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Why is a single-phase induction motor more noisy than 2-phase or 3-phase induction motors?
- a)Single-phase induction motor doesn’t serves for industrial purposes
- b)Single-phase induction motor receives pulsating power and delivers constant power
- c)2-phase and 3-phase induction motors receives variable instantaneous power
- d)All of the above
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Why is a single-phase induction motor more noisy than 2-phase or 3-ph...
Single-phase induction motor receives pulsating power whereas it delivers constant mechanical power. The instantaneous input electric power is pulsating; becoming positive, negative and zero depending on the load.
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Hence, the correct option is (B)
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Why is a single-phase induction motor more noisy than 2-phase or 3-ph...
Answer:
Single-phase induction motors are generally more noisy compared to two-phase or three-phase induction motors due to the nature of their power supply. Let's understand this in detail:
1. Power Supply:
- Single-phase induction motors are typically used for residential and small commercial applications where the power supply is single-phase.
- In a single-phase power supply, the voltage and current vary sinusoidally with time. This means that the power delivered to the motor is not constant but varies over time.
- On the other hand, two-phase and three-phase induction motors are used in industrial applications where the power supply is two-phase or three-phase.
- In two-phase or three-phase power supplies, the voltage and current waveforms are balanced and have a constant amplitude, resulting in a more constant power delivery.
2. Power Delivery:
- Single-phase induction motors receive pulsating power from the single-phase power supply. This means that the power delivered to the motor is not constant but fluctuates over time.
- Due to this fluctuating power delivery, the torque produced by the motor also fluctuates. These torque variations result in vibrations and noise.
- In contrast, two-phase and three-phase induction motors receive a more constant power supply, which leads to a more constant torque production and smoother operation. This results in reduced vibrations and noise.
3. Industrial Applications:
- Single-phase induction motors are generally not used for industrial purposes due to their limitations in power delivery and performance.
- Two-phase and three-phase induction motors are preferred for industrial applications due to their ability to deliver constant power and provide higher efficiency and performance.
Therefore, the correct answer is option 'B': Single-phase induction motors receive pulsating power and deliver constant power. This pulsating power supply results in torque variations, vibrations, and noise, making single-phase induction motors more noisy compared to two-phase or three-phase induction motors.
Single-phase induction motors are generally more noisy compared to two-phase or three-phase induction motors due to the nature of their power supply. Let's understand this in detail:
1. Power Supply:
- Single-phase induction motors are typically used for residential and small commercial applications where the power supply is single-phase.
- In a single-phase power supply, the voltage and current vary sinusoidally with time. This means that the power delivered to the motor is not constant but varies over time.
- On the other hand, two-phase and three-phase induction motors are used in industrial applications where the power supply is two-phase or three-phase.
- In two-phase or three-phase power supplies, the voltage and current waveforms are balanced and have a constant amplitude, resulting in a more constant power delivery.
2. Power Delivery:
- Single-phase induction motors receive pulsating power from the single-phase power supply. This means that the power delivered to the motor is not constant but fluctuates over time.
- Due to this fluctuating power delivery, the torque produced by the motor also fluctuates. These torque variations result in vibrations and noise.
- In contrast, two-phase and three-phase induction motors receive a more constant power supply, which leads to a more constant torque production and smoother operation. This results in reduced vibrations and noise.
3. Industrial Applications:
- Single-phase induction motors are generally not used for industrial purposes due to their limitations in power delivery and performance.
- Two-phase and three-phase induction motors are preferred for industrial applications due to their ability to deliver constant power and provide higher efficiency and performance.
Therefore, the correct answer is option 'B': Single-phase induction motors receive pulsating power and deliver constant power. This pulsating power supply results in torque variations, vibrations, and noise, making single-phase induction motors more noisy compared to two-phase or three-phase induction motors.
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Why is a single-phase induction motor more noisy than 2-phase or 3-phase induction motors?a)Single-phase induction motor doesn’t serves for industrial purposesb)Single-phase induction motor receives pulsating power and delivers constant powerc)2-phase and 3-phase induction motors receives variable instantaneous powerd)All of the aboveCorrect answer is option 'B'. Can you explain this answer?
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Why is a single-phase induction motor more noisy than 2-phase or 3-phase induction motors?a)Single-phase induction motor doesn’t serves for industrial purposesb)Single-phase induction motor receives pulsating power and delivers constant powerc)2-phase and 3-phase induction motors receives variable instantaneous powerd)All of the aboveCorrect answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Why is a single-phase induction motor more noisy than 2-phase or 3-phase induction motors?a)Single-phase induction motor doesn’t serves for industrial purposesb)Single-phase induction motor receives pulsating power and delivers constant powerc)2-phase and 3-phase induction motors receives variable instantaneous powerd)All of the aboveCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Why is a single-phase induction motor more noisy than 2-phase or 3-phase induction motors?a)Single-phase induction motor doesn’t serves for industrial purposesb)Single-phase induction motor receives pulsating power and delivers constant powerc)2-phase and 3-phase induction motors receives variable instantaneous powerd)All of the aboveCorrect answer is option 'B'. Can you explain this answer?.
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