226 



ELECTRICAL ENGINEERING 



a periodic pulsation of the reluctance of the magnetic circuit and 

 consequently a variation of the flux linking with the armature 

 winding. Fig. 193 represents one type of inductor alternator. 



FIG. 192. Revolving field alternator. 



FIG. 193. Inductor alternator. 



ff is the stationary field winding which produces the magnetic 

 flux <,<, in the direction indicated. a,b, a,b, are the armature 

 coils which may be connected either in series or in multiple. / 



