CHAPTER II. 



A. The Character of the Magnetic Field in the 



Polyphase Motor. 



18. The magnetic field in a three-phase current motor is pro- 

 duced by three windings, I, II, and III, Fig. 7. If the current in 



III I 



FIG. 7. 



Ill is a maximum, and if the currents vary acording to a simple 

 sine curve, then the currents in I and II are each equal to half the cur- 



II 



