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
reducing the permeability, and {b) by lengthening the paths,both in air and in iron, that the lines of force follow. … Fig. 71- The composition of the two apparent magnetic fluxes inthe air-gap of a bipolar dynamo is illustrated in Fig. 71,which shows rectified curves of magnetic distribution underthe pole pieces and in the air-gap of the machine, ordinates ARMATURE REACTION. II3 of the curves representing flux…
Electric machinery
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