454 INDEX 



PAGE 



Armature winding, current capacity of 100 



for continuous-current machine 73 



for polyphase alternators 234-235 



for single phase alternators 233 



Asynchronous generator 350 



Autotransformer, operation of 299 



Auxiliary field poles 38 



Auxiliary pole synchronous converter 37 



Balanced polyphase system 401 



three wire system 136 



Bar winding for rotor of an induction motor 337 



Bars, form and number of, in a commutator 53-56 



Bearings, heating of 441 



Bipolar field frame 28 



Braking, dynamic, by induction motors 351 



Bracing of an armature winding 242 



Bridge control of railway motors 181 



Brush contact, IR drop in 63 



power lost in 189 



resistance, limits use of carbon brushes 63 



Brush holders, function and construction of 59 



Brush lifting mechanism on synchronous converters 381 



Brushes, effect of shifting, on speed of a motor 166 



on a commutating pole motor 168 



on voltage of a generator 123 



fitting, on a commutator 433 



material used for 57 



proper pressure for 62 



safe current for 58 



spacing of 431 



Building-up of a self-excited generator 129 



, failure of, due to dirty commutator 444 



high resistance in field rheostat .... 443 



incorrect field connection 445 



no residual magnetism 445 



open filed circuit 443 



speed too low 446 



wrong position of brushes 445 



Bus-bars 142 



Capacity of a condenser 218 



