框架式河源電磁鐵又稱箱式電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)，因(yin)為(wei)它(ta)(ta)的(de)(de)形(xing)狀(zhuang)是方形(xing)的(de)(de)。這(zhe)種(zhong)框架電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)是一(yi)種(zhong)產生(sheng)電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)的(de)(de)設備。當變(bian)(bian)壓(ya)器(qi)鐵(tie)心在(zai)外旋轉(zhuan)，其輸出功率與(yu)導(dao)電(dian)(dian)(dian)繞組電(dian)(dian)(dian)阻(zu)一(yi)致時，帶電(dian)(dian)(dian)流的(de)(de)線圈具有與(yu)磁(ci)(ci)(ci)(ci)鐵(tie)相同的(de)(de)磁(ci)(ci)(ci)(ci)性。我們通(tong)常把它(ta)(ta)做成(cheng)條狀(zhuang)或(huo)蹄狀(zhuang)，使(shi)它(ta)(ta)的(de)(de)變(bian)(bian)壓(ya)器(qi)鐵(tie)心更容易磁(ci)(ci)(ci)(ci)化。另外，為(wei)了使(shi)電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)立即斷電(dian)(dian)(dian)消(xiao)磁(ci)(ci)(ci)(ci)，我們經常采(cai)用(yong)快速(su)消(xiao)磁(ci)(ci)(ci)(ci)的(de)(de)軟鐵(tie)或(huo)硅鋼材(cai)料制作。這(zhe)種(zhong)電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)插上電(dian)(dian)(dian)源(yuan)就會有磁(ci)(ci)(ci)(ci)性。當電(dian)(dian)(dian)源(yuan)關閉(bi)時，磁(ci)(ci)(ci)(ci)場將消(xiao)失。方形(xing)電(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)在(zai)我們的(de)(de)日常生(sheng)活中(zhong)有很(hen)多用(yong)途(tu)，因(yin)為(wei)它(ta)(ta)的(de)(de)產生(sheng)也使(shi)發電(dian)(dian)(dian)機(ji)組的(de)(de)輸出功率有了很(hen)大的(de)(de)提高。

電磁鐵交流原理

我們(men)先(xian)來看(kan)看(kan)電(dian)(dian)磁鐵(tie)(tie)(tie)(tie)的組成(cheng)原(yuan)理：電(dian)(dian)磁鐵(tie)(tie)(tie)(tie)主要由(you)線圈、鐵(tie)(tie)(tie)(tie)芯和(he)電(dian)(dian)樞組成(cheng)。鐵(tie)(tie)(tie)(tie)芯和(he)電(dian)(dian)樞一(yi)般(ban)由(you)軟磁材(cai)料制成(cheng)。一(yi)般(ban)分為直流電(dian)(dian)磁鐵(tie)(tie)(tie)(tie)和(he)通信(xin)電(dian)(dian)磁鐵(tie)(tie)(tie)(tie)。通信(xin)電(dian)(dian)磁鐵(tie)(tie)(tie)(tie)的原(yuan)理是什么？

通訊電磁鐵線圈(quan)插(cha)入時(shi)，鐵芯(xin)和電樞被磁化，變(bian)成(cheng)兩個極性(xing)相反(fan)的(de)磁鐵。當吸(xi)附力超過張(zhang)力彈簧(huang)的(de)反(fan)作(zuo)用(yong)力時(shi)，電樞轉(zhuan)向(xiang)(xiang)(xiang)點向(xiang)(xiang)(xiang)鐵心方向(xiang)(xiang)(xiang)移動。當線圈(quan)中的(de)電流低于一定值(zhi)或電源中斷時(shi)，電磁吸(xi)收(shou)力低于張(zhang)力彈簧(huang)的(de)反(fan)作(zuo)用(yong)力，電樞在反(fan)作(zuo)用(yong)力的(de)作(zuo)用(yong)下(xia)會回到原來的(de)釋放方向(xiang)(xiang)(xiang)。

值(zhi)得注意的(de)(de)是，通(tong)信電(dian)(dian)磁(ci)鐵的(de)(de)電(dian)(dian)磁(ci)吸收力是由(you)磁(ci)選機(ji)的(de)(de)磁(ci)場(chang)和(he)磁(ci)選機(ji)的(de)(de)磁(ci)場(chang)組成的(de)(de)兩個(ge)交(jiao)變(bian)電(dian)(dian)場(chang)的(de)(de)磁(ci)場(chang)力加上直(zhi)流(liu)凈重作用的(de)(de)，更容易釋放(fang)，所以輸(shu)出功(gong)率低(di)，變(bian)壓器鐵心體積大，線圈(quan)(quan)能耗(hao)高；功(gong)率因數(shu)低(di)，線圈(quan)(quan)電(dian)(dian)流(liu)大，發熱嚴(yan)重，不(bu)僅浪費(fei)了電(dian)(dian)能，而(er)且造成線圈(quan)(quan)老化破壞過早。很糟糕。因此(ci)，大多(duo)數(shu)時候(hou)我們會(hui)選擇直(zhi)流(liu)電(dian)(dian)而(er)不(bu)是通(tong)訊(xun)電(dian)(dian)磁(ci)鐵。