...Eddy currents are also called Foucault currents because J. B. Foucault (1855) demonstrated in an experiment that a rotating electrically conductive disk in a strong magnetic field experiences a strong braking force. This phenomenon is used in AC wattmeters and electromagnetic brakes. Generally, the Joule heat generated by eddy currents results in power loss, which is called eddy current loss (or eddy current loss). To avoid eddy current loss, the iron cores of AC generators, AC motors, transformers, etc. are made by stacking thin magnetic steel plates that are insulated from each other. *Some of the terminology that refers to "eddy current loss" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…渦電流によって,強い磁場中で回転する電気伝導体の円板が強い制動力を受けることをJ.B.L.フーコーが実験で示した(1855)ことからフーコー電流とも呼ばれ,この現象は交流の積算電力計や電磁ブレーキなどに利用されている。一般に渦電流によって生ずるジュール熱は電力の損失となり,これを渦電流損失(または渦電流損)という。交流発電機,交流電動機,変圧器などの鉄心は,渦電流損失をさけるため,お互いに絶縁した薄い磁性鋼板を重ねて作ってある。… ※「渦電流損失」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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