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File:Gramme Ring Armature - Minimal Core Penetration.jpg

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Summary

Description
English: Original text from illustration: Figure 250: Distribution of magnetic lines of force through a Gramme ring. Since the metal of the ring furnishes a path of least reluctance, most of the magnetic lines will follow the metal of the ring and very few will penetrate into the aperture of the interior. This condition causes a serious defect in the action of ring armature armatures rendering the winding around the interior useless for the production of electromotive force. Hence, in ring armatures only about half of the winding is effective, the rest being "dead wire", adding its resistance to the circuit, thus decreasing the efficiency of the machine.
Source

Public Domain source:

  • Hawkins Electrical Guide, Volume 1
  • Chapter 17: The Armature, Page 225.
  • Copyright 1917 by Theo. Audel & Co.
  • Printed in the United States

Scanned by Dale Mahalko, Gilman, WI, USA

DMahalko (talk) 09:18, 13 January 2008 (UTC)
Author Unknown authorUnknown author

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Gramme_Ring_Armature_-_Minimal_Core_Penetration.jpg

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Date/Time Dimensions User Comment
2008-01-13 09:18 2101×1389× (90708 bytes) DMahalko == Summary == Original text from illustration: Figure 250: Distribution of magnetic lines of force through a Gramme ring. Since the metal of the ring furnishes a path of least reluctance, most of the magnetic lines will follow the metal of the ring and v

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current18:16, 12 February 2019Thumbnail for version as of 18:16, 12 February 20192,101 × 1,389 (89 KB)Betelgeuse1960Transferred from en.wikipedia via #commonshelper

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