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A salient pole synchronous motor is running with normal excitation it the excitation is reduced to zero than?
- a)It becomes an induction motor
- b)Remains synchronous motor
- c)It becomes are reluctance motor
- d)Stop
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
A salient pole synchronous motor is running with normal excitation it ...
because torque developed T = TRl Telect
If extn zero electromagnetic zero by reluctance torque present incase of salient pole so it becomes reluctance motor.
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A salient pole synchronous motor is running with normal excitation it ...
Explanation:
When the excitation of a salient pole synchronous motor is reduced to zero, the following happens:
1. Loss of magnetic field:
The excitation is responsible for creating a magnetic field in the rotor. When the excitation is reduced to zero, the magnetic field is lost, and the rotor loses its ability to synchronize with the stator.
2. No torque production:
The synchronous motor relies on the interaction of the stator and rotor magnetic fields to produce torque. Without excitation, the rotor magnetic field collapses, and no torque is produced.
3. No self-starting ability:
A synchronous motor requires an external means to start, such as a prime mover, which provides the initial torque to bring the rotor to synchronous speed. Without excitation, the rotor cannot start on its own.
4. Becomes a passive load:
When the excitation is reduced to zero, the synchronous motor becomes a passive load, consuming a small amount of current, but not producing any useful work.
5. Eventually stops:
If the excitation is reduced to zero while the motor is running, it will eventually come to a stop due to the absence of torque production.
Therefore, the correct option is D, which states that the motor will stop if the excitation is reduced to zero.
When the excitation of a salient pole synchronous motor is reduced to zero, the following happens:
1. Loss of magnetic field:
The excitation is responsible for creating a magnetic field in the rotor. When the excitation is reduced to zero, the magnetic field is lost, and the rotor loses its ability to synchronize with the stator.
2. No torque production:
The synchronous motor relies on the interaction of the stator and rotor magnetic fields to produce torque. Without excitation, the rotor magnetic field collapses, and no torque is produced.
3. No self-starting ability:
A synchronous motor requires an external means to start, such as a prime mover, which provides the initial torque to bring the rotor to synchronous speed. Without excitation, the rotor cannot start on its own.
4. Becomes a passive load:
When the excitation is reduced to zero, the synchronous motor becomes a passive load, consuming a small amount of current, but not producing any useful work.
5. Eventually stops:
If the excitation is reduced to zero while the motor is running, it will eventually come to a stop due to the absence of torque production.
Therefore, the correct option is D, which states that the motor will stop if the excitation is reduced to zero.
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A salient pole synchronous motor is running with normal excitation it ...
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A salient pole synchronous motor is running with normal excitation it the excitation is reduced to zero than?a)It becomes an induction motorb)Remains synchronous motorc)It becomes are reluctance motord)StopCorrect answer is option 'D'. Can you explain this answer?
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