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The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of
- a)zero degree
- b)two degrees
- c)five degrees
- d)ten degrees
Correct answer is option 'C'. Can you explain this answer?
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The mechanical displacement of the rotor with respect to the stator, i...
- In polyphase multipolar synchronous motors running at full load, the mechanical displacement of the rotor with respect to the stator is typically around five degrees. This displacement is known as the rotor angle or the torque angle.
- The rotor angle represents the phase difference between the rotor and stator magnetic fields in synchronous motors. It is determined by the electrical and mechanical characteristics of the motor and the load it is driving. The rotor angle affects the torque production and power factor of the motor.
- While the exact value of the rotor angle can vary depending on the specific motor design and operating conditions, a typical value of approximately five degrees is commonly encountered in polyphase multipolar synchronous motors running at full load.
- Option A ("zero degree") is incorrect because synchronous motors require a phase difference between the rotor and stator magnetic fields for torque production, and a zero-degree displacement would result in no torque.
- Option B ("two degrees") is not the most common value and is not generally representative of the rotor displacement in polyphase multipolar synchronous motors.
- Option D ("ten degrees") is also not the most common value and is generally higher than the typical rotor displacement observed in polyphase multipolar synchronous motors.
- Therefore, the correct answer is C: five degrees, which represents the approximate mechanical displacement of the rotor with respect to the stator in polyphase multipolar synchronous motors running at full load.
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The mechanical displacement of the rotor with respect to the stator, i...
Introduction:
In polyphase multipolar synchronous motors, the mechanical displacement of the rotor with respect to the stator refers to the angular difference between the rotor and stator magnetic fields. This displacement is necessary for the motor to start and produce torque.
Explanation:
The mechanical displacement of the rotor with respect to the stator in polyphase multipolar synchronous motors running at full load is typically around 5 degrees. This is due to the design and operation of synchronous motors.
Reasons for Mechanical Displacement:
There are a few reasons for the mechanical displacement of the rotor with respect to the stator in synchronous motors:
1. Magnetic Field Interaction: The rotor of a synchronous motor has a magnetic field induced by the excitation current flowing through the rotor winding. This magnetic field interacts with the stator magnetic field to produce torque. The mechanical displacement ensures that the rotor and stator magnetic fields are properly aligned to generate torque.
2. Synchronous Speed: Synchronous motors operate at a fixed synchronous speed determined by the frequency of the power supply and the number of poles in the motor. The mechanical displacement ensures that the rotor is positioned in such a way that it rotates at the synchronous speed.
3. Torque Production: The mechanical displacement is necessary for the production of torque in synchronous motors. If there is no displacement, the rotor and stator magnetic fields would be perfectly aligned, resulting in no torque production.
Impact of Full Load:
At full load, the mechanical displacement is of the order of 5 degrees. This means that the rotor is positioned 5 degrees behind the stator magnetic field. This displacement allows the motor to produce the required torque to overcome the load.
Other Considerations:
It is important to note that the mechanical displacement can vary depending on the design and operating conditions of the motor. Factors such as motor size, pole number, and load conditions can influence the actual mechanical displacement.
In conclusion, the mechanical displacement of the rotor with respect to the stator in polyphase multipolar synchronous motors running at full load is typically around 5 degrees. This displacement is necessary for the motor to start and produce torque.
In polyphase multipolar synchronous motors, the mechanical displacement of the rotor with respect to the stator refers to the angular difference between the rotor and stator magnetic fields. This displacement is necessary for the motor to start and produce torque.
Explanation:
The mechanical displacement of the rotor with respect to the stator in polyphase multipolar synchronous motors running at full load is typically around 5 degrees. This is due to the design and operation of synchronous motors.
Reasons for Mechanical Displacement:
There are a few reasons for the mechanical displacement of the rotor with respect to the stator in synchronous motors:
1. Magnetic Field Interaction: The rotor of a synchronous motor has a magnetic field induced by the excitation current flowing through the rotor winding. This magnetic field interacts with the stator magnetic field to produce torque. The mechanical displacement ensures that the rotor and stator magnetic fields are properly aligned to generate torque.
2. Synchronous Speed: Synchronous motors operate at a fixed synchronous speed determined by the frequency of the power supply and the number of poles in the motor. The mechanical displacement ensures that the rotor is positioned in such a way that it rotates at the synchronous speed.
3. Torque Production: The mechanical displacement is necessary for the production of torque in synchronous motors. If there is no displacement, the rotor and stator magnetic fields would be perfectly aligned, resulting in no torque production.
Impact of Full Load:
At full load, the mechanical displacement is of the order of 5 degrees. This means that the rotor is positioned 5 degrees behind the stator magnetic field. This displacement allows the motor to produce the required torque to overcome the load.
Other Considerations:
It is important to note that the mechanical displacement can vary depending on the design and operating conditions of the motor. Factors such as motor size, pole number, and load conditions can influence the actual mechanical displacement.
In conclusion, the mechanical displacement of the rotor with respect to the stator in polyphase multipolar synchronous motors running at full load is typically around 5 degrees. This displacement is necessary for the motor to start and produce torque.
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The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order ofa)zero degreeb)two degreesc)five degreesd)ten degreesCorrect answer is option 'C'. Can you explain this answer?
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