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In a synchronous motor, the synchronizing power comes into action when
A) Rotor speed is less than synchronous speed
B) Rotor speed is more than synchronous speed
C) Rotor speed is equal to synchronous speed
D) Rotor speed is either less or more than synchronous speed
Rotor speed is either less or more than synchronous speed
In a synchronous motor, the synchronizing power comes into effect when the rotor speed is either greater or lesser than the synchronous speed, which is crucial for maintaining synchronism with the rotating magnetic field ┬╖ Hence, option D is correct.
In a synchronous motor, the synchronizing power comes into effect when the rotor speed is either greater or lesser than the synchronous speed, which is crucial for maintaining synchronism with the rotating magnetic field ┬╖ Hence, option D is correct.
PsтАЛ=TтЛЕ╧Й тАФ representing the synchronizing power as the product of torque and angular velocity.
S=P120fтАЛ тАФ where S is synchronous speed, f is frequency, and P is number of poles.
The synchronizing power works on the principle that when the rotor speed deviates from the synchronous speed, it creates a torque that either pulls the rotor back to synchronous speed (if it's too slow) or pushes it forward (if it's too fast) ┬╖ This dynamic ensures that the rotor stays synchronized with the stator's magnetic field.
The rotor speed must be adjusted to match the synchronous speed for effective operation.
Synchronous motors operate at constant speed under steady state load conditions.
High efficiency and power factor.
Ability to control speed precisely.
Requires a starting mechanism to reach synchronous speed.
Not suitable for variable speed applications.
Used in applications where precise speed control is required.
Common in industries like textiles, paper, and cement.
Synchronous speed is determined by the frequency of the supply and the number of poles.
Option A is incorrect as synchronizing power only acts when there is a speed difference; option B is also incorrect as it implies loss of synchronization.
D is correct тАФ the synchronizing power acts whenever the rotor speed deviates from the synchronous speed.
Remember that any deviation from synchronous speed leads to synchronizing power action, which relates to torque management in electric machines.