Reversal of direction of Rotation:

· As we already know that the direction of rotation of the rotor is same as that of the rotating magnetic field.

· Hence in order to change the direction of the rotor we need to change direction of rotating magnetic field by interchanging the two of the phases to the reverse direction of rotation.

· Lets have a look at the circuitry for reversal of the direction of rotation:

· When the reversal switch is in the forward direction the phase sequence R,Y,B will be normal

· But when the switch is in reverse direction then the phase R and Y will be interchanged making the phase chain as Y, R & B.

· This will reverse the rotating magnetic field and which will reverse the direction of the motor.