ALTERNATING-CURRENT WINDING 229 



The above windings are half -coiled ; but it is easily seen that 

 whole-coiled windings may also be lap-coil wound, and Figs. 228 

 and 261, for instance, could be easily so transformed. 



The diagram for such a winding is shown in Fig. 266. The 

 winding shown has four slots per pole per phase and double 

 coils. A photograph of a winding of this type is given in Fig. 267. 



FIG. 268. Six-pole, Two-phase, Two-slot Wave Winding. 



WAVE WINDINGS. 



If we refer back to Figs. 218, 219, and 220, it will be seen that, 

 starting with conductor IA, the winding progresses round the 

 armature to 6A, taking in 2A, SA, 4A, and 5A successively, and 

 making a wave element. If, instead of conductor IA, we had two 

 conductors connected to two other conductors replacing 2 A, we should 

 obtain in place of Fig. 219 the two-phase diagram in Fig. 268. 

 Fig. 220 treated in a similar manner would give a three-phase 



