DIRECT-CURRENT MACHINERY 



153 



Generator 







" 



Motor 



I I I I I I I II .1 I I I I I I I I I I I I I 

 M* M- l> U- I^J+ LJ- 



FIG. 117. Six-pole series-drum winding, progressive. 



If 



(198) 



the winding starting from bar 1 goes once around the armature and 

 is connected to bar 2. It is therefore called a progressive winding. 

 (Fig. 117.) 



