Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 396
ter,vsince the alternating current cannot be employed to excitethe fields. The exciter may be either a separate dynamo oran independent direct current winding upon the alternatorshaft, Fig. 360, H. (h) Separate Coil, Self-contained Machines, C, Fig.360.—Separate coils wound on the armature core are… … 378 PRACTICAL ELECTRICITY. and shunt coils of F. The shunt coil is supplied from anexciter, while the main current, commuted, flows throughthe series field coils. This method is employed in compositewound alternators, a portion of the main alternating currentis commuted h}^ a special device called…
Electricity · Magnetism
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