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Which of the following methods is used to start a synchronous motor ?
- a)Damper winding
- b)Star-delta starter
- c)Damper winding in conjunction with star-delta starter
- d)Resistance starter in the armature circuit
Correct answer is option 'C'. Can you explain this answer?
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Which of the following methods is used to start a synchronous motor ?a...
Understanding Synchronous Motor Starting Methods
Starting a synchronous motor can be challenging due to its nature of requiring a rotating magnetic field for operation. One effective method combines the use of damper windings and a star-delta starter.
1. Damper Winding
- Purpose: Damper windings are used to provide an initial torque to the motor.
- Functionality: They are designed to create a rotating magnetic field when the motor starts, allowing it to reach synchronous speed.
- Integration: The damper winding helps the motor to pick up speed until it synchronizes with the supply frequency.
2. Star-Delta Starter
- Purpose: This method is employed to reduce the starting current and manage the starting torque.
- Functionality: Initially connects the motor in a star configuration, allowing lower voltage and current during startup. After reaching a certain speed, it switches to a delta configuration for normal operation.
- Benefit: This reduces stress on the motor and power supply during startup.
3. Combination of Both Methods
- Enhanced Performance: By using damper windings alongside a star-delta starter, you achieve a smoother startup.
- Reduced Issues: This combination mitigates the high inrush current and torque problems commonly associated with synchronous motor startups.
- Efficiency: Ensures that the motor can start reliably and reach synchronous speed without excessive electrical or mechanical stress.
Conclusion
In conclusion, option 'C' is correct as the combination of damper windings and a star-delta starter provides an effective solution for starting synchronous motors, ensuring both efficiency and reliability during the startup process.
Starting a synchronous motor can be challenging due to its nature of requiring a rotating magnetic field for operation. One effective method combines the use of damper windings and a star-delta starter.
1. Damper Winding
- Purpose: Damper windings are used to provide an initial torque to the motor.
- Functionality: They are designed to create a rotating magnetic field when the motor starts, allowing it to reach synchronous speed.
- Integration: The damper winding helps the motor to pick up speed until it synchronizes with the supply frequency.
2. Star-Delta Starter
- Purpose: This method is employed to reduce the starting current and manage the starting torque.
- Functionality: Initially connects the motor in a star configuration, allowing lower voltage and current during startup. After reaching a certain speed, it switches to a delta configuration for normal operation.
- Benefit: This reduces stress on the motor and power supply during startup.
3. Combination of Both Methods
- Enhanced Performance: By using damper windings alongside a star-delta starter, you achieve a smoother startup.
- Reduced Issues: This combination mitigates the high inrush current and torque problems commonly associated with synchronous motor startups.
- Efficiency: Ensures that the motor can start reliably and reach synchronous speed without excessive electrical or mechanical stress.
Conclusion
In conclusion, option 'C' is correct as the combination of damper windings and a star-delta starter provides an effective solution for starting synchronous motors, ensuring both efficiency and reliability during the startup process.
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Which of the following methods is used to start a synchronous motor ?a)Damper windingb)Star-delta starterc)Damper winding in conjunction with star-delta starterd)Resistance starter in the armature circuitCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Which of the following methods is used to start a synchronous motor ?a)Damper windingb)Star-delta starterc)Damper winding in conjunction with star-delta starterd)Resistance starter in the armature circuitCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following methods is used to start a synchronous motor ?a)Damper windingb)Star-delta starterc)Damper winding in conjunction with star-delta starterd)Resistance starter in the armature circuitCorrect answer is option 'C'. Can you explain this answer?.
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