THE INDUCTION MOTOR 



supply, the e.m.f. waves of which are shown in dotted lines 

 in Fig. 223. In the two windings of the stator there will 

 flow equal currents, each lagging behind the impressed 

 e.m.fs. by the same amount because of the similarity of 

 the windings. 



Phase 2 9 



FIG. 216. A Conventionalized Two-pole, Two-phase Stator. 



Analysis of the Field at Successive Instants. We are to 

 consider the magnetic field produced by the stator windings 

 at different times and therefore Fig. 217 is marked, h, t?, tz, 



FIG. 217. Voltages and Currents in the Two-phase Line Supplying 

 Power to. the Two-phase Induction Motor. 



etc. to represent the successive times. At a time ti, the 

 current /i is zero and hence poles 1 and 3 (Fig. 216) are not 

 excited and have zero magnetic flux in them. At the same 

 time the windings on poles 2 and 4 are carrying a maximum 



