INDEX. 



353 



Excitation characteristic, see Char- 

 acteristics 



External characteristics, see Char- 

 acteristics 



External revolving field, 63 



External series characteristics, see 

 Characteristics 



External shunt characteristics, see 

 Characteristics 



Faraday's disk dynamo, 2 



Faraday's principle, i, 107, 133, 144, 

 181 



Ferguson, O. J., on rating of con- 

 verters 323 



Field compounding curve, see Char- 

 acteristics (armature) 

 definition of, 23 



Field magnets, i, 4 



Fischer-Hinnen, on wave analysis, 339 



Flather, dynamometers and the meas- 

 urement of power, 41 



Fleming, J. A., on wave analysis, 



339 

 Flux, magnetic, 2 



relation to electromotive force, 



144 



unit of, 1 6 

 Flux density, see Saturation 



in transformers, 139, 158 

 Form factor, definition of, 146 



effect on iron losses, 176 

 Fourier's series, 331 

 Franklin and Esty, on acyclic homo- 

 polar dynamos, 3 

 on maximum efficiency, 57 

 on predetermining alternator 



characteristics, 91 

 on synchronous motors, 319 

 on regulation of alternators, 100 

 Frequency, best frequency for differ- 

 ent machines, 64 

 changers, 291-294 

 effect on exciting current, 153 

 effect on transformer losses, 156 

 relation to speed, 62, 65 

 Friction and windage, law of, 47 



in series motors, 61 

 Full -load saturation curve, see Char- 

 acteristics 

 definition of, 26 



Gauss, 1 6 



Generators, alternating current, see 



Alternators 



armature reactions in, 6, 19 

 24 



Generators, asynchronous and syn- 

 chronous, 62 



brush position, 6 



characteristics of, see Character- 

 istics 



compounding by added turns, z\ 



compounding by armature char 

 acteristic, see Characteristics 



constant current, 127 



direct current, 1-26 



efficiency of, see Efficiency 



fields of, i, 4 



loading back, 55 



number of poles in, 27 



study of, 1-5 



tests on polyphase, 70 



torque in, 27, 28 

 Gilbert, unit defined, 16 

 Guilbert, on alternator regulation, 100 



Harmonic analysis, 339* 

 Harmonics in delta and star connec- 

 tions, 217-219 



Harrison, J., on wave analysis, 339 

 Hedgehog transformer, 130 

 Henderson and Nicholson, on regu- 

 lation of alternators, 100 

 Henry, unit of self induction, 108 

 Herdt, L. A., on regulation of alter- 

 nators, 100 

 Hobart and Punga, on regulation of 



alternators, 100 

 Homopolar dynamo, 2 

 Hopkinson, on motor testing, 56 

 Housman, R. H., on separation of 



losses in a motor, 50 

 Houston, E. J., on wave analysis, 339 

 Hutchinson, on motor testing, 56 

 Hutchinsin, C. T., on the induction 



motor for traction, 257 

 Hysteresis, coefficient of, 174 

 effect of aging on, 174 

 separation from eddy current loss 



in motors, 50-53 

 separation from eddy current 



loss in transformers, 175 

 variation with speed and flux, 46 

 Hysteretic angle of advance, 182 



Impedance, 103, 115 

 Impedance ratio, 80, 165 

 Impedance triangle, 109 

 Impedance voltage, 162 

 Inductance, 103-121 



calculation by impedance method, 

 116 



