INDEX 



PACK 



Active layer characteristic, definition of 168 



Aging of laminations 49 



Air-gap ampere-turns 89 



factor, definition of 90 



factor for induction machines 98 



flux, nature of its distribution 88 



permeance and m.m.f ., accurate method 92-97 



simplified, permeance of 89 



Alternating current electromagnets, tractive effort of 254 



machines, torques of 259-260 



machines. See also Synchronous and Induction. 

 Alternator. See Synchronous machine. 



calculation of regulation 155 



definition of load characteristic 141 



definition of regulation 156 



wave-form 7'J 



Ampere-Ohm system 262 



Ampere-turns, the cause of magnetism. See also M.m.f 4 



Ampere-turn, 



unit of m.m.f 5 



vs. Gilbert 266 



Analogue, mechanical, to hysteresis 36 



to .inductance '- 



Annealing of laminations > 



Apparent flux density in teeth . 101 



Armature, eccentric, force upon . 248 



reactance in synchronous machine, nature and definii inn < >f . . . . 140 



See alto Inluet:ince. 



reaction, definition <>f i in 



in a direct current machine 



in an indue -t i< >n machine ... I.I 



in a rotary converter. 175 



>v nehni nous machine. . 139 



Asynchronous. See Iixlm -ti>n machines. 

 Auxiliary poles. See ('<uinmit:itinK poles. 



Axial length of armature. . . 94 



MO 



