x CONTENTS 



CHAPTER XIV 



PAGBS 



129. Generator action of induction motor at hypersynchronous speed. Phase 

 relation of stator and rotor currents 130. Vector diagram of e.m.f.'s 

 and its transformation 131. Generalized circle diagram 132. Charac- 

 teristic features of induction generator 133. Speed control of induction 

 motors. Bheostatic control 134. Speed control by change in number of 

 poles 135. Tandem control. Multiple motor method 136. Single- 

 phase induction motors. Theory of motor at rest 137. Torque exerted 

 by single-phase induction motor when running 138. Effect of varying 

 resistance of rotor circuits 139. Starting of single-phase induction 

 motors 219-235 



CHAPTER XV 



140. Rotary converters and their uses 141. Voltage ratio in converters 

 142. Ratio of currents 143. Relative outputs of armature when gene- 

 rating continuous, single-, two-, and three-phase currents 144. Heating 

 of single-phase converter 145. Heating of converter having N slip-rings 

 146. Effect of number of slip-rings on output of converter 147. Six- 

 phase converter supplied from three-phase mains 148. Twelve-phase 

 converter 149. Hunting of rotary converters 150. Voltage regulation 

 of rotary converters 161. Starting of rotary converters 152. Racing 

 of inverted rotaries 153. Converters v. motor-generators . . 236-258 



CHAPTER XVI 



154. Compensated induction motor 155. Equivalent of compensated motor 

 156. Effect of varying number of rotor conductors. Speed control 

 157. Effect of brush displacement 158. Case of synchronous speed 

 159. Latour alternator 160. Heyland alternator . . . 259-270 



CHAPTER XVII 



161. Single-phase commutator motors 162. Series motor. Circle diagram 

 163. Conditions determining power factor of series motor 164. Com- 

 pensated series motor 165. Methods of obtaining sparkless running 

 166. Repulsion motor 167. Compensated repulsion motors 168. 

 Atkinson's repulsion motors 169. Mixed-action commutator motors 271-286 



INDEX . 287-291 



