414 



INDEX 



Compound generators, parallel opera- 

 tion of, 195. 



Compounding curves of alternator, 

 268. 



synchronous motor, 274. 

 rotary converters, 388. 

 Compound motor, characteristic 



curves, 217. 

 Concatenation of induction motors, 



347. 



Condenser, electric, 18. 

 Condensers, capacity of, 18-24. 

 energy stored in, 27. 

 in multiple, 25. 

 in series, 26. 



Condensive reactance, 108. 

 Conductance, 76, 131. 

 Conductivity of aluminum, 76. 



copper, 76. 

 Conductor, 1. 

 Constant-current transformer, 318. 



potential transformer, 290. 

 Converter, armature winding of, 369. 

 frequency, 393. 

 synchronous, 369. 

 Corona, 41. 

 Core-loss current, 290. 

 Coulomb, definition, 2. 

 Cross currents in parallel operation 



of alternators, 282-284. 

 Cross-magnetizing armature m.m.f., 



172. 



Current-carrying capacity of wires, 

 81. 



D 



Damping grids, 279. 

 Delta connection, 232. 

 Demagnetizing armature m.m.f., 173. 

 Diameter of circular locus of induc- 

 tion motor, 336. 

 Dielectric constants, 3. 

 flux, 3. 



flux density, 3. 

 strength, 40. 

 Direct-current generator, 144. 



motor, 199, 



Dispersion coefficient, 163. 

 Distribution factor of windings, 243. 



Distribution of flux in the air gap, 170. 



potential, 8. 

 Double-current generator, 390. 



windings, 147. 



Drum windings, multiple, 148. 

 series, 151. 



Eddy current loss in armature iron, 

 213. 



transformer iron, 307. 

 Effective value of a sine wave, 102. 

 Efficiency of alternating-current series 

 motor, 364. 

 direct-current generators and 



motors, 214. 



mercury arc rectifier, 396. 

 Electric energy, units of, 53. 

 Electrification, 1. 

 Electromagnetics, 2. 

 Electromotive force equation of an 

 alternator, 228. 



of a direct-current generator, 



160. 



forces in an alternator, 260. 

 Electrostatic field, 3. 

 Electrostatics, laws of, 2. 

 Elimination of harmonics by short- 

 pitch windings, 247. 

 Energy loss due to hysteresis, 74. 

 stored in electrostatic field, 29. 



magnetic field, 67. 

 Equalizer connections, 196. 



rings, 151. 



Equipotential surfaces, 11. 

 Equivalent charges, 10. 

 Exciting current of a transformer, 

 290, 294. 



Farad, definition of, 19. 



Field characteristic of direct-current 



generator, 189. 

 electrostatic, 3. 



excitation in direct-curront ma- 

 chines, 158. 



in rotary converters, 371. 

 magnetic, 43. 



