Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 236
Fig. 1505.—Allis Chalmers armature construction; view showing section of frame and twolayer winding. of the poles, is often quite different from a sine distribution.Hence, the coefficient 2.22 in equation (2) is often departed from,and in the general case equation (2) may be written E virt io8 (3)… … where k is anumber whichmay have dif-ferent values,according tothe construc-tion of the al-ternator. Thisnumber k iscalled theKapp becausejnificancewas first point-ed out by Prof.Gisbert Kapp. The value ofk is further in-fluenced by abreadth co-efficientwinding fac-tor. The effect ofbreadth indi…
Electrical engineering
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