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Section IDIRECTCURRENT MACHINES
Armature Peripheral Speed
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ampere-turns per pole amperes per sq armature coils armature copper armature slots armature teeth armature winding armature yoke brush contact calculated coil sides commutating field winding commutating pole commutator bars conductors per slot copper loss core loss current density Design direct-current field coil field resistance field yoke flux density flux distribution curve flux path formula full-load fundamental frequency high-voltage induction motors insulation kilo-lines per sq laminations leakage flux lines per sq load magnetic circuit main poles maximum mean-turn no-load number of conductors number of poles number of slots number of turns ohms pole per phase pole pitch pole shoe power factor ratio reactance voltage resistance rheostat rotor saturation curve section area sheet steel short-circuited shown in Fig shunt field winding silicon steel slots per pole stator surface per watt synchronous machines temperature rise terminal voltage thickness tooth pitch transformer turns per pole voltage induced volts watt loss