278 INDEX 



PAGE 



Magnetization curves. (See also Saturation curves.) 20-24 



Magnetizing current vs. exciting current 80 



Magnetism, cause of 1,4 



M.in.f. or magneto motive force, definition of 5 



for air-gap 89 



for armature cores 105 



for a D.C. machine to compensate for distortion 168 



for field frames 106 



for field poles 107 



for teeth, saturated 101 



for teeth, tapered 100 



gliding 126 



in induction machines, higher harmonics of 136 



of field, in a loaded D. C. machine 170 



of windings, concentrated 121 



distributed single phase 123 



distributed polyphase 128 



relations in an induction machine 132 



a synchronous machine 143 



wave, harmonics of 123, 136 



Maxwell, definition of 6 



Measurement of core loss 44 



of hysteresis 40 



of inductance 219 



Mechanical analogue of hysteresis 36 



of inductance . . 185 



force. *See Force, mechanical. 



Methods of inducing e.m.f 55 



Molecular magnets 34 



Multiplex windings, commutation of 238 



Mutual induction, in transmission lines 205 



in the windings of machines 219 



See also Transformer action 55 



Neutral zone, in D.C. machine 163 



Ohm's law for the magnetic circuit 7 



Open circuit characteristic. See Saturation curves. 



current. See Exciting current. 



Overload capacity of a synchronous motor 148 



Parallel combination of permeances 16 



-series circuits containing iron 29 



Partial linkages, definition of 181 



Perm, definition of 9 



Permeability curves 24 



definition of 11 



