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 47
Fig. I.6S0.—Production of a rotating magnetic field by three 1shown is tapped at points A. B. and C. 120° apart, and cphase alternator. As described on page 1,304, a rotatiin a manner similar to the two phase method. PHASE B … Fig. 1.6S6.—Diagram of three phase, four pole Y connected field winding. 1,306 HAWKINS ELECTRICITY At the instant when the current a, flowing in at A, is at its maximum,two currents b and c, each one-half the value of a, will flow out B and C,thus producing a negative pole at A and a positive pole…
Electrical engineering
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