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 52
fi-ll i 1,310 if.4irAV.Y5 ELECTRICITY Slip.—Instead of the magnetic needle as was used in thepreceding figures, a copper cylinder may he placed in a rotatingmagnetic field and it will be urged also to turn in the same direc-tion as the rotation of the field. PHASE A … Fig. 1.709.—Diagram of three phase, six pole field winding. There are 18 groups, and thesequence of phases is ABC in a counter clockwise direction. For a V connection, themiddle phase is reversed, so that a pole will be formed by the three consecutive phaseswhen the current is in the same direction…
Electrical engineering
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