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 1311
m Engineering easily removable field coils. If the windings are compound^the serieS;, and shunt coils are insulated separately. Thearmature is of the slotted drum type^ with either a two cir-cuity or multiple tj^e of winding. The number of poles ina rotary converter is dependent upon the speed of… … FiG. 601 WESTINGHOUSE COMPLETE ROTARY CONVERTER ARMATURE FROM THECOMMUTATOR SIDE, 300 K. W., 550 VOLTS, THREE-PHASE ture speed is limited by the maximum safe speed of theperiphery of armature and commutator. With a givenspeedy however^ the number of poles is proportional to thefrequency, and with a…
