Theory of Alternating-current Machinery

actual alternating angle armature assumed axis becomes brushes cent characteristic circle circuit coil commutating component connected considered constant converter core corresponding curve designed determined developed diagram difference direction distribution drop effect electrical equal equation equivalent excitation expressed fact field flux follows frequency fundamental given harmonic hence impedance impressed increase indicated induction induction motor lagging leading leakage limits load loss machine magnetic magnitude manner maximum means method motor operation opposite phase phasor pitch pole positive possible power factor primary produce rated ratio reactance reduced reference regulation relations represented resistance respect resultant rotating rotor secondary short-circuit shown in Fig shows side slip slots space speed starting stator supply synchronous terminal three-phase tion torque transformer turns voltage volts wave winding zero