian)圈。

第二種:是臺設備(bei)使(shi)用(yong)(yong)多(duo)個電磁(ci)加(jia)熱(re)控制(zhi)器分別控制(zhi)多(duo)個線圈。現在例如注塑(su)機(ji)，拉絲機(ji)，吹膜機(ji)，擠出機(ji)等機(ji)械設備(bei)，料(liao)管(guan)加(jia)熱(re)部分都需要(yao)(yao)幾個不同溫(wen)度才能滿(man)足生產，這時候就要(yao)(yao)使(shi)用(yong)(yong)到電磁(ci)加(jia)熱(re)器多(duo)溫(wen)區來控制(zhi)。

第三種：臺電(dian)磁加(jia)熱控(kong)制器控(kong)制多組線圈比較(jiao)少用，因(yin)為如(ru)果主機旦出(chu)現故(gu)障，整(zheng)個(ge)幾個(ge)溫(wen)度都將無(wu)法加(jia)熱，影響正規(gui)生產，而且維(wei)護起(qi)來也(ye)是比較(jiao)麻煩的。

第四種(zhong)：多個電磁加(jia)熱(re)控制器分(fen)別控制獨立線圈，這(zhe)樣不(bu)但便于管理，而且加(jia)熱(re)非常均勻(yun)，維護起來也是十分(fen)方便的。