File:Faraday disk generator.jpg
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[编辑]描述Faraday disk generator.jpg |
English: Drawing of Faraday disk, the first electromagnetic generator, invented by British scientist Michael Faraday in 1831. The copper disk (D) rotated between the poles of a horseshoe shaped magnet (A), creating a potential difference between the axis and rim due to Faraday's law of induction. If an electrical circuit such as a galvanometer was connected between the binding posts (B) and (B') the motion induced a radial flow of current in the disk, from the axle toward the edge. The current flows into the spring contact (m) sliding along the edge of the disk, out of binding post (B') through the external circuit to binding post (B) , and back into the disk through the axle. Turning it in the opposite direction reverses the direction of current. The caption also says that passing a current from a Bunsen cell (battery) through it would cause the disk to turn, making it function as an electric motor. The labeled parts are given in the caption as:
The caption describes it as 'Foucault's and Le Roux's apparatus' so this picture was not drawn from Faraday's original machine, but one owned by Faraday's contemporary French physicist Léon Foucault. The Faraday disk was an inefficient generator because counter-currents flowed back through regions of the disk outside the magnetic field. It was the first homopolar generator |
日期 | |
来源 | Downloaded from Émile Alglave & J. Boulard (1884) The Electric Light: Its History, Production, and Applications, translated by T. O'Conor Sloan, D. Appleton & Co., New York, p.224, fig.142 on Google Books |
作者 | Émile Alglave |
授权 (二次使用本文件) |
Public domain - published in USA before 1923 |
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[编辑]Public domainPublic domainfalsefalse |
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当前 | 2021年9月26日 (日) 07:30 | 1,920 × 1,500(1.31 MB) | Vort(留言 | 贡献) | better quality | |
2007年12月22日 (六) 03:34 | 487 × 382(35 KB) | Chetvorno(留言 | 贡献) | {{Information |Description=Drawing of Faraday disk, the first electric generator, invented by British scientist Michael Faraday in 1831. |Source=Downloaded from [http://books.google.com/books?id=zh5pbMMwARQC&pg=PA224 Émile Alglave & J. Boulard (1884) ' |
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