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File:Faraday disk generator.jpg

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摘要

描述
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:
  • (A) inducing magnet
  • (D) induced disk
  • (B) binding-screw for current entering or exiting axis of disk
  • (B') binding-screw for current entering or exiting circumference of disk
  • (m) rubber (sliding spring contact) for edge of disk.

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

Alterations to image: cropped out caption and list of parts.
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
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(二次使用本文件)
Public domain - published in USA before 1923

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Public domain
Public domain
这个媒体文件在美国属于公有领域。这适用于版权过期的美国作品,通常因为其首次出版于1929年1月1日之前,或即便当天或以后出版,其并未包含版权通告或获得版权回溯。查看这个页面可以获取到更多的解释。

United States
United States
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当前2021年9月26日 (日) 07:302021年9月26日 (日) 07:30版本的缩略图1,920 × 1,500(1.31 MB)Vortbetter quality
2007年12月22日 (六) 03:342007年12月22日 (六) 03:34版本的缩略图487 × 382(35 KB)Chetvorno{{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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