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File:Gramme Ring - 4 coil.png

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Summary

Description
English: A four coil Gramme ring. The coils of A and A' sum together as do the coils of B and B', producing two pulses of power 90 degrees out of phase with each other. When coils A and A' are at maximum output, coils B and B' are at zero output.

Public Domain source:

  • Hawkins Electrical Guide, Volume 1
  • Chapter 14: The Dynamo: Current Commutation
  • Page 177, Figure 185
  • Copyright 1917 by Theo. Audel & Co.
  • Printed in the United States
For a list of all these illustrations used in Wikipedia please see the article w:Hawkins Electrical Guide.
Source Scanned by Dale Mahalko, Gilman, WI, USA
Author DMahalko (talk) 21:32, 12 January 2008 (UTC)
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current21:32, 12 January 2008Thumbnail for version as of 21:32, 12 January 20081,246 × 642 (55 KB)DMahalko== Summary == Separate excitation of an electric generator. DC generator with commutation is shown, but the principle also applies to AC alternators. '''Public Domain''' source: * Hawkins Electrical Guide, Volume 1, Page 177. * Copyright 1917 by Theo. Au
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