框架式昆明電磁鐵又稱箱(xiang)式電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)，因為它(ta)的(de)(de)形狀是方(fang)形的(de)(de)。這(zhe)種框(kuang)架(jia)電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)是一種產生電(dian)(dian)(dian)磁(ci)的(de)(de)設(she)備。當變壓(ya)器鐵(tie)(tie)心在外旋轉，其輸出(chu)功(gong)率(lv)(lv)與導電(dian)(dian)(dian)繞組電(dian)(dian)(dian)阻一致時，帶(dai)電(dian)(dian)(dian)流的(de)(de)線(xian)圈(quan)具(ju)有(you)(you)與磁(ci)鐵(tie)(tie)相同的(de)(de)磁(ci)性。我們通常(chang)把它(ta)做成(cheng)條(tiao)狀或蹄狀，使它(ta)的(de)(de)變壓(ya)器鐵(tie)(tie)心更容易磁(ci)化(hua)。另外，為了(le)使電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)立即斷電(dian)(dian)(dian)消(xiao)磁(ci)，我們經(jing)常(chang)采(cai)用快速消(xiao)磁(ci)的(de)(de)軟鐵(tie)(tie)或硅鋼(gang)材(cai)料制作。這(zhe)種電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)插上(shang)電(dian)(dian)(dian)源就(jiu)會有(you)(you)磁(ci)性。當電(dian)(dian)(dian)源關閉時，磁(ci)場(chang)將消(xiao)失。方(fang)形電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)在我們的(de)(de)日常(chang)生活中有(you)(you)很(hen)多用途，因為它(ta)的(de)(de)產生也使發電(dian)(dian)(dian)機組的(de)(de)輸出(chu)功(gong)率(lv)(lv)有(you)(you)了(le)很(hen)大的(de)(de)提高。

電磁鐵交流原理

我(wo)們先來看(kan)看(kan)電(dian)磁(ci)鐵(tie)(tie)的(de)組成原(yuan)理(li)：電(dian)磁(ci)鐵(tie)(tie)主(zhu)要由線圈、鐵(tie)(tie)芯(xin)和電(dian)樞(shu)組成。鐵(tie)(tie)芯(xin)和電(dian)樞(shu)一般由軟(ruan)磁(ci)材料(liao)制(zhi)成。一般分(fen)為直流(liu)電(dian)磁(ci)鐵(tie)(tie)和通信(xin)電(dian)磁(ci)鐵(tie)(tie)。通信(xin)電(dian)磁(ci)鐵(tie)(tie)的(de)原(yuan)理(li)是什么？

通訊電(dian)(dian)磁(ci)鐵線圈插入時，鐵芯和電(dian)(dian)樞(shu)被磁(ci)化，變成兩個(ge)極性(xing)相(xiang)反(fan)的(de)磁(ci)鐵。當吸(xi)附(fu)力(li)超過張(zhang)力(li)彈簧的(de)反(fan)作(zuo)(zuo)用(yong)力(li)時，電(dian)(dian)樞(shu)轉向(xiang)點向(xiang)鐵心方(fang)向(xiang)移動。當線圈中(zhong)的(de)電(dian)(dian)流低(di)于一定(ding)值或電(dian)(dian)源(yuan)中(zhong)斷時，電(dian)(dian)磁(ci)吸(xi)收力(li)低(di)于張(zhang)力(li)彈簧的(de)反(fan)作(zuo)(zuo)用(yong)力(li)，電(dian)(dian)樞(shu)在反(fan)作(zuo)(zuo)用(yong)力(li)的(de)作(zuo)(zuo)用(yong)下會回到(dao)原來的(de)釋放方(fang)向(xiang)。

值得(de)注意的是，通(tong)信電(dian)(dian)(dian)磁鐵(tie)的電(dian)(dian)(dian)磁吸收力是由(you)磁選機(ji)的磁場(chang)和磁選機(ji)的磁場(chang)組(zu)成(cheng)(cheng)的兩個交(jiao)變(bian)電(dian)(dian)(dian)場(chang)的磁場(chang)力加上直(zhi)流(liu)凈重(zhong)作用的，更容易釋放，所以(yi)輸出功率低，變(bian)壓器鐵(tie)心體積(ji)大，線(xian)(xian)圈(quan)能(neng)耗高；功率因數(shu)低，線(xian)(xian)圈(quan)電(dian)(dian)(dian)流(liu)大，發熱嚴(yan)重(zhong)，不(bu)僅浪費了電(dian)(dian)(dian)能(neng)，而(er)且造成(cheng)(cheng)線(xian)(xian)圈(quan)老化(hua)破壞(huai)過早。很糟糕。因此(ci)，大多數(shu)時(shi)候我們(men)會(hui)選擇直(zhi)流(liu)電(dian)(dian)(dian)而(er)不(bu)是通(tong)訊電(dian)(dian)(dian)磁鐵(tie)。