Xll. CONTENTS. 



CHAPTER X. 



PAGE. 



THE ROTARY CONVERTER 313 



General principles ; losses in a converter ; ratio of 

 conversion ; polyphase converters ; open circuit 

 characteristic ; load characteristic when run from direct- 

 current side ; calculation of voltage drop ; determination 

 of effect of variation of excitation ; characteristic when 

 driven from alternating-current side ; effect of variation 

 in excitation ; compounding of rotary converters. 



CHAPTER XI. 



THE INDUCTION MOTOR . . 341 



Production of a rotating field ; production of current 

 in the rotor winding ; magnetic reaction of rotor 

 current ; heating of rotor and turning moment ; value of 

 torque ; relation between slip and torque in ideal case ; 

 effect of magnetic leakage ; measurement of slip ; 

 measurement of resistance of windings ; speed regulation ; 

 braking and return of current to line ; static and running 

 no-load curves ; ratio of primary to secondary current ; 

 load tests ; variation of primary current, power 

 absorbed, efficiency, power-factor, and slip ; effect of 

 variation of rotor resistance ; determination of copper and 

 iron losses ; efficiency from no-load readings ; single-phase 

 induction motors ; starting devices for single-phase 

 motors ; induction motor diagrams ; the Heyland 

 diagram; experimental determination of Heyland 

 diagram. 



CHAPTER XII. 



THE ANALYSIS OF ALTERNATOR CURVES 420 



Composition of curves ; form of the wave ; analysis by 

 summation : outline of proof ; example of calculation ; 

 analysis by superposition : outline of proof ; example of 

 calculation. 



INDEX . . AT END 



