Image:Self Excited vs Magneto.png

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[edit] Summary

Paraphrased article description:

A self-excited shunt-wound DC generator is shown on the left, and a magneto DC generator with permanent field magnets is shown on the right. The shunt-wound generator output varies with the current draw, while the magneto output is steady regardless of load variations.

From illustration caption:

Circuit diagrams to illustrate the difference between a dynamo and a magneto. The former has its field magnets F F magnetized by means of a small current flowing around a shunt circuit. In a magneto the field magnets are permanently magnetized. The strength of the magnetic field of a magneto is constant while that of a dynamo varies with the ouput.

Public Domain source:

Hawkins Electrical Guide, Volume 1
Chapter 15: Classes of Dynamo
Page 183, Figure 188, 189
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 Hawkins Electrical Guide.

Scanned by Dale Mahalko, Gilman, WI, USA

DMahalko (talk) 20:20, 12 January 2008 (UTC)

[edit] Licensing

This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1923 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

File history

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	Date/Time	Dimensions	User	Comment
current	20:39, 12 January 2008	1,249×953 (94 KB)	DMahalko (Talk \| contribs)	(== 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 196. * Copyright 1917 by Theo. Au)