Kinsley — Discussion of Series Dynamo-Electric Machines. 121 



E 



E a 



E, 



20 181.5 118.0 167.0 



40 338.0 212.0 302.0 



60 474.0 288.0 423.0 



80 594.0 351.0 530.0 



100 7C0.0 404.0 625.0 



120 795.0 447.0 710.0 



E fl + Ri A 



B 



% 



163.0 .00648 .00590 +2.5 



302.0 .00605 .00530 0.0 



423.0 .00565 .00480 0.0 



531.0 .00530 .00439 —0.2 



629.0 .00500 .00404 —0.5 



717.0 .00473 .00372 —1.0 



a 



a 



The values of . , » and , . , ,. given on page 121 are 

 plotted. See fig. 7. 



As is seen a straight line averages the points very fairly 

 from i = 110 to i = 30. 



Fig. 3 



Series Dynamo Surface and Motor Characteristic. 

 -Design of Power Circuit. 



From the line we find that 



(20) 



n 

 n 



= .80 



(21) 



R 



n 



= 0.00179 



