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Some Basic Considerations
Transformer Construction and Operation
Transformer Regulation and Efficiency
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actual admittance alternator ampere applied voltage armature reaction armature resistance autotransformer axis back e.m.f. cent coil complexor diagram computed connected constant copper loss core loss corresponding curve delta difference displacement angle efficiency electrical equal exciting current field winding flux density friction and windage gross power output incoming machine induced e.m.f. induction motor inductor leakage impedance leakage inductance leakage reactance line current line voltage line-to-neutral magnetic magnitude maximum motor of Prob neutral no-load number of poles ohms per phase open-circuit operation parameters per-unit values power factor primary current rated value rated voltage reactance drop reactive power repulsion motor revolving field rheostat rotating rotor circuit rotor resistance rotor windings salient-pole secondary current sequence short-circuit shown in Fig shows single-phase sinusoidal slip rings slots Solution starting torque stator synchronous machine synchronous motor synchronous reactance synchronous speed terminal voltage three-phase torque transformer turns ratio volt-ampere voltage equation volts zero