File:Hawkins Electrical Guide - Figure 291 - Formation of eddy currents in a solid bar inductor.jpg

Illustration Description

Figure 291 -- Formation of eddy currents in a solid bar inductor

(Paraphrasing for modern English)

In figure 291, a solid bar inductor on a rotating armature is just passing under the tip of the pole piece N of the field magnet. Note the uneven distribution of the lines of force across the bar inductor. The magnetic field is more concentrated and thus stronger on the left edge (a,b) while the field is weaker on the right edge (c,d). Since the two edges of the bar move with the same velocity, this difference in field strength across the bar creates whirls or current eddies within the copper bar.

Public Domain Source

• Hawkins Electrical Guide, Volume 1
• Chapter 19: Theory of the Armature
• Page 271, Figure 291
• Copyright 1917 by Theo. Audel & Co.
• Printed in the United States

Upload Notes

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See Also

For a list of all these illustrations used in Wikipedia please see the article Hawkins Electric Guide on the English Wikipedia.

Licensing

	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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