Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 393
thenumber of ampere-turns which are effective at that point. This is repre-sented by the length of the arrows in the figure. In order to calculate the excitation at various points on the peripherywe must observe that any Une of force is produced by the ampere-wireswhich it encircles. If there are q… … F ^ (f Fig. 388 If we plot the excitation at every point as ordinates on a base repre-senting the pole-pitch tt, we obtain the lower part of Fig. 388. BetweenA and B, and between B and D, the increase is uniform and is representedby straight lines. The mean excitation is obtained by finding the…
Electrical engineering
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