. 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. Fig. 1505.—Allis Chalmers armature construction; view showing section of frame and twolayer winding. of the poles, is often quite different from a sine , the coefficient in equation (2) is often departed from,and in the general case equation (2) may be written E virt io8 (3) 1 224 IIA WKINS ELECTRICITY. where k is anumber whichmay hav
. 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. Fig. 1505.—Allis Chalmers armature construction; view showing section of frame and twolayer winding. of the poles, is often quite different from a sine , the coefficient in equation (2) is often departed from,and in the general case equation (2) may be written E virt io8 (3) 1 224 IIA WKINS ELECTRICITY. 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 Kapp. The value ofk is further in-fluenced by abreadth co-efficientwinding fac-tor. The effect ofbreadth indi stributedwindings isillustrated in CONSTRUCTION OF ALTERNATORS 1,225 Wire, Strap, and Bar Windings.—In the construction ofalternators, the windings may be of either wire, strap, or bar,according to which is best suited for the conditions to be met. Ques. What conditions principally govern the type ofinductor? Ans. It depends chiefly upon the current to be carried andthe space in which the inductor is to be placed.
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