CONTENTS xi 



CHAPTER X 



PAGE 



THK SYNCHRONOUS MOTOR 305 



123. The Synchronous Motor . 305 



1_M Principles of Operation 305 



125. Effect of Loading the Synchronous Motor 306 



126. Effect of Increasing the Field Excitation 309 



1-J7. Effect of Decreasing the Field Excitation 312 



128. Synchronous Motor V -curves 315 



129. Amortisseur or Damper Windings 318 



130. Starting the Synchronous Motor 320 



131. The Synchronous Condenser as a Corrector of Power-factor . 322 



132. The Synchronous Motor as a Corrector of Power-factor. . . 324 



133. The Synchronous Motor as a Regulator of Voltage 326 



134. Industrial Applications of the Synchronous Motor 329 



135. Synchronous Motors of Very Small Size 332 



CHAPTER XI 



i -i KKS: THE SYNCHRONOUS CONVERTER 333 



136. Methods of Obtaining Direct Current from Alternating 



Current 333 



137. Types of Rectifiers and Converters 334 



138. Principle of the Synchronous Converter 342 



' Polyphase Converters 344 



110. Single-phase Voltage Ratios in a Synchronous Converter 346 



111. Polyphase Voltage Ratios in a Synchronous Converter . . . 346 



142. ( 'ui rent Ratios in a Synchronous Converter 348 



143. Conductor Currents in the Armature of a Converter ... 351 

 1 11. KfTect of Number of Phases and of Power-factor on the Output 



of a Synchronous Converter 



145. KfTect of Power-factor on Converter Rating 



146. Armature K'-aetion in a Converter -">'' 



1 17. Voltage < 'ontrol .... 



148. Kxperirnental Determination of Voltage and Current Rela- 



tions in a ( lonverter .... 



149. Synchronous-corr. ; iM-ct inns 

 l.M). The Inverted Synchronous Converter 



I ".!. Starting the Synrhronoiis Converter from the Altern:iting-eur- 



rent - 

 M.-tho.ls ,,f Obtaining Correct Pohritv 



M of an Au\r 



l.'.l Starting Synchronous Converter from the Direct-current 

 .... 



D of Sync! onverters 



The Three-wire Converter . 375 



