Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1157
current and the changes occur about 100 times per second.Fig. 491 shows a cylindrical laminated core wound with are-entrant coil, and mounted on bearings within the field.This core will rotate because the alternating currentspassing through the field coils will induce currents in itswires, owing to… … Fig. 492three phase generator, and induction motor are from 5 to 10 per cent slower than those of the rotaryfield. If it were made to synchronize with the field it wouldhave no induced polarity, and no pull or torque would beexerted upon it. Therefore, it constantly falls behind,and the amount of…
