An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 253
222 ELECTRICITY AND MAGNETISM seen the distribution of magnetic flux in a two-pole machinewhen only the field coils are excited, and in diagram B thedistribution of magnetic flux when only the armature is carry-ing current and the brushes are in neutral position. It will … A B Fig. 156. — Armature reaction : A, flux due to field coils ; B, flux due to arma-ture windings ; C, resultant flux distribution. be noted that the armature magnetic field is at right anglesto that produced by the field magnets. It will also be observedin diagram C that the resultant…
Electricity · Magnetism
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