Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1150
y with the generator^ and yet would make480 E. P. M. while the generator made 60 E. P. M. The production of the rotary field is the main reasonfor the generation of polyphase currents. Fig. 490 shows four coils of wire. Assume that thecoils B B receive an alternating current, and the coils A… … Fig. 491two phase rotating field coil and armature When the B current is at maximum, there will be es-tablished N and S magnet poles on a horizontal axis pass-ing through the center of the B coil. The A coils whenactive will establish poles on an axis perpendicular thereto. Poles at intermediate…
