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Practical calculation of dynamo-electric machines; a manual for electrical and mechanical engineers and a text-book for students of electrical engineering: continuous current machinery; (1902)

Wiener, Alfred Eugene · New York, Electrical world and engineer · leaf 287

An illustration from Practical calculation of dynamo-electric machines; a manual for electrical and mechanical engineers and a text-book for students of electrical engineering: continuous current machinery;, 1902, leaf 287
ig- 159-—Horizontal Horseshoe Type. 2 Z (189) 240 DYNAMO-ELECTRIC MACHINES. Sl = surface of polepiece opposite bedplate (= half of exter-nal surface); S^ = end surface of polepiece; S -— half area of iron surface facing polepieces (or area ofportion opposite one polepiece). 3. Fourpolar Double… … Fig. 160.—Fourpolar Double Magnet Type. polepieces passing across the bedplate, those from the upperpair across the pole gap: r[/x (g + **) + S] g X (f+2h) 2 Z .(190) Since there are no further essential leakages in this type,formula (190) gives the entire relative permeance of the wastepaths for…

Electric machinery -- Design and construction · Electric machinery -- Direct current

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