作(zuo)者:中輝電(dian)器 來源(yuan):www.shenzhentuliao.cn 發布時間:2019/4/30 13:32:45
電(dian)磁加熱(re)器的全橋和(he)半橋的投資成本與產品配(pei)置的異同(tong):
、相(xiang)同:在普通用途上,均可全系列配置(zhi)各種產品。
二、投資成本上不同:
1、全橋:因(yin)其(qi)設計配置較高(gao),無可(ke)避(bi)免生產成本較高(gao)。
2、半橋:因其設計配(pei)置(zhi)較低(di),生產(chan)成本較低(di)。
三、產品配置上:
1、全橋:成本合理和(he)負載耐用上(shang),配置30KW以上(shang)產(chan)品較宜。
2、半橋:成本合理上,配(pei)置30KW以下產品較宜。
電(dian)磁感應加熱(re)器不加熱(re)原(yuan)因主要有以下(xia)三點:
1、線路故障,沒(mei)電供(gong)及(ji)。
2、元件損壞,查找更(geng)換。
3、調整(zheng)不當(dang),重新調整(zheng)適當(dang)數據。
使用造粒機電(dian)磁(ci)加(jia)熱器(qi)時要(yao)知道的(de)常(chang)識:
1、我們(men)要把造粒機電磁加熱器安置在個牢固的平臺(tai)上(shang)或掛在設備(bei)上(shang),其附近不(bu)宜溫度過高,以防(fang)止散熱不(bu)好導致過熱保護。
2、不要(yao)將控(kong)制(zhi)器安裝在潮濕的環(huan)境(jing)中(zhong),防(fang)止水蒸汽進入電箱后,易在緣介質表面凝結,降低(di)其緣性能(neng),造成漏(lou)電事故。
3、外部(bu)電(dian)源(yuan)(yuan)在(zai)接入(ru)電(dian)磁加熱器(qi)前,應安(an)裝(zhuang)獨立的(de)電(dian)源(yuan)(yuan)空氣開關保(bao)護(hu)裝(zhuang)置。并(bing)將金屬外殼要(yao)可靠(kao)接地。在(zai)使用過程中,不(bu)要(yao)輕易拆除其接地導線,因為接地措施(shi)是防止觸電(dian)的(de)后道保(bao)護(hu)措施(shi)。
4、要定期清理散(san)熱(re)(re)器,保證產(chan)(chan)品通風良好。要經常(chang)檢查產(chan)(chan)品的進風口(kou)及(ji)散(san)熱(re)(re)風扇,防(fang)止進風口(kou)處堵塞或散(san)熱(re)(re)風扇卡死(si),避免因過熱(re)(re)停機保護。
電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)簡介:電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)也稱電(dian)(dian)(dian)(dian)磁(ci)感應加(jia)熱(re),即電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)(外文:Electromagnetic heating縮寫:EH)技術(shu),電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)的原理是通過(guo)電(dian)(dian)(dian)(dian)子(zi)線(xian)路板組成部分產生交變磁(ci)場(chang)、當用(yong)含鐵(tie)質容(rong)器(qi)放置上面(mian)時,容(rong)器(qi)表面(mian)即切割交變磁(ci)力線(xian)而在容(rong)器(qi)底部金屬(shu)部分產生交變的電(dian)(dian)(dian)(dian)流(即渦(wo)流),渦(wo)流使(shi)容(rong)器(qi)底部的載(zai)流子(zi)高(gao)速無規則運動(dong),載(zai)流子(zi)與原子(zi)互相碰撞(zhuang)、摩擦而產生熱(re)能。從(cong)而起到(dao)加(jia)熱(re)物品(pin)的效(xiao)果。因為是鐵(tie)制容(rong)器(qi)自身發熱(re),所以熱(re)轉化率特別高(gao),高(gao)可(ke)達到(dao)95%是種直接加(jia)熱(re)的方式。電(dian)(dian)(dian)(dian)磁(ci)爐,電(dian)(dian)(dian)(dian)磁(ci)灶 電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)電(dian)(dian)(dian)(dian)飯鍋都是采(cai)用(yong)的電(dian)(dian)(dian)(dian)磁(ci)加(jia)熱(re)技術(shu)。
電(dian)(dian)(dian)磁加熱(re)器(qi)(qi)工(gong)(gong)作原(yuan)理:電(dian)(dian)(dian)磁加熱(re)是(shi)(shi)(shi)利用(yong)電(dian)(dian)(dian)磁感應原(yuan)理將(jiang)(jiang)電(dian)(dian)(dian)能轉(zhuan)(zhuan)換(huan)(huan)為(wei)(wei)熱(re)能的(de)(de)(de)能量轉(zhuan)(zhuan)換(huan)(huan)過(guo)程(cheng),由(you)整流(liu)(liu)電(dian)(dian)(dian)路(lu)將(jiang)(jiang)50/60Hz的(de)(de)(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)轉(zhuan)(zhuan)變(bian)(bian)(bian)(bian)成(cheng)(cheng)(cheng)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya),再(zai)經過(guo)功(gong)率(lv)(lv)控(kong)制(zhi)電(dian)(dian)(dian)路(lu)將(jiang)(jiang)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)轉(zhuan)(zhuan)換(huan)(huan)成(cheng)(cheng)(cheng)頻(pin)(pin)率(lv)(lv)為(wei)(wei)20~40kHz的(de)(de)(de)高(gao)(gao)頻(pin)(pin)電(dian)(dian)(dian)壓(ya)(ya),當高(gao)(gao)速變(bian)(bian)(bian)(bian)化的(de)(de)(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)通過(guo)線圈時,線圈會產生高(gao)(gao)速變(bian)(bian)(bian)(bian)化的(de)(de)(de)磁場(chang),磁場(chang)內(nei)的(de)(de)(de)交(jiao)變(bian)(bian)(bian)(bian)磁力(li)線通過(guo)金屬管(guan)(guan)道時(導(dao)磁、導(dao)電(dian)(dian)(dian)材(cai)料),管(guan)(guan)壁體(ti)內(nei)產生無數的(de)(de)(de)小渦流(liu)(liu),使輸(shu)油(you)(you)管(guan)(guan)道的(de)(de)(de)管(guan)(guan)壁本身自行發(fa)熱(re)與原(yuan)油(you)(you)進行熱(re)交(jiao)換(huan)(huan),達到加熱(re)原(yuan)油(you)(you)的(de)(de)(de)目的(de)(de)(de)。變(bian)(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)是(shi)(shi)(shi)高(gao)(gao)頻(pin)(pin)電(dian)(dian)(dian)磁加熱(re)器(qi)(qi)的(de)(de)(de)核心部件,是(shi)(shi)(shi)利用(yong)電(dian)(dian)(dian)力(li)半導(dao)體(ti)器(qi)(qi)件的(de)(de)(de)通斷作用(yong)將(jiang)(jiang)工(gong)(gong)頻(pin)(pin)電(dian)(dian)(dian)源(yuan)變(bian)(bian)(bian)(bian)換(huan)(huan)為(wei)(wei)另(ling)頻(pin)(pin)率(lv)(lv)的(de)(de)(de)電(dian)(dian)(dian)能控(kong)制(zhi)裝(zhuang)置。目前使用(yong)的(de)(de)(de)變(bian)(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)主(zhu)要采用(yong)交(jiao)流(liu)(liu)—直(zhi)(zhi)流(liu)(liu)—交(jiao)流(liu)(liu)方式,先把工(gong)(gong)頻(pin)(pin)交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)通過(guo)整流(liu)(liu)器(qi)(qi)轉(zhuan)(zhuan)換(huan)(huan)成(cheng)(cheng)(cheng)直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan),然后再(zai)把直(zhi)(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)轉(zhuan)(zhuan)換(huan)(huan)成(cheng)(cheng)(cheng)頻(pin)(pin)率(lv)(lv)、電(dian)(dian)(dian)壓(ya)(ya)均可(ke)控(kong)制(zhi)的(de)(de)(de)交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)供(gong)給電(dian)(dian)(dian)動機。變(bian)(bian)(bian)(bian)頻(pin)(pin)器(qi)(qi)的(de)(de)(de)電(dian)(dian)(dian)路(lu)般由(you)整流(liu)(liu)、中(zhong)間(jian)直(zhi)(zhi)流(liu)(liu)環(huan)節(jie)(jie)、逆變(bian)(bian)(bian)(bian)和控(kong)制(zhi)4個(ge)部分(fen)組成(cheng)(cheng)(cheng)。整流(liu)(liu)部分(fen)為(wei)(wei)三相橋式不可(ke)控(kong)整流(liu)(liu)器(qi)(qi),逆變(bian)(bian)(bian)(bian)部分(fen)為(wei)(wei)IGBT三相橋式逆變(bian)(bian)(bian)(bian)器(qi)(qi)且(qie)輸(shu)出為(wei)(wei)PWM波形,中(zhong)間(jian)直(zhi)(zhi)流(liu)(liu)環(huan)節(jie)(jie)為(wei)(wei)濾波、直(zhi)(zhi)流(liu)(liu)儲能和緩沖無功(gong)功(gong)率(lv)(lv)。
電(dian)磁加(jia)(jia)熱(re)節電(dian)分析:電(dian)磁加(jia)(jia)熱(re)器在塑(su)料(liao)機械上節能30%-70%是(shi)怎么來的(de)?
1、相(xiang)比電阻加熱,電磁加熱器(qi)多了層保(bao)溫(wen)層,熱能(neng)利(li)用率增加。
2、相(xiang)比電阻加熱(re)(re),電磁加熱(re)(re)器(qi)直接作用于料管加熱(re)(re),減(jian)少(shao)了熱(re)(re)傳遞熱(re)(re)能損耗。
3、相比電阻加熱,電磁加熱器的加熱速度要快四分之以上(shang),減少(shao)了加熱時間。
4、相比電(dian)阻加(jia)熱(re),電(dian)磁(ci)加(jia)熱(re)器(qi)的(de)加(jia)熱(re)速度快,生產效率(lv)(lv)就提(ti)高(gao)了,讓(rang)電(dian)機處在飽和狀態,使(shi)其(qi)減少(shao)了,高(gao)功率(lv)(lv)低需求造成的(de)電(dian)能損耗。
影響電(dian)磁加熱器的加熱效率的3個(ge)因素:
1、電(dian)磁加(jia)熱設備(bei)主機放置的距離有關:般情況下,廠家都會建(jian)議放在5米以內,這樣加(jia)熱效果才(cai)會更好。
2、與被加(jia)熱(re)的(de)(de)(de)(de)物(wu)體材(cai)(cai)料有(you)(you)關:目前大(da)多數的(de)(de)(de)(de)工業加(jia)熱(re)設備對于(yu)所加(jia)熱(re)的(de)(de)(de)(de)介質(zhi)還是(shi)(shi)有(you)(you)定(ding)的(de)(de)(de)(de)要求(qiu)的(de)(de)(de)(de),好是(shi)(shi)可以直(zhi)(zhi)接(jie)加(jia)熱(re)的(de)(de)(de)(de),例如(ru)鐵質(zhi)、碳鋼材(cai)(cai)質(zhi)。對于(yu)直(zhi)(zhi)接(jie)加(jia)熱(re)不銹鋼材(cai)(cai)質(zhi)的(de)(de)(de)(de)管(guan)道或者容器(qi)還是(shi)(shi)有(you)(you)定(ding)的(de)(de)(de)(de)困難。不過電磁(ci)掌握電磁(ci)加(jia)熱(re)核心技術(shu),能(neng)夠直(zhi)(zhi)接(jie)加(jia)熱(re)304、316等(deng)3系列(lie),并且擁有(you)(you)豐富(fu)的(de)(de)(de)(de)應(ying)用案例,直(zhi)(zhi)接(jie)加(jia)熱(re)不銹鋼的(de)(de)(de)(de)技術(shu)行(xing)業先。
3、與加熱(re)的(de)距(ju)(ju)離(li)有關:被加熱(re)體(ti)與電(dian)磁(ci)加熱(re)線(xian)圈的(de)距(ju)(ju)離(li),正常來說,對于220V、5KW的(de)電(dian)磁(ci)加熱(re)控(kong)制(zhi)板以(yi)及以(yi)下功率(lv)兩(liang)者(zhe)間的(de)距(ju)(ju)離(li)好相(xiang)隔1.5-2公分;380V、5KW電(dian)磁(ci)加熱(re)設備距(ju)(ju)離(li)好相(xiang)隔2-3公分。這(zhe)個(ge)距(ju)(ju)離(li)廠家都(dou)是利用保溫棉(mian)代替,既避免了隔空(kong),又避免熱(re)量損失,所以(yi)客戶無需擔心隔空(kong)問(wen)題。
電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)用(yong)風冷(leng)的(de)(de)好(hao)還是(shi)(shi)(shi)水(shui)(shui)冷(leng)的(de)(de)好(hao)?現今工(gong)業域和(he)民用(yong)設備中較廣泛的(de)(de)種(zhong)加(jia)熱(re)(re)方式(shi),主要(yao)是(shi)(shi)(shi)采用(yong)電(dian)磁(ci)(ci)加(jia)熱(re)(re)技術(shu),在使用(yong)電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)中用(yong)戶都關心的(de)(de)電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)是(shi)(shi)(shi)水(shui)(shui)冷(leng)好(hao)還是(shi)(shi)(shi)風冷(leng)好(hao)呢(ni)?電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)作業段時間后,控制(zhi)面板是(shi)(shi)(shi)會發(fa)熱(re)(re)發(fa)燙的(de)(de),所以就需要(yao)對(dui)控制(zhi)板進行降溫處(chu)理,避(bi)免由(you)于控制(zhi)板溫度過(guo)(guo)高(gao),自身過(guo)(guo)熱(re)(re)保護致使電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)中止加(jia)熱(re)(re)作業。通(tong)常對(dui)控制(zhi)板降溫處(chu)理方法(fa)有兩種(zhong),種(zhong)是(shi)(shi)(shi)風冷(leng)的(de)(de),另種(zhong)是(shi)(shi)(shi)水(shui)(shui)冷(leng)的(de)(de)。對(dui)于風冷(leng)和(he)水(shui)(shui)冷(leng)的(de)(de)電(dian)磁(ci)(ci)加(jia)熱(re)(re)器(qi)(qi)(qi)哪(na)個好(hao)就要(yao)依(yi)據場合、氣(qi)候、環境而論。
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