電(dian)磁加(jia)熱器(qi)的(de)(de)全橋和半橋的(de)(de)穩定性的(de)(de)異同：

、相同：在技術(shu)設計處理完善的情況下，均可達到較理想的運(yun)作穩(wen)定(ding)性(xing)。

二(er)、元(yuan)件損耗上不同(tong)：

1、全橋：各元件(jian)負擔(dan)較(jiao)合理(li)，損耗比較(jiao)小，壽命較(jiao)長(chang)。

2、半橋：各元件負擔較重，損(sun)耗比相對(dui)較大，壽命相對(dui)合理(li)。

三、故障率上：

1、全(quan)橋：保護電路設計較復雜，周全(quan)，維修率(lv)較低。

2、半(ban)橋：保護(hu)電路設計較簡(jian)化(hua)，維修(xiu)率(小元件)相(xiang)對較高。

電(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)線(xian)圈(quan)(quan)(quan)(quan)繞(rao)法(fa)：電(dian)(dian)(dian)磁(ci)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)線(xian)圈(quan)(quan)(quan)(quan)根據加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)體(ti)(ti)的(de)(de)形狀、大(da)(da)小(xiao)(xiao)(xiao)而異，纏(chan)繞(rao)線(xian)圈(quan)(quan)(quan)(quan)的(de)(de)用(yong)線(xian)長(chang)(chang)(chang)度(du)(du)及電(dian)(dian)(dian)感(gan)量會有(you)點(dian)(dian)差(cha)別(bie)。電(dian)(dian)(dian)磁(ci)感(gan)應加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)器(qi)每個(ge)功率用(yong)線(xian)的(de)(de)線(xian)徑(jing)大(da)(da)小(xiao)(xiao)(xiao)般都是(shi)固定的(de)(de)，線(xian)長(chang)(chang)(chang)也是(shi)基本固定的(de)(de)（加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)體(ti)(ti)過大(da)(da)線(xian)長(chang)(chang)(chang)會加(jia)(jia)(jia)(jia)(jia)(jia)(jia)長(chang)(chang)(chang)比(bi)如直徑(jing)100MM和(he)直徑(jing)1000MM用(yong)同樣的(de)(de)線(xian)長(chang)(chang)(chang)直徑(jing)小(xiao)(xiao)(xiao)的(de)(de)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)體(ti)(ti)繞(rao)的(de)(de)圈(quan)(quan)(quan)(quan)數多(duo)(duo)，繞(rao)在直徑(jing)大(da)(da)的(de)(de)加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)體(ti)(ti)上圈(quan)(quan)(quan)(quan)數就(jiu)(jiu)是(shi)會少(shao)(shao)(shao)圈(quan)(quan)(quan)(quan)數少(shao)(shao)(shao)電(dian)(dian)(dian)感(gan)量就(jiu)(jiu)會小(xiao)(xiao)(xiao)，這(zhe)個(ge)時(shi)(shi)候(hou)就(jiu)(jiu)應該(gai)適(shi)當增加(jia)(jia)(jia)(jia)(jia)(jia)(jia)用(yong)線(xian)長(chang)(chang)(chang)度(du)(du)，具體(ti)(ti)增加(jia)(jia)(jia)(jia)(jia)(jia)(jia)多(duo)(duo)少(shao)(shao)(shao)在沒有(you)經驗的(de)(de)情況下(xia)要測(ce)實際的(de)(de)電(dian)(dian)(dian)感(gan)量確定），纏(chan)繞(rao)線(xian)圈(quan)(quan)(quan)(quan)的(de)(de)時(shi)(shi)候(hou)每圈(quan)(quan)(quan)(quan)之(zhi)間(jian)的(de)(de)間(jian)隔距(ju)離根據加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)溫區大(da)(da)小(xiao)(xiao)(xiao)長(chang)(chang)(chang)度(du)(du)及線(xian)長(chang)(chang)(chang)而定，可(ke)以(yi)圈(quan)(quan)(quan)(quan)圈(quan)(quan)(quan)(quan)緊(jin)密繞(rao)，也可(ke)以(yi)緊(jin)密繞(rao)幾圈(quan)(quan)(quan)(quan)間(jian)隔幾公分(fen)再緊(jin)密繞(rao)幾圈(quan)(quan)(quan)(quan)，也可(ke)以(yi)每圈(quan)(quan)(quan)(quan)與每圈(quan)(quan)(quan)(quan)之(zhi)間(jian)都間(jian)隔點(dian)(dian)距(ju)離繞(rao)。如果加(jia)(jia)(jia)(jia)(jia)(jia)(jia)熱(re)(re)體(ti)(ti)尺(chi)寸有(you)點(dian)(dian)小(xiao)(xiao)(xiao)還可(ke)以(yi)把(ba)線(xian)圈(quan)(quan)(quan)(quan)繞(rao)成雙(shuang)層或三層。

電(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)(re)器(qi)工(gong)作(zuo)原(yuan)理(li)：電(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)(re)是(shi)利用(yong)電(dian)(dian)(dian)磁(ci)(ci)(ci)感應(ying)原(yuan)理(li)將電(dian)(dian)(dian)能(neng)(neng)(neng)轉(zhuan)(zhuan)換為(wei)(wei)熱(re)(re)能(neng)(neng)(neng)的(de)能(neng)(neng)(neng)量轉(zhuan)(zhuan)換過(guo)程，由整(zheng)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)路將50/60Hz的(de)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)轉(zhuan)(zhuan)變(bian)(bian)成直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)，再(zai)經過(guo)功率(lv)控(kong)(kong)(kong)制(zhi)電(dian)(dian)(dian)路將直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)壓(ya)(ya)轉(zhuan)(zhuan)換成頻(pin)(pin)(pin)率(lv)為(wei)(wei)20～40kHz的(de)高頻(pin)(pin)(pin)電(dian)(dian)(dian)壓(ya)(ya)，當高速(su)變(bian)(bian)化的(de)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)通過(guo)線(xian)圈時，線(xian)圈會產生(sheng)高速(su)變(bian)(bian)化的(de)磁(ci)(ci)(ci)場，磁(ci)(ci)(ci)場內的(de)交(jiao)變(bian)(bian)磁(ci)(ci)(ci)力線(xian)通過(guo)金(jin)屬管(guan)道(dao)時（導磁(ci)(ci)(ci)、導電(dian)(dian)(dian)材料），管(guan)壁體內產生(sheng)無(wu)數的(de)小渦流(liu)(liu)(liu)(liu)，使(shi)輸油(you)管(guan)道(dao)的(de)管(guan)壁本(ben)身自(zi)行(xing)發熱(re)(re)與原(yuan)油(you)進行(xing)熱(re)(re)交(jiao)換，達到加(jia)熱(re)(re)原(yuan)油(you)的(de)目(mu)的(de)。變(bian)(bian)頻(pin)(pin)(pin)器(qi)是(shi)高頻(pin)(pin)(pin)電(dian)(dian)(dian)磁(ci)(ci)(ci)加(jia)熱(re)(re)器(qi)的(de)核心(xin)部(bu)件，是(shi)利用(yong)電(dian)(dian)(dian)力半導體器(qi)件的(de)通斷(duan)作(zuo)用(yong)將工(gong)頻(pin)(pin)(pin)電(dian)(dian)(dian)源(yuan)(yuan)變(bian)(bian)換為(wei)(wei)另(ling)頻(pin)(pin)(pin)率(lv)的(de)電(dian)(dian)(dian)能(neng)(neng)(neng)控(kong)(kong)(kong)制(zhi)裝置。目(mu)前使(shi)用(yong)的(de)變(bian)(bian)頻(pin)(pin)(pin)器(qi)主(zhu)要采用(yong)交(jiao)流(liu)(liu)(liu)(liu)—直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)—交(jiao)流(liu)(liu)(liu)(liu)方式(shi)(shi)，先(xian)把(ba)(ba)工(gong)頻(pin)(pin)(pin)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)通過(guo)整(zheng)流(liu)(liu)(liu)(liu)器(qi)轉(zhuan)(zhuan)換成直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)，然后再(zai)把(ba)(ba)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)轉(zhuan)(zhuan)換成頻(pin)(pin)(pin)率(lv)、電(dian)(dian)(dian)壓(ya)(ya)均可控(kong)(kong)(kong)制(zhi)的(de)交(jiao)流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)供給電(dian)(dian)(dian)動機。變(bian)(bian)頻(pin)(pin)(pin)器(qi)的(de)電(dian)(dian)(dian)路般由整(zheng)流(liu)(liu)(liu)(liu)、中間(jian)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)環(huan)(huan)節(jie)、逆變(bian)(bian)和控(kong)(kong)(kong)制(zhi)4個部(bu)分組成。整(zheng)流(liu)(liu)(liu)(liu)部(bu)分為(wei)(wei)三(san)相(xiang)橋(qiao)式(shi)(shi)不(bu)可控(kong)(kong)(kong)整(zheng)流(liu)(liu)(liu)(liu)器(qi)，逆變(bian)(bian)部(bu)分為(wei)(wei)IGBT三(san)相(xiang)橋(qiao)式(shi)(shi)逆變(bian)(bian)器(qi)且輸出(chu)為(wei)(wei)PWM波形，中間(jian)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)環(huan)(huan)節(jie)為(wei)(wei)濾波、直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)儲(chu)能(neng)(neng)(neng)和緩沖無(wu)功功率(lv)。

電(dian)磁(ci)(ci)(ci)加熱(re)器(qi)是種(zhong)怎樣的(de)(de)(de)裝置(zhi)：電(dian)磁(ci)(ci)(ci)加熱(re)器(qi)是種(zhong)利用電(dian)磁(ci)(ci)(ci)感(gan)應原理將電(dian)能轉(zhuan)換為熱(re)能的(de)(de)(de)裝置(zhi)。在(zai)電(dian)磁(ci)(ci)(ci)加熱(re)器(qi)內部，由整(zheng)流電(dian)路(lu)將50/60Hz的(de)(de)(de)交(jiao)流電(dian)壓(ya)變成直(zhi)流電(dian)壓(ya)，再經(jing)過(guo)控制電(dian)路(lu)將直(zhi)流電(dian)壓(ya)轉(zhuan)換成頻率為15-20KHz的(de)(de)(de)高(gao)頻電(dian)壓(ya)，高(gao)速變化的(de)(de)(de)電(dian)流流過(guo)線(xian)(xian)圈(quan)會(hui)產生(sheng)高(gao)速變化的(de)(de)(de)磁(ci)(ci)(ci)場(chang)，當磁(ci)(ci)(ci)場(chang)內的(de)(de)(de)磁(ci)(ci)(ci)力線(xian)(xian)通過(guo)金屬器(qi)皿(min)(min)(導(dao)(dao)磁(ci)(ci)(ci)又導(dao)(dao)電(dian)材料)底部金屬體內產生(sheng)無數的(de)(de)(de)小渦流，使(shi)器(qi)皿(min)(min)本身自行高(gao)速發(fa)熱(re)，然后再加熱(re)器(qi)皿(min)(min)內的(de)(de)(de)東(dong)西(xi)。而電(dian)磁(ci)(ci)(ci)加熱(re)本身對器(qi)皿(min)(min)和器(qi)皿(min)(min)內的(de)(de)(de)物品的(de)(de)(de)物理性質和化學性質不產生(sheng)任何改變。

電磁加熱器(qi)區(qu)別：

、家用(yong)電(dian)(dian)磁(ci)(ci)爐(lu)功(gong)率(lv)相對(dui)較(jiao)小，且是220V交流轉變成(cheng)直流，實(shi)現方(fang)法(fa)簡單，家用(yong)電(dian)(dian)磁(ci)(ci)爐(lu)功(gong)率(lv)般在2200瓦以內（實(shi)際功(gong)率(lv)1900瓦以內），家用(yong)電(dian)(dian)磁(ci)(ci)爐(lu)要求保證每天工作(zuo)2-3小時。而電(dian)(dian)磁(ci)(ci)加熱器則是應用(yong)在工業(ye)設備(bei)上(shang)(shang)，并(bing)且功(gong)率(lv)達到了60KW，選材(cai)和控制模式與(yu)家用(yong)電(dian)(dian)磁(ci)(ci)爐(lu)是完(wan)全不同的(de)。電(dian)(dian)磁(ci)(ci)加熱器是屬于商用(yong)工業(ye)產(chan)品。具(ju)備(bei)家用(yong)電(dian)(dian)磁(ci)(ci)爐(lu)無法(fa)比擬的(de)穩定性(xing)和耐用(yong)性(xing)。正常使用(yong)，可連續工作(zuo)10年(nian)（10萬小時）以上(shang)(shang)。

二、電磁加熱器和家用電磁爐(lu)區(qu)別之家用電磁爐(lu)是(shi)為(wei)了(le)滿足居家生(sheng)活而(er)(er)設計開發(fa)的(de)，而(er)(er)電磁加熱器是(shi)為(wei)了(le)解決塑料加熱的(de)問題而(er)(er)設計開發(fa)。

如何選擇合(he)適功(gong)率的電磁感應加熱(re)器？

1、被加(jia)熱的工件(jian)形狀和尺寸(cun)：工件(jian)大、棒料、實材(cai)，應(ying)選用相對(dui)功率(lv)(lv)大，頻率(lv)(lv)低(di)的感(gan)(gan)應(ying)加(jia)熱設備；工件(jian)小、管材(cai)、板材(cai)、齒輪等(deng)，則選用相對(dui)功率(lv)(lv)小，頻率(lv)(lv)高的電磁(ci)感(gan)(gan)應(ying)加(jia)熱器。

2、需(xu)要加(jia)(jia)熱(re)的(de)深(shen)度(du)和面(mian)積(ji)(ji)：加(jia)(jia)熱(re)深(shen)度(du)深(shen)，面(mian)積(ji)(ji)大，整體加(jia)(jia)熱(re)，應(ying)選(xuan)用(yong)功(gong)率(lv)大，頻率(lv)低的(de)感(gan)應(ying)加(jia)(jia)熱(re)設備；加(jia)(jia)熱(re)深(shen)度(du)淺(qian)，面(mian)積(ji)(ji)小，局部(bu)加(jia)(jia)熱(re)，選(xuan)用(yong)相(xiang)對功(gong)率(lv)小，頻率(lv)高(gao)的(de)電磁感(gan)應(ying)加(jia)(jia)熱(re)設備。

3、所需(xu)的(de)加熱(re)速度：需(xu)要的(de)加熱(re)速度快(kuai)，應選(xuan)用功(gong)率(lv)相(xiang)對較大，頻率(lv)相(xiang)對較高(gao)的(de)感應加熱(re)設備。

4、工藝(yi)(yi)要求：般來說，淬火、焊接等工藝(yi)(yi)，相(xiang)對可以功率(lv)(lv)(lv)(lv)選(xuan)(xuan)小些(xie)，頻率(lv)(lv)(lv)(lv)選(xuan)(xuan)高些(xie)；退(tui)火、回火等工藝(yi)(yi)，相(xiang)對功率(lv)(lv)(lv)(lv)選(xuan)(xuan)大些(xie)，頻率(lv)(lv)(lv)(lv)選(xuan)(xuan)低些(xie)；紅沖、熱殿、熔煉等，需要透熱效果好的工藝(yi)(yi)，則電磁加熱器功率(lv)(lv)(lv)(lv)應選(xuan)(xuan)得(de)更大，頻率(lv)(lv)(lv)(lv)選(xuan)(xuan)得(de)更低。

電磁(ci)加熱(re)器線(xian)(xian)(xian)圈選型(xing)原(yuan)則：線(xian)(xian)(xian)材(cai)本(ben)身：線(xian)(xian)(xian)材(cai)本(ben)身有很多種類(lei)，例如高頻線(xian)(xian)(xian)、云母線(xian)(xian)(xian)、防水線(xian)(xian)(xian)、硅膠線(xian)(xian)(xian)、鍍鎳線(xian)(xian)(xian)、純(chun)鎳線(xian)(xian)(xian)、銅管、合金導線(xian)(xian)(xian)等，不同種類(lei)的線(xian)(xian)(xian)材(cai)適用場合不同，選購前應仔細問詢(xun)。

電(dian)磁加熱(re)器(qi)用于油氣管道(dao)應用的特點：

1、熱(re)效(xiao)高：節能電(dian)磁加熱(re)器(qi)不需要預熱(re)管道。

2、不(bu)破壞管道保溫層：由于(yu)是感(gan)應節能(neng)電磁加熱(re)，磁力線能(neng)穿透保溫層，改造管單。

3、安全(quan)性高：無明(ming)火(huo)，無熱(re)輻射(she)，溫度(du)可控。

4、操作方便：在管道上纏上電磁線圈，做好溫度(du)控溫探頭，調節控溫系統，開機調節即可(ke)自控加(jia)熱恒溫。