孟銅絲(si)
待議
錳銅絲相當于一個低值(zhi)電阻(zu)器,用于電流取樣,依據的是歐姆定理,電阻(zu)固定,電壓正(zheng)比于電流。
錳銅絲作為(wei)電流梗(geng)頂盾雇墉概墮誰乏京(jing)取樣器的(de)特點(dian)是溫漂系數小。
錳(meng)銅(tong)電(dian)阻(zu)(zu)(zu)絲(si)是電(dian)流測(ce)量(liang)(liang)中很(hen)常用取樣(yang)電(dian)阻(zu)(zu)(zu),錳(meng)銅(tong)絲(si)相當于一個低值電(dian)阻(zu)(zu)(zu)器,此(ci)時(shi)電(dian)壓與(yu)電(dian)流成正比,其特點在于溫度(du)漂移量(liang)(liang)非常小(xiao)。經過(guo)(guo)測(ce)試,在1Ω的(de)康(kang)錳(meng)銅(tong)電(dian)阻(zu)(zu)(zu)絲(si)上通過(guo)(guo)約(yue)2A電(dian)流,由于產生的(de)熱量(liang)(liang)引起(qi)的(de)升溫,只會引起(qi)0.02Ω左右的(de)阻(zu)(zu)(zu)值變化,對電(dian)流的(de)穩定起(qi)了(le)很(hen)重要的(de)作用。另一方面,1Ω的(de)康(kang)錳(meng)銅(tong)電(dian)阻(zu)(zu)(zu)梗頂盾雇墉概墮誰乏京絲(si)約(yue)長1m,由于和外(wai)界接觸面積大(da),即(ji)使通過(guo)(guo)大(da)電(dian)流也能(neng)很(hen)快的(de)散熱,進一步(bu)的(de)減小(xiao)溫度(du)漂移帶來(lai)的(de)影響。
孟(meng)銅絲的簡介
銅(tong)鎳(nie)合金(jin)絲是以(yi)(yi)銅(tong)鎳(nie)為(wei)主要成份的(de)(de)電(dian)(dian)(dian)阻合金(jin)。特點(dian):具有(you)較(jiao)(jiao)低的(de)(de)電(dian)(dian)(dian)阻溫(wen)度(du)系(xi)數(shu),較(jiao)(jiao)寬的(de)(de)使用(yong)溫(wen)度(du)范圍(480℃以(yi)(yi)下),加(jia)工性(xing)能良(liang)好,具有(you)良(liang)好的(de)(de)焊接性(xing)能。主要用(yong)于(yu)制(zhi)作(zuo)儀(yi)器儀(yi)表,電(dian)(dian)(dian)子以(yi)(yi)及工業設(she)備中的(de)(de)電(dian)(dian)(dian)子元件。此(ci)外(wai)還(huan)有(you)一(yi)種新康(kang)銅(tong)電(dian)(dian)(dian)阻合金(jin),為(wei)銅(tong)鐵基同合金(jin),它具有(you)與(yu)康(kang)銅(tong)一(yi)樣的(de)(de)電(dian)(dian)(dian)阻率,基本(ben)相(xiang)近(jin)似的(de)(de)電(dian)(dian)(dian)阻溫(wen)度(du)系(xi)數(shu),和相(xiang)同的(de)(de)使用(yong)溫(wen)度(du)。新康(kang)銅(tong)與(yu)康(kang)銅(tong)電(dian)(dian)(dian)阻合金(jin)相(xiang)比(bi)由于(yu)不(bu)含價(jia)(jia)格較(jiao)(jiao)高的(de)(de)鎳(nie),而具有(you)低價(jia)(jia)格的(de)(de)優勝,但抗氧化性(xing)能比(bi)康(kang)銅(tong)差(cha)。在(zai)比(bi)較(jiao)(jiao)多的(de)(de)方面(mian)能夠替代康(kang)銅(tong)絲電(dian)(dian)(dian)阻合金(jin)。在(zai)穩壓電(dian)(dian)(dian)源(yuan)設(she)計(ji)中作(zuo)用(yong):過流保護,測試負(fu)載電(dian)(dian)(dian)流。
孟銅絲的原理
康(kang)(kang)銅(tong)是以銅(tong)鎳為主要(yao)成份的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)合(he)金(jin)。特點:具(ju)有較低(di)的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)溫(wen)度(du)(du)系數,較寬的(de)(de)使用溫(wen)度(du)(du)范圍(480℃以下),加工性能良(liang)好,具(ju)有良(liang)好的(de)(de)焊(han)接(jie)性能。主要(yao)用于制作儀器(qi)儀表(biao),電(dian)(dian)(dian)(dian)(dian)子(zi)以及(ji)工業設(she)備中的(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)元件。此(ci)外(wai)還(huan)有一種新(xin)康(kang)(kang)銅(tong)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)合(he)金(jin),為銅(tong)鐵基(ji)同合(he)金(jin),它具(ju)有與(yu)康(kang)(kang)銅(tong)一樣的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)率,基(ji)本相近似的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)溫(wen)度(du)(du)系數,和相同的(de)(de)使用溫(wen)度(du)(du)。新(xin)康(kang)(kang)銅(tong)與(yu)康(kang)(kang)銅(tong)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)合(he)金(jin)相比(bi)(bi)由于不含價格較高的(de)(de)鎳,而具(ju)有低(di)價格的(de)(de)優勝,但抗氧化性能比(bi)(bi)康(kang)(kang)銅(tong)差。在(zai)比(bi)(bi)較多的(de)(de)方面能夠(gou)替(ti)代康(kang)(kang)銅(tong)絲電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)合(he)金(jin)。在(zai)穩壓電(dian)(dian)(dian)(dian)(dian)源設(she)計中作用:過流保護(hu),測試負載電(dian)(dian)(dian)(dian)(dian)流。
孟(meng)銅(tong)絲的技術參數(shu)
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