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.
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=== 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
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