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 210
or arm and of thebrush holder is obtained bymeans of a small motorwhose field is sneaked from the main magnets of themachine. This motor is operated by a device shownin Fig. 121. The whole device is inserted in series withone of the mains from the generator. The right-handlever is of insulating… … Fig. 120. GENERATORS. 199 The magnet and spring are so adjusted that when the nor-mal current is flowing, both a and b are in contact with theleft lever, and the current flows in the three shunt paths,R, R^, and R^. There will be no current in the armatureof the regulating motor, since the…
Electric machinery
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