Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 240
o move back andmake contact with thestuds joined to the field-regulating resistance. Fig. 142 depicts aGeneral Electric Com-pany controller for 5-H.P. shop-tool motors. There arethree starting points, 21 forward and 11 reverse runningpoints. Speed control is effected by field regulation. A… … Fig. 141. MOTORS. 229
Electric machinery
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