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 34
eld struc-ture. In order to minimize eddy currents, such alternators mustaccordingly be built with thinner laminations and frequentlypoorer mechanical construction, resulting in increased cost ofthe machine. The large armature reaction results in a muchpoorer regulation than that obtained with… … FREQUENCY 25REQUIRES PER VOLT1,500 RPM.66,666 LINES OF FORCE Fig. 2,149.—Elementary alternator developing one volt at frequencies of 60 and 25, showingthe effect of reducing the frequency. Since for the same number of pole, the R.P.M.have to be decreased to decrease the frequency, increased flux is…
Electrical engineering
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