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 382
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 … Fig. 340.—Distortion ofthe Magnetic Field Due tothe Cross-Magnetising Ef-fect of the Armature Cur-rent. One induced pole in each field core tends to strengthen the number of lines of force threading from the field to the arma-ture core, while the other induced pole tends to neutralizethe field…
Electricity · Magnetism
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