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 37
r the latter be the stationary or rotating member. A rotating field then may be defined as the resultant magneticfield produced by a system of coils symmetrically placed and suppliedwith polyphase currents. A rotating magnetic field can, of course, be produced by spinning ahorse shoe magnet around… … Fig. 1,656.—Aragos rotations. The apparatus necessary to make the experiment consists ofa copper disc M, arranged to rotate around a vertical axis and operated by belt drive, asshown. By turning the large pulley by hand, the disc M may be rotated with great rapidity.Above the disc is a glass plate…
Electrical engineering
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