INDEX. 



Acyclic dynamo, 2 



Adams, C. A., on polyphase power 

 measurements, 230 



on synchronous motors, 316 

 Admittance, 104, 115 

 Aging of transformer iron, 174 

 Alternators, armature reaction of, 94 



auxiliary field winding, 69 



characteristics of, 62-72 



components of magnetic flux in, 



74 



composite winding, 69 

 constant current, 67, 88 

 constant potential, 67, 88 

 design as affected by the steam 



turbine, 62 



determining efficiency of, 71 

 electromotive force method for 



predetermining characteristics 



of, 75, 80-90 

 impedance ratio of, 80 

 Institute rule for regulation of, 



93 

 magnetomotive force method for 



predetermining characteristics 



of, 75, 9i 

 predetermining characteristics of, 



73-101 



regulation of, 66, 69 

 regulation at lower factors, 99 

 split-field method of testing, 98 

 synchronous impedance of, 79 

 synchronous reactance of, 80 

 tests at low power factors, 98 

 types defined, 63 

 variation of characteristics with 



power factor, 70 

 Aluminum rectifier, 322 

 Ammeter, correction when used with 



a wattmeter, 148 

 current transformers for, 149 

 methods of connecting when 



used with a wattmeter, 148 

 Ampere-turn method of testing alter- 

 nators, 75 

 method for synchronous motors, 



307 



Analysis of complex waves, 331 

 Apparent power, 113 



350 



Arakawa, B., on vector representa- 

 tion of non-harmonic alternating 

 currents, 182 

 Armature characteristic, of A. C. 



generators, 69 

 Armature characteristic, of D. C. 



generators, 23 



Armature insulation, drying by short- 

 circuit current, 78 



Armature reactions, demagnetizing 

 and cross-magnetizing effect 

 of, 6 



effect on alternator regulation, 73 

 effect on brush position, 6 

 effect on series characteristic, 9 

 in alternators, 74, 94 

 in D. C. generators, 19 

 in motors, 31 



in synchronous motors, 306 

 local self-induction of armature 



conductors, 19 



Armatures, closed coil, open coil, lap 

 or parallel winding, wave or 

 series winding, 3 

 function of, in generators, i 

 peripheral speed of, 6 

 resistance of, 12, 42, 76 

 Asynchronous machine, 62, 295 

 Automatic synchronizers, 313 

 Auto-transformers, 134-136 

 advantages of, 135 

 as boosters, 135 



for starting induction motors, 261 

 induction regulators as. 253 

 phase relation of primary and 



secondary currents, 135 

 step-up and step^-down, 135, 136 

 Auxiliary field winding, 69 

 Average value of a sine wave, 146 



Balance coil, 135 



Balanced load, 197 



Bedell, F., on separation of iron 



losses, 176 

 on transformer regulation, 167, 



193 



Bedell and Crehore, on equivalent re- 

 sistance and inductance, 119 



