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 103
of laminated wroughtiron, thereby reducing the detrimental effects of eddy cur-rents induced in the pole faces by the flux variation occa-sioned by the slots in the revolving armature core. In the usual designs of direct-current dynamos, the ratioof the peripheral length of the pole face to the… … Fig. 54. Fig. 54 shows the complete field-magnet frame of aCrocker-Wheeler generator. This frame is of cast iron,and the round poles are of cast steel provided with remov-able cast-iron shoes, which are clamped in place after thefield coils have been assembled. 92 DYNAMO ELECTRIC MACHINERY. 46.…
Electric machinery
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