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 404
dynamo. In the second method an ad-justable rheostat is placed in shunt with the series field mag-nets, Figs. 366, 367, and the main current divides in propor-tion to the resistances of the two circuits. The arm of the rheostat is auto- Series Field matically moved bya solenoid and corearrangement… … Fig. 367.—Regulating the Voltage of a SeriesDynamo by Shunting the Series Field. sistance, thereby shunting more current from the field circuit,and preventing the rise of E. M. F. When the external resist-ance is increased the resistance in the rheostat is automati-cally increased and more current…
Electricity · Magnetism
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