286 ALTERNATING CURRENTS 



motor is the Fynn motor. The stator of this motor has an ordinary 

 three-phase winding, like that of the Schiiler motor, only two phases 

 being in use at a time. The rotor has a double winding : an ordinary 

 continuous-current winding with a commutator and short-circuited 

 brushes, and a three-phase winding connected to three slip-rings. 

 The two windings are interconnected ; the ends of the three-phase 

 winding, instead of being connected star fashion to a neutral point, 

 as they are in an ordinary induction motor, are joined to three points 

 in the continuous-current winding 120 apart (in a two-pole motor), 

 as shown in Fig. 178. 



