THE INDUCTION MOTOR. 



This point lies very near the maximum ordinate of the semi-circle in 

 Fig. 15. The diameter of this circle is 122.5 amperes, the magnetizing 

 .current 4.5 amperes, hence 



a = = o . 0367 . 

 122.5 



The maximum power factor attainable is, equation (3), 



i 



COS tf ft = 



= 0.93 



2<7-f- I 



Fig. 15 and the data given above clearly show the inaccuracy which 



80 



20 



KILOWATTS 



FIG. 14. 



would arise if we were to use the short-circuit current as a means of 

 determining the absolute value of the leakage factor. 



26 



