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ELEMENTS OF ELECTRICAL ENGINEERING. 



227 is a diagram of a two-phase stator winding for the production 

 of four rotating magnet poles, a four-pole winding as it is called, 

 and Fig. 228 is a diagram of a three-phase stator winding for the 

 production of four rotating magnet poles. In each of these 

 diagrams the complete connections are shown for one phase only, 

 namely the A phase. The other phase, or phases, are exactly 



Fig. 228. 



like the A phase. The short radial lines in these diagrams 

 represent the portions of the windings which lie in the slots of 

 the stator iron, the curved lines outside of the radial lines repre- 

 sent the connections at one end, and the curved lines inside of 

 the radial lines represent the connections at the other end of the 

 stator. The following discussion of the action of the stator 

 windings applies to the two-phase winding shown in Fig. 227. 



From Fig. 227 it is evident that the stator conductors are ar- 

 ranged in groups or bands, that is, a band of conductors belong- 

 ing to the A phase, then a band of conductors belonging to the 

 B phase, and so on, and it is also evident that the current of one 



