CHAP. VIIU REACTION IN SYNCHRONOUS MACHINES 



147 



angle </> is due to the impedance of the armature. The expressions 

 i cos <j> and i sin <f> represent the energy component and the react- 

 ive component of the current respectively ; they are designated in 



FIG. 38. The performance diagram of a synchronous motor, with 

 non-salient poles. 



Figs. 37 ami :> s I>y h and 1-2. Denoting the ri^ht-hand sides of the 

 eqs. (71) and (72) by e\ and 2 for the sake of brevity, we have: 







