Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 381
windings, and produces magnetic poles in the arma-ture core which react upon the magnetic field and distort it.Suppose current to beflowing in the direc-tion indicated, fromthe armature windingsdepicted in Fig. 347,a N and a S-pole areproduced at diametri-cally opposite points,where the current… … Fig. 348.—Reaction of the Armature FieldUpon That of the Field Magnets. ture is placed in its field and current flows from it, Fig. 34 8,its poles induce two poles in each of the field cores by mag-netic induction, with the polarities as indicated. ARMATURES. 363
Electricity · Magnetism
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