們的(de)(de)(de)(de)(de)(de)低效(xiao)率(lv)和絕緣的(de)(de)(de)(de)(de)(de)難度生(sheng)產非(fei)常高(gao)電(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)(de)(de)(de)機(ji)器，靜電(dian)(dian)(dian)(dian)(dian)發(fa)生(sheng)器具(ju)有低額定(ding)功率(lv)，并且從未用(yong)于產生(sheng)商業上大量的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)力。它們 的(de)(de)(de)(de)(de)(de)實際應(ying)用(yong)是(shi)為(wei)早期的(de)(de)(de)(de)(de)(de)X射線管供(gong)電(dian)(dian)(dian)(dian)(dian)，后(hou)來在(zai)(zai)(zai)一(yi)(yi)些(xie)原(yuan)(yuan)子粒(li)子加速器中(zhong)供(gong)電(dian)(dian)(dian)(dian)(dian)。 電(dian)(dian)(dian)(dian)(dian)磁(ci)發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)的(de)(de)(de)(de)(de)(de)工作原(yuan)(yuan)理是(shi)由Michael Faraday在(zai)(zai)(zai)1831年至1832年間發(fa)現的(de)(de)(de)(de)(de)(de)。的(de)(de)(de)(de)(de)(de)原(yuan)(yuan)則(ze)，后(hou)來被稱為(wei)法拉第定(ding)律，是(shi)一(yi)(yi)個電(dian)(dian)(dian)(dian)(dian)動勢在(zai)(zai)(zai)環繞(rao)(rao)一(yi)(yi)個變(bian)化的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)導(dao)體產生(sheng)的(de)(de)(de)(de)(de)(de)磁(ci)通(tong)量。 他還建造了(le)(le) 臺(tai)電(dian)(dian)(dian)(dian)(dian)磁(ci)發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)，稱為(wei)法拉第盤 ; 一(yi)(yi)種單極發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)，使(shi)用(yong)在(zai)(zai)(zai)馬(ma)蹄形磁(ci)鐵的(de)(de)(de)(de)(de)(de)磁(ci)極之間旋轉的(de)(de)(de)(de)(de)(de)銅盤。它產生(sheng)了(le)(le)一(yi)(yi)個小的(de)(de)(de)(de)(de)(de)直流電(dian)(dian)(dian)(dian)(dian)壓。 由于磁(ci)盤中(zhong)不受磁(ci)場影響的(de)(de)(de)(de)(de)(de)區域(yu)(yu)中(zhong)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)(de)自逆(ni)流，這種設計是(shi)低效(xiao)的(de)(de)(de)(de)(de)(de)。雖然直接在(zai)(zai)(zai)磁(ci)體下方感(gan)應(ying)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)流，但是(shi)電(dian)(dian)(dian)(dian)(dian)流將在(zai)(zai)(zai)磁(ci)場影響之外的(de)(de)(de)(de)(de)(de)區域(yu)(yu)中(zhong)向后(hou)循(xun)環。該逆(ni)流限制了(le)(le)輸(shu)出(chu)(chu)(chu)到(dao)拾取(qu)線的(de)(de)(de)(de)(de)(de)功率(lv)，并引起銅盤的(de)(de)(de)(de)(de)(de)廢(fei)物(wu)加熱。后(hou)來的(de)(de)(de)(de)(de)(de)單極發(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)將通(tong)過使(shi)用(yong)圍繞(rao)(rao)盤周邊布置的(de)(de)(de)(de)(de)(de)磁(ci)體陣列來解(jie)決該問題，以在(zai)(zai)(zai)一(yi)(yi)個電(dian)(dian)(dian)(dian)(dian)流流動方向上保持穩定(ding)的(de)(de)(de)(de)(de)(de)場效(xiao)應(ying)。 另一(yi)(yi)個缺點(dian)是(shi)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓非(fei)常低，這是(shi)

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