358 



INDEX. 



Specht, H C, on speed control of in- 

 duction motors, 277 

 Speed control, of D. C. motors, 32 



of induction motors, 277 

 Speed equation of motors, 30 

 Speed regulation, 37 

 Speed, relation to frequency, 65 

 Split-field method of alternator test- 

 ing, 98 



Split-pole converter, 324 

 Squirrel cage winding, 260 

 Star-connected 2-phase system, 196 



3-phase system, 197, 204 

 Star current, 205 

 Star voltage, 205 

 Starting boxes, 34 

 Starting torque, of induction motors, 



260 



Static torque, 29 

 Stator, of induction motor, 257 

 Steam turbine, influence on design of 



alternators, 62 



Steinmetz, C. P., on choice of fre- 

 quency, 64 



on definition of a balanced poly- 

 phase system, 197 

 on form of external alternator 



characteristics, 89 

 on hysteresis exponent, 174 

 on monocyclic transformation, 



247 



on separation of iron losses, 176 

 on topographic method, 198, 199 

 on wave form, 217 

 Steinmetz and Bedell, on reactance, 



US 

 Stratton, S. W., on wave analysis, 



339 

 Stray power, 47 



method of motor testing, 41-61 

 Susceptance, 115 



of parallel circuits, 120 

 Swenson and Frankenfield, on motoi 



testing, 56 



Symmetrical polyphase system, 196 

 Synchronous converters, 321330 



best frequency for, 64 



current ratios of, 323 



induction generators with, 301 



inverted converter, 322, 329 



rating of, 323 



synchronizing of, 310, 311, 327 



voltage control of, 324, 325 



voltage ratios of, 322 

 Synchronizers, automatic, 313 

 Synchronizing, methods for, 310, 327 

 Synchronous booster, 324 



Synchronous commutator, 322 

 Synchronous generators, see Alterna- 

 tors 

 Synchronous impedance, 79, 80, 306, 



316 



Synchronous machine, definition, 62 

 Synchronous motors, 304-320 

 armature reaction of, 306 

 auxiliary winding for starting, 



304 



circle loci of, 320 

 counter-electromotive force in, 



305 



current locus of, 319 

 electromotive force method of 



treating, 306, 316, 320 

 hunting of, 308 

 induction generators with, 301 

 local reactance in, 306 

 magnetomotive force, method of 



treating, 307 

 maximum power of, 319 

 O-curves of, 315 

 power of, 307 



pulsating power and torque, 308 

 starting with alternating current, 



309 



synchronizing of, 310, 311 

 synchronous impedance of, 306, 



316 



synchronous reactance of, 316 

 synchroscopes for, 313 

 torque of, 307 

 v-curves of, 314 

 Synchronous reactance, 80, 316 

 Synchronous speed, 259 

 Synchronous watt, 29 

 Synchroscopes, 313 



Tandem operation of induction mo- 

 tors, 277 



T-connected transformers, delta equiv- 

 alent of, 249 



for 2- to 3-phase transforma- 

 tion, 243 



star equivalent of, 249 

 voltage and current relations, 248 

 T-connection of 3-phase circuits, 197. 



208 

 Tangent method of measuring power 



factor, 225, 232, 237 

 Teaser circuit of monocyclic sys- 

 tem, 247 



Temperature coefficients of copper, n 

 Temperature corrections, formula 

 for, 10 



