294 



INDEX 



Parallel working of rotary converters, 



219 



Perot, M., 103 



Phase-angle, determining, 139 

 -converters, 224 

 indicators, 108 

 Picon, M. R. V., 236 

 Polyphase alternators, ordinary form 



of, 9 



motors, symmetrical, case of, 19 

 synchronous motors, elementary 



expansion of, 9 



Power developed, curves indicating, 44 

 -factor of the generator, 192 



improving, 287 

 output, 50 



-values as function of the lag- 

 angle, 43 



Predetermination of V-curves, 57 

 Principles of the theory of two re- 

 actions, 237 

 Prony-brake-dynamometer, 134 



Reactance coil, use of, in 



value of, 183 

 Reactances, calculation of applied to 



alternator construction, 267 

 Reaction synchronous motors, 141 

 Reactions, practical calculations of, 



252 

 two, principles of the theory of, 



237 

 Reactive counter-ampere-turns of 



armature 241 

 current, curve of, 61 



determination of, 95, 198 

 expression for, 61 

 upper limit of, 202 

 values for a given voltage 

 variation as a function of the 

 load, 182 



Regulation of distribution-voltage, 85 

 Revolving field motors, xxi 



Rotary converters as generators, 224 

 as partial generators, 224 

 conditions of electric current 



supply to, 177 



characteristic features of, 194 

 eliminating causes of irregular 



operation, 213 



for transforming direct to alter- 

 nating current, 222 

 lag characteristics of, 203 

 parallel working of, 219 

 speed oscillations in, 220 

 under load, effective character- 

 istics of, 205 

 Ryan and Bedell, 103 



Saving in annual operating cost, 75 



in operating cost, table, 77 

 Self-excitation, 30 



-inductance of armature, 242 

 Separate excitation, 117 

 Series-excitation, 27 

 Short-period oscillations, 122 

 Shunt-excitation, 28 



-winding, possibility of suppress- 

 ing, 211 



Single-phase alternators, case of, 264 

 machines, starting, 112 

 synchronous motors, elementary 



expansion of, 14 



Soci6t6 1'Eclairage Electrique, type of 

 synchronous motors, table, 5 

 Speed-oscillations in rotary con- 

 verters, 220 

 Stability, influence of field-saturation 



on, 101 

 of synchronous operation, 1 1 



motors, determining, 51 

 variations of, with operating con- 

 ditions, 52 



Starting apparatus, accessory, 108 

 by alternating current, 106 

 by direct current, 106 

 of single-phase machines, 112 

 Steinmetz notation, 23 



