Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1153
ch and causetrouble. If the current in the series field acts in the same direc-tion as that of the shunt fields, the motor will slow upsome when a heavy load comes on, but will take care of 1118 Steam Engineering the load without much trouble. Fig. 489 shows a start-ing box arranged as a speed… … Fig. 489 intermediate point the motor will run at reduced speed.This sort of speed regulation can be used only where theload on the motor is quite constant. If the load varies, thespeed will vary. Another and a better way of varyingthe speed of motors consists in cutting a variable resist- Electric…
