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 124
Fig. 69. 112 DYNAMO ELECTRIC MACHINERY. generator because it increases the reluctance in two ways,— {a) by saturating the iron at the pole pieces and thus … reducing the permeability, and {b) by lengthening the paths,both in air and in iron, that the lines of force follow.
Electric machinery
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