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 193
two outsidewires, the neutral wire connecting with the middle point ofthe battery; {c) balancers, §111, which are two mechani-cally coupled dynamos connected across the outside wires,one of which, if the system be unbalanced, will run as amotor and drive the other as a generator which… … I82 DYNAMO ELECTRIC MACHINERY. and negative brushes ; but, for satisfactory current collec-tion, the coil short-circuited by this additional brush mustlie in a weak magnetic field. Such an arrangement wasdeveloped by Dettmar, and is shown in Fig. io8. This illustrates a four-pole field-magnetframe…
Electric machinery
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