Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 182
cm,= 70°,= 15 %.= 37 sq. cm. For the cross-section of the armature core normal to the flux, we haveAa = 0-85 (D — Z>o — 2<?). Z, = 70 sq. cm. 57 Characteristics of Separately-excited Dynamo 167 To find the effective cross-section of the teeth we must subtract the sumof all the slot-widths… … Fig. 151 If we make the simple but approximate assumption that the lines offorce cross the air-gap in the manner shown in Fig. 152 the cross-section ofthe gap Ag is the mean of the area of the pole-face and the total area ofthe tops of the teeth facing the pole. If the double air-gap has a length…
Electrical engineering
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