APPENDIX B. 



373 



Figure 6 shows both the stator and rotor conductors. The 

 rotor is understood to travel at a slower speed than the magnetism 

 BB of Fig. 5, and therefore the rotor conductors are being con- 

 tinually cut by the traveling flux so that electromotive forces 

 are induced in the rotor conductors. These electromotive 

 forces produce currents in the rotor conductors as represented 

 by the dots and crosses in Fig. 6. The magnetizing action of 

 these rotor currents is balanced by the magnetizing action of 



stator iron 

 gap space 

 rotor iron 



x*"f6 (or e"or 







r> 



curves moving 



Fig. 6. 



additional currents in the stator conductors. These additional 

 currents in the stator conductors are called the load currents of 

 the motor to distinguish them from the currents which are rep- 

 resented in Figs. 4 and 5 (magnetizing currents). A careful study 

 of Figs. 5 and 6 will enable one to understand the time-phase 

 relations of all the electromotive forces and currents involved in 

 the action of the motor, and it also will show the interesting space 

 relations between the magnetizing 'currents and the load currents 

 in the stator winding. Thus, the magnetizing currents in the stator 

 windings are at their maximum values in the regions between 

 adjacent polar areas as shown in Fig. 5, whereas the load currents 



