框架式上海電磁鐵又稱箱式電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)，因為它(ta)(ta)的(de)(de)(de)(de)形(xing)狀(zhuang)是(shi)方形(xing)的(de)(de)(de)(de)。這種框(kuang)架電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)是(shi)一(yi)種產生電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)的(de)(de)(de)(de)設(she)備。當(dang)變(bian)壓(ya)器鐵(tie)(tie)心在外(wai)(wai)旋轉，其輸出功(gong)率(lv)與導電(dian)(dian)(dian)(dian)繞組(zu)電(dian)(dian)(dian)(dian)阻一(yi)致時，帶電(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)線圈具有(you)與磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)相同的(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)。我們通常把它(ta)(ta)做(zuo)成條狀(zhuang)或蹄狀(zhuang)，使(shi)它(ta)(ta)的(de)(de)(de)(de)變(bian)壓(ya)器鐵(tie)(tie)心更容易磁(ci)(ci)(ci)(ci)(ci)(ci)化。另(ling)外(wai)(wai)，為了使(shi)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)立即斷電(dian)(dian)(dian)(dian)消(xiao)磁(ci)(ci)(ci)(ci)(ci)(ci)，我們經常采用快速消(xiao)磁(ci)(ci)(ci)(ci)(ci)(ci)的(de)(de)(de)(de)軟鐵(tie)(tie)或硅鋼材料制(zhi)作(zuo)。這種電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)插(cha)上電(dian)(dian)(dian)(dian)源就會有(you)磁(ci)(ci)(ci)(ci)(ci)(ci)性(xing)。當(dang)電(dian)(dian)(dian)(dian)源關閉時，磁(ci)(ci)(ci)(ci)(ci)(ci)場將消(xiao)失。方形(xing)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)鐵(tie)(tie)在我們的(de)(de)(de)(de)日常生活中(zhong)有(you)很(hen)多用途(tu)，因為它(ta)(ta)的(de)(de)(de)(de)產生也使(shi)發電(dian)(dian)(dian)(dian)機組(zu)的(de)(de)(de)(de)輸出功(gong)率(lv)有(you)了很(hen)大的(de)(de)(de)(de)提(ti)高(gao)。

電磁鐵交流原理

我們先來看看電(dian)磁鐵(tie)的組(zu)(zu)成原(yuan)理(li)：電(dian)磁鐵(tie)主要由線圈、鐵(tie)芯(xin)和電(dian)樞(shu)組(zu)(zu)成。鐵(tie)芯(xin)和電(dian)樞(shu)一般由軟磁材料制(zhi)成。一般分為直流電(dian)磁鐵(tie)和通(tong)信(xin)電(dian)磁鐵(tie)。通(tong)信(xin)電(dian)磁鐵(tie)的原(yuan)理(li)是什么？

通訊電(dian)磁鐵(tie)線(xian)圈插入時，鐵(tie)芯和電(dian)樞(shu)被(bei)磁化(hua)，變成兩個極(ji)性(xing)相反(fan)的(de)磁鐵(tie)。當吸附力超過(guo)張力彈簧的(de)反(fan)作(zuo)用(yong)力時，電(dian)樞(shu)轉向(xiang)點向(xiang)鐵(tie)心方向(xiang)移(yi)動(dong)。當線(xian)圈中的(de)電(dian)流低于(yu)一(yi)定值(zhi)或(huo)電(dian)源(yuan)中斷(duan)時，電(dian)磁吸收力低于(yu)張力彈簧的(de)反(fan)作(zuo)用(yong)力，電(dian)樞(shu)在反(fan)作(zuo)用(yong)力的(de)作(zuo)用(yong)下會回(hui)到原來的(de)釋放方向(xiang)。

值得注意的(de)(de)是(shi)，通(tong)信電(dian)磁(ci)(ci)(ci)鐵(tie)的(de)(de)電(dian)磁(ci)(ci)(ci)吸收力是(shi)由磁(ci)(ci)(ci)選(xuan)(xuan)機的(de)(de)磁(ci)(ci)(ci)場和磁(ci)(ci)(ci)選(xuan)(xuan)機的(de)(de)磁(ci)(ci)(ci)場組成(cheng)的(de)(de)兩個交變(bian)電(dian)場的(de)(de)磁(ci)(ci)(ci)場力加上直流凈重作用(yong)的(de)(de)，更容易釋(shi)放，所以輸出功(gong)率低(di)，變(bian)壓器鐵(tie)心體積大(da)(da)，線(xian)圈(quan)能(neng)耗高；功(gong)率因(yin)數低(di)，線(xian)圈(quan)電(dian)流大(da)(da)，發(fa)熱(re)嚴重，不(bu)僅浪費(fei)了電(dian)能(neng)，而且造成(cheng)線(xian)圈(quan)老化破壞過早。很糟糕。因(yin)此，大(da)(da)多(duo)數時(shi)候我(wo)們會選(xuan)(xuan)擇直流電(dian)而不(bu)是(shi)通(tong)訊電(dian)磁(ci)(ci)(ci)鐵(tie)。