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Fifth harmonic component of the induced voltage in three-phase AC generator can be eliminated by using a winding pitch to:
- a)2/3
- b)4/5
- c)5/6
- d)6/7
Correct answer is option 'B'. Can you explain this answer?
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Fifth harmonic component of the induced voltage in three-phase AC gen...
Pitch factor is given by,
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KC = cos(nα/2)
Where α is the short pitch angle
nth harmonic component of the induced voltage is eliminated at winding pitch n-1/n
5th harmonic component of the induced voltage is eliminated at winding pitch 5-1/5 = 4/5
Hence, the correct option is (B)
Most Upvoted Answer
Fifth harmonic component of the induced voltage in three-phase AC gen...
Explanation:
The winding pitch of a three-phase AC generator refers to the arrangement of the coils in the stator slots. It determines the phase relationship between the induced voltages in the three phases. By selecting an appropriate winding pitch, the harmonics in the induced voltage can be minimized or eliminated.
The fifth harmonic component:
The fifth harmonic component refers to the voltage or current waveform that has a frequency five times higher than the fundamental frequency. In a three-phase AC generator, the fundamental frequency is typically 50 or 60 Hz, depending on the region.
Eliminating the fifth harmonic component:
To eliminate the fifth harmonic component in the induced voltage, a winding pitch of 4/5 is used. This means that the coils in the stator slots are arranged such that the voltage induced in each phase is shifted by 4/5 of a pole pitch.
When the winding pitch is 4/5, the induced voltage in each phase will have a phase difference of 120 degrees multiplied by 4/5, which is 96 degrees. This phase difference effectively cancels out the fifth harmonic component in the voltage waveform.
Effect of winding pitch on other harmonics:
While the winding pitch of 4/5 helps in eliminating the fifth harmonic component, it may also affect the other harmonics in the induced voltage. The winding pitch determines the phase relationship between the voltages induced in the three phases.
By selecting a specific winding pitch, it is possible to minimize or eliminate certain harmonics while allowing others to exist. In the case of eliminating the fifth harmonic component, the winding pitch of 4/5 is the most suitable choice.
Conclusion:
In summary, the winding pitch of a three-phase AC generator can be adjusted to eliminate specific harmonics in the induced voltage. The fifth harmonic component can be eliminated by using a winding pitch of 4/5, which ensures a phase difference of 96 degrees between the induced voltages in the three phases. This eliminates the fifth harmonic component, resulting in a cleaner and more sinusoidal voltage waveform.
The winding pitch of a three-phase AC generator refers to the arrangement of the coils in the stator slots. It determines the phase relationship between the induced voltages in the three phases. By selecting an appropriate winding pitch, the harmonics in the induced voltage can be minimized or eliminated.
The fifth harmonic component:
The fifth harmonic component refers to the voltage or current waveform that has a frequency five times higher than the fundamental frequency. In a three-phase AC generator, the fundamental frequency is typically 50 or 60 Hz, depending on the region.
Eliminating the fifth harmonic component:
To eliminate the fifth harmonic component in the induced voltage, a winding pitch of 4/5 is used. This means that the coils in the stator slots are arranged such that the voltage induced in each phase is shifted by 4/5 of a pole pitch.
When the winding pitch is 4/5, the induced voltage in each phase will have a phase difference of 120 degrees multiplied by 4/5, which is 96 degrees. This phase difference effectively cancels out the fifth harmonic component in the voltage waveform.
Effect of winding pitch on other harmonics:
While the winding pitch of 4/5 helps in eliminating the fifth harmonic component, it may also affect the other harmonics in the induced voltage. The winding pitch determines the phase relationship between the voltages induced in the three phases.
By selecting a specific winding pitch, it is possible to minimize or eliminate certain harmonics while allowing others to exist. In the case of eliminating the fifth harmonic component, the winding pitch of 4/5 is the most suitable choice.
Conclusion:
In summary, the winding pitch of a three-phase AC generator can be adjusted to eliminate specific harmonics in the induced voltage. The fifth harmonic component can be eliminated by using a winding pitch of 4/5, which ensures a phase difference of 96 degrees between the induced voltages in the three phases. This eliminates the fifth harmonic component, resulting in a cleaner and more sinusoidal voltage waveform.
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Fifth harmonic component of the induced voltage in three-phase AC generator can be eliminated by using a winding pitch to:a)2/3b)4/5c)5/6d)6/7Correct answer is option 'B'. Can you explain this answer?
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