Electrical Machines
In a 3 - φ induction motor running at full load which of these parameters is stationary with respect to the stator mmf wave?

  Rotor winding.
  Rotor mmf wave.
  Both rotor and stator winding.
  Stator winding.

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Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

  the damper bars develop synchronous motor torque.
  the damper bars develop induction generator torque.
  the damper bars develop induction motor torque.
  negative sequence currents are generated.

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