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 80
HINERY. them, are applied. Laminating the core in this way doesnot completely prevent the flow of eddy currents, for smallE.M.F.s will still be induced in each lamina which producesthem. The eddy current loss, being proportional to thesquare of the thickness of laminations, would be lowered byusing… … Fig. 33- For the smaller machines, having armatures less than 16inches in diameter, the discs are punched in one piece, andusually take the form shown in Fig. 33. Sometimes aper-tures are provided in the laminations about the axis, and ARMATURES. 69 these constitute air passages through the core,…
Electric machinery
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