THE INDUCTION MOTOR. 



started, and we see thus that there must be another influence at work 

 which prevents the formation of the field A. This influence is ex- 

 erted by the currents passing through the coils of the field magnets. 



FIG. 51. 



The primary field must therefore be of such shape and strength, that 

 it may be considered as composed of two components, one exactly 



94 



