框架式南京電磁鐵又稱(cheng)箱式電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵(tie)(tie)，因(yin)為(wei)它(ta)的形狀(zhuang)是方形的。這(zhe)種框架電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵(tie)(tie)是一種產生電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)的設(she)備(bei)。當(dang)變壓(ya)器鐵(tie)(tie)心(xin)在外旋轉，其輸(shu)出功(gong)率(lv)與導電(dian)(dian)(dian)(dian)(dian)繞組(zu)電(dian)(dian)(dian)(dian)(dian)阻一致時，帶電(dian)(dian)(dian)(dian)(dian)流(liu)的線圈具有與磁(ci)(ci)(ci)鐵(tie)(tie)相同的磁(ci)(ci)(ci)性。我(wo)們(men)通(tong)常(chang)(chang)把它(ta)做(zuo)成條狀(zhuang)或(huo)蹄狀(zhuang)，使(shi)它(ta)的變壓(ya)器鐵(tie)(tie)心(xin)更容易磁(ci)(ci)(ci)化。另外，為(wei)了使(shi)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵(tie)(tie)立即斷電(dian)(dian)(dian)(dian)(dian)消磁(ci)(ci)(ci)，我(wo)們(men)經常(chang)(chang)采用快速(su)消磁(ci)(ci)(ci)的軟鐵(tie)(tie)或(huo)硅(gui)鋼材(cai)料制作(zuo)。這(zhe)種電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵(tie)(tie)插(cha)上電(dian)(dian)(dian)(dian)(dian)源就會有磁(ci)(ci)(ci)性。當(dang)電(dian)(dian)(dian)(dian)(dian)源關閉(bi)時，磁(ci)(ci)(ci)場將消失。方形電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)鐵(tie)(tie)在我(wo)們(men)的日常(chang)(chang)生活中有很(hen)多用途，因(yin)為(wei)它(ta)的產生也(ye)使(shi)發電(dian)(dian)(dian)(dian)(dian)機組(zu)的輸(shu)出功(gong)率(lv)有了很(hen)大的提高。

電磁鐵交流原理

我(wo)們(men)先來看(kan)看(kan)電(dian)(dian)磁(ci)(ci)鐵(tie)(tie)的(de)組成(cheng)原理：電(dian)(dian)磁(ci)(ci)鐵(tie)(tie)主(zhu)要(yao)由(you)線(xian)圈(quan)、鐵(tie)(tie)芯和(he)電(dian)(dian)樞組成(cheng)。鐵(tie)(tie)芯和(he)電(dian)(dian)樞一般由(you)軟磁(ci)(ci)材料制成(cheng)。一般分為直流電(dian)(dian)磁(ci)(ci)鐵(tie)(tie)和(he)通(tong)信(xin)電(dian)(dian)磁(ci)(ci)鐵(tie)(tie)。通(tong)信(xin)電(dian)(dian)磁(ci)(ci)鐵(tie)(tie)的(de)原理是什(shen)么(me)？

通訊電磁鐵(tie)線圈插入時，鐵(tie)芯(xin)和電樞(shu)被磁化，變成(cheng)兩個極性相反(fan)的(de)磁鐵(tie)。當(dang)(dang)吸附力(li)超(chao)過張力(li)彈簧的(de)反(fan)作(zuo)用力(li)時，電樞(shu)轉(zhuan)向(xiang)(xiang)點向(xiang)(xiang)鐵(tie)心(xin)方向(xiang)(xiang)移動。當(dang)(dang)線圈中的(de)電流(liu)低(di)于一定值(zhi)或(huo)電源中斷時，電磁吸收力(li)低(di)于張力(li)彈簧的(de)反(fan)作(zuo)用力(li)，電樞(shu)在反(fan)作(zuo)用力(li)的(de)作(zuo)用下會回到原(yuan)來的(de)釋放方向(xiang)(xiang)。

值(zhi)得注意的(de)(de)是，通信電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)的(de)(de)電(dian)(dian)(dian)磁(ci)吸(xi)收力(li)是由磁(ci)選機的(de)(de)磁(ci)場和磁(ci)選機的(de)(de)磁(ci)場組成(cheng)(cheng)的(de)(de)兩(liang)個(ge)交(jiao)變(bian)電(dian)(dian)(dian)場的(de)(de)磁(ci)場力(li)加(jia)上直(zhi)流凈重作用的(de)(de)，更(geng)容易釋(shi)放，所以輸出(chu)功率低，變(bian)壓器鐵(tie)(tie)心(xin)體積大，線(xian)圈能(neng)耗高；功率因數(shu)低，線(xian)圈電(dian)(dian)(dian)流大，發熱嚴重，不僅(jin)浪費了(le)電(dian)(dian)(dian)能(neng)，而且造(zao)成(cheng)(cheng)線(xian)圈老(lao)化破壞過早。很糟糕。因此，大多數(shu)時候我們(men)會選擇直(zhi)流電(dian)(dian)(dian)而不是通訊電(dian)(dian)(dian)磁(ci)鐵(tie)(tie)。