框架式陜西電磁鐵又(you)稱箱式電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)(tie)，因為它(ta)的(de)(de)形(xing)狀(zhuang)是(shi)方形(xing)的(de)(de)。這種(zhong)(zhong)框架電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)(tie)是(shi)一種(zhong)(zhong)產生(sheng)電(dian)(dian)(dian)磁(ci)(ci)的(de)(de)設備。當變壓(ya)器(qi)鐵(tie)(tie)(tie)心(xin)在(zai)外旋轉，其輸(shu)出(chu)功(gong)率與(yu)導電(dian)(dian)(dian)繞組電(dian)(dian)(dian)阻(zu)一致(zhi)時，帶(dai)電(dian)(dian)(dian)流的(de)(de)線圈具有與(yu)磁(ci)(ci)鐵(tie)(tie)(tie)相(xiang)同的(de)(de)磁(ci)(ci)性(xing)(xing)。我(wo)們(men)通常(chang)(chang)把它(ta)做成條狀(zhuang)或(huo)蹄狀(zhuang)，使(shi)它(ta)的(de)(de)變壓(ya)器(qi)鐵(tie)(tie)(tie)心(xin)更容易磁(ci)(ci)化。另外，為了使(shi)電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)(tie)立即斷電(dian)(dian)(dian)消磁(ci)(ci)，我(wo)們(men)經常(chang)(chang)采用快速消磁(ci)(ci)的(de)(de)軟(ruan)鐵(tie)(tie)(tie)或(huo)硅鋼材料制作(zuo)。這種(zhong)(zhong)電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)(tie)插(cha)上電(dian)(dian)(dian)源(yuan)就會有磁(ci)(ci)性(xing)(xing)。當電(dian)(dian)(dian)源(yuan)關閉時，磁(ci)(ci)場將消失(shi)。方形(xing)電(dian)(dian)(dian)磁(ci)(ci)鐵(tie)(tie)(tie)在(zai)我(wo)們(men)的(de)(de)日常(chang)(chang)生(sheng)活中(zhong)有很(hen)多用途，因為它(ta)的(de)(de)產生(sheng)也使(shi)發電(dian)(dian)(dian)機組的(de)(de)輸(shu)出(chu)功(gong)率有了很(hen)大的(de)(de)提高。

電磁鐵交流原理

我們(men)先來看看電(dian)(dian)磁(ci)(ci)鐵(tie)的(de)組成原理(li)：電(dian)(dian)磁(ci)(ci)鐵(tie)主要由線圈、鐵(tie)芯和電(dian)(dian)樞組成。鐵(tie)芯和電(dian)(dian)樞一般(ban)由軟磁(ci)(ci)材(cai)料制成。一般(ban)分為直流電(dian)(dian)磁(ci)(ci)鐵(tie)和通信電(dian)(dian)磁(ci)(ci)鐵(tie)。通信電(dian)(dian)磁(ci)(ci)鐵(tie)的(de)原理(li)是什么？

通訊電(dian)(dian)磁鐵線圈(quan)插(cha)入時(shi)，鐵芯和電(dian)(dian)樞(shu)被磁化，變成兩個極性相反的(de)(de)(de)磁鐵。當吸(xi)附力(li)超過張(zhang)力(li)彈簧的(de)(de)(de)反作用(yong)力(li)時(shi)，電(dian)(dian)樞(shu)轉向點向鐵心方向移(yi)動。當線圈(quan)中(zhong)(zhong)的(de)(de)(de)電(dian)(dian)流低(di)(di)于一定值或(huo)電(dian)(dian)源中(zhong)(zhong)斷時(shi)，電(dian)(dian)磁吸(xi)收力(li)低(di)(di)于張(zhang)力(li)彈簧的(de)(de)(de)反作用(yong)力(li)，電(dian)(dian)樞(shu)在反作用(yong)力(li)的(de)(de)(de)作用(yong)下會回到(dao)原來的(de)(de)(de)釋放(fang)方向。

值得注(zhu)意(yi)的(de)(de)是(shi)，通(tong)信電(dian)(dian)磁鐵(tie)的(de)(de)電(dian)(dian)磁吸收力(li)是(shi)由磁選機的(de)(de)磁場(chang)和(he)磁選機的(de)(de)磁場(chang)組成的(de)(de)兩個交變(bian)電(dian)(dian)場(chang)的(de)(de)磁場(chang)力(li)加上直流凈重(zhong)作用的(de)(de)，更(geng)容易釋放，所以輸出功率低，變(bian)壓器鐵(tie)心體積(ji)大，線圈能耗高；功率因數低，線圈電(dian)(dian)流大，發熱嚴重(zhong)，不僅浪(lang)費了(le)電(dian)(dian)能，而(er)且造成線圈老化破(po)壞過早(zao)。很糟糕。因此，大多數時候我們(men)會選擇直流電(dian)(dian)而(er)不是(shi)通(tong)訊電(dian)(dian)磁鐵(tie)。