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The armature reaction of an alternator influences
- a)windage losses
- b)operating speed
- c)generated voltage per phase
- d)waveform of voltage generated
Correct answer is option 'C'. Can you explain this answer?
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The armature reaction of an alternator influencesa)windage lossesb)ope...
Armature reaction and its influence on generated voltage per phase
Armature reaction is the phenomenon that occurs in alternators due to the interaction between the magnetic field produced by the armature winding and the main magnetic field produced by the rotor. This interaction affects the distribution of the magnetic flux within the machine, and consequently influences the voltage generated in the stator windings.
The armature reaction induces a demagnetizing effect on the main field, which reduces the effective flux in the machine. This, in turn, reduces the voltage generated in the stator windings. Therefore, the armature reaction has a significant impact on the generated voltage per phase.
The armature reaction can be either magnetizing or demagnetizing, depending on the load current and the power factor of the load. If the load is lagging, the armature reaction is demagnetizing, whereas if the load is leading, the armature reaction is magnetizing.
Compensating for armature reaction
Various methods are used to compensate for the armature reaction in alternators, including:
1. Brush shifting: This involves shifting the brushes to a position where the demagnetizing effect of the armature reaction is minimized.
2. Interpoles: Interpoles are small auxiliary windings that are placed between the main poles. These windings produce a magnetic field that is opposite in direction to the armature reaction, thereby compensating for its demagnetizing effect.
3. Damper windings: Damper windings are also auxiliary windings that are placed in the rotor. They produce a magnetic field that interacts with the armature reaction, thereby reducing its effect on the main field.
Conclusion
In conclusion, the armature reaction has a significant influence on the generated voltage per phase in alternators. It induces a demagnetizing effect on the main field, which reduces the effective flux in the machine and hence the voltage generated in the stator windings. Therefore, compensating for the armature reaction is crucial for maintaining the desired voltage output of the alternator.
Armature reaction is the phenomenon that occurs in alternators due to the interaction between the magnetic field produced by the armature winding and the main magnetic field produced by the rotor. This interaction affects the distribution of the magnetic flux within the machine, and consequently influences the voltage generated in the stator windings.
The armature reaction induces a demagnetizing effect on the main field, which reduces the effective flux in the machine. This, in turn, reduces the voltage generated in the stator windings. Therefore, the armature reaction has a significant impact on the generated voltage per phase.
The armature reaction can be either magnetizing or demagnetizing, depending on the load current and the power factor of the load. If the load is lagging, the armature reaction is demagnetizing, whereas if the load is leading, the armature reaction is magnetizing.
Compensating for armature reaction
Various methods are used to compensate for the armature reaction in alternators, including:
1. Brush shifting: This involves shifting the brushes to a position where the demagnetizing effect of the armature reaction is minimized.
2. Interpoles: Interpoles are small auxiliary windings that are placed between the main poles. These windings produce a magnetic field that is opposite in direction to the armature reaction, thereby compensating for its demagnetizing effect.
3. Damper windings: Damper windings are also auxiliary windings that are placed in the rotor. They produce a magnetic field that interacts with the armature reaction, thereby reducing its effect on the main field.
Conclusion
In conclusion, the armature reaction has a significant influence on the generated voltage per phase in alternators. It induces a demagnetizing effect on the main field, which reduces the effective flux in the machine and hence the voltage generated in the stator windings. Therefore, compensating for the armature reaction is crucial for maintaining the desired voltage output of the alternator.
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The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. Can you explain this answer?
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The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. 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 The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. Can you explain this answer?.
The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. 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 The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The armature reaction of an alternator influencesa)windage lossesb)operating speedc)generated voltage per phased)waveform of voltage generatedCorrect answer is option 'C'. Can you explain this answer?.
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