Rotor Windings
An analysis similar to the stator case is carried out for the rotor,
where the αβ windings affixed to the rotor are shown in Fig. 3-6 with
the α-axis aligned with rotor A-axis. The d-axis (same as the d-axis for
the stator) in this case is at an angle θdA with respect to the A-axis. Following
the procedure for the stator case by replacing θda by θdA results
in the following equations for the rotor winding voltages