The direction of rotation of the synchronous motor can be reversed by reversing

The direction of rotation of the synchronous motor can be reversed by reversing

Right Answer is:

Supply phase sequence

SOLUTION

Reversing a Synchronous Motor

  • The direction of rotation of a synchronous motor is determined by its starting direction, as initiated by induction-motor action.
  • Thus, to reverse the direction of a three-phase synchronous motor, it is necessary to first stop the motor and then reverse the phase sequence of the three-phase connections at the stator like an induction motor.
  • The direction of rotation of a 3-phase synchronous motor can be changed by altering the phase sequence of the supply. I.e from RBY to RYB. Doing so will change the direction of rotation from clockwise to anticlockwise.
  • Can Boats Go In Reverse?
  • Reversing the current to the field windings will not affect the direction of rotation. If the current in the field winding is reversed the motor will run in the same direction. The field side will only slip through a pole-pitch due to the reversal of the polarities of the field poles.

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