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 370
Fig. 330.- -Four-Coil Siemens DrumArmature. DYNAMO ELECTRIC MACHINES. 351 the induced E. M. F. is that generated by one-half ofthe total conductors upon the core, and each half of the wind-ings deliver one-half of the total current flowing to the ex-ternal circuit. 329. Advantages of Drum and Ring… … Fig. 331.—Tooth-Core Armature Body With Two Formed Coils in Position The wound and formed coils are also illustrated. The armatureis intended for a six-pole field. of force is that part located only on the periphery of the ringwhile that on the ends and inside of the ring cuts no lines offorce, and…
Electricity · Magnetism
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