What is phase swinging with reference to synchronous motor?

Phase swinging in synchronous motors refers to the phenomenon where the motor's rotor oscillates or swings back and forth around its synchronous position due to variations in load or system disturbances. This oscillation occurs as the rotor attempts to align with the rotating magnetic field produced by the stator. If the load changes abruptly, the rotor may temporarily lag or lead, causing these swings. Proper control and damping techniques are essential to minimize phase swinging and ensure stable operation.