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To implement armature voltage control, it must be ensured that
- a)it is used on separately excited machine
- b)it is used on shunt machine
- c)it is used on series machine
- d)any of the mentioned machine
Correct answer is option 'A'. Can you explain this answer?
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To implement armature voltage control, it must be ensured thata)it is ...
It must be separately excited mahcine to implement the armature voltage control.
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Understanding Armature Voltage Control
Armature voltage control is a method used to regulate the speed of a DC motor by varying the voltage applied to the armature winding. This technique is particularly effective in separately excited DC machines. Here’s why:
1. Separately Excited Machines
- Independent Control: In separately excited machines, the field winding is powered by an independent source. This allows for precise control over the field current, which is crucial when varying armature voltage to adjust speed.
- Speed Regulation: By adjusting the armature voltage, the speed of the motor can be effectively controlled without altering the field strength, ensuring stable operation and better performance.
2. Shunt and Series Machines
- Shunt Machines: Although armature voltage control can be applied to shunt machines, the effect is limited. The field current varies with armature current, complicating the control process.
- Series Machines: In series machines, the field current is highly dependent on the armature current, making armature voltage control impractical. A change in armature voltage would significantly affect the field strength, leading to unstable operation.
Conclusion
- Best Application: Therefore, armature voltage control is most effectively implemented on separately excited machines due to their independent field control, allowing for smoother and more reliable speed regulation.
In summary, while other types of machines may have limited applicability with this control method, separately excited machines stand out as the optimal choice.
Armature voltage control is a method used to regulate the speed of a DC motor by varying the voltage applied to the armature winding. This technique is particularly effective in separately excited DC machines. Here’s why:
1. Separately Excited Machines
- Independent Control: In separately excited machines, the field winding is powered by an independent source. This allows for precise control over the field current, which is crucial when varying armature voltage to adjust speed.
- Speed Regulation: By adjusting the armature voltage, the speed of the motor can be effectively controlled without altering the field strength, ensuring stable operation and better performance.
2. Shunt and Series Machines
- Shunt Machines: Although armature voltage control can be applied to shunt machines, the effect is limited. The field current varies with armature current, complicating the control process.
- Series Machines: In series machines, the field current is highly dependent on the armature current, making armature voltage control impractical. A change in armature voltage would significantly affect the field strength, leading to unstable operation.
Conclusion
- Best Application: Therefore, armature voltage control is most effectively implemented on separately excited machines due to their independent field control, allowing for smoother and more reliable speed regulation.
In summary, while other types of machines may have limited applicability with this control method, separately excited machines stand out as the optimal choice.
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To implement armature voltage control, it must be ensured thata)it is used on separately excited machineb)it is used on shunt machinec)it is used on series machined)any of the mentioned machineCorrect answer is option 'A'. Can you explain this answer?
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