240 



ELECTRICAL ENGINEERING 



in six slots per pole. Fig. 210 shows a winding for the same 

 machine using only four of the six slots per pole as explained in 

 Art. 144. 



Fig. 211 shows a two-phase chain winding for the armature in 

 Fig. 209. The windings are distributed in three slots per phase 

 per pole. 



Four Pole, Single Phase, Double Layer Winding 



Four Pole, Two Phase, Doable Layer Winding 



Four Pole, I-hree Phase. Double Layer Winding 



FIG. 208. Concentrated double-layer windings. 



Fig. 212 shows a three-phase chain winding for the same arma- 

 ture, distributed in two slots per phase per pole. 



Figs. 213 to 216 show the double-layer windings corresponding 

 to Figs. 209 to 212. 



