270 INDEX 



Back amp. >>'<< Demagnetizing, Direct. 



leakage, description of 223 



Belts < in a D.C. machine 163 



i: 11 . 20-24 



relat ion for air 15 



Blondel diagram 154-155 



Breadth factor, definition of 65 



formula for 68 



Brush shift in D.C. machines 165 



Bus-bars, repulsion bet ween 248 



Cable, concentric, flux distribution in 189 



induction of a single phase 191 



Carter's curve for fringe permeance 95 



Castings 21 



Characteristic, active layer, definition of 168 



air 231 



load, definition of in alternator 141 



open circuit. See Saturation curves, and Exciting cur- 

 rent. 



phase, synchronous motor 142 



Circuit, a simple magnetic. (See also Magnetic circuit) 1 



magnetic, containing iron, series-parallel 29 



definition of 3 



Coercive force 32 



( 'ommutating poles, calculations for. (See also Interpoles) 173 



definition of and location 172 



Commutation, criterion of 235 



description of 233 



frequency of 236 



of a fractional pitch winding 238 



of a lap winding 235 



of a multiplex winding 238 



of a two circuit winding , 237 



vs. inductance 232 



Compensating winding for D.C. machine 174 



Complete linkages, definition of 181 



Compounding in a D.C. machine 170 



C ' unpression, lateral, in a magnetic field 244 



Computations for intcrpoles 173 



Condenser, synchronous 157 



Conductor, force on, in a magnetic field 256 



Cores of iron wire 41 



of revolving machinery, m.m.f . for 105 



of transformers, m.m.f for 81 



Core loss current, in an induction motor. See Core loss in revolving 

 machinery. 



