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Armature voltage controlled method of speed control is a
  • a)
    constant power method
  • b)
    variable power method
  • c)
    constant torque method
  • d)
    variable torque method
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Armature voltage controlled method of speed control is aa)constant pow...
Understanding Armature Voltage Control Method
The armature voltage control method is widely used in DC motors for speed regulation. This method primarily focuses on varying the voltage supplied to the armature, which directly influences the motor's speed.
Constant Torque Method
- The correct answer is option 'C' - Constant Torque Method.
- In this method, the motor operates under a constant torque condition, which means that the torque produced remains stable regardless of speed changes.
- When the armature voltage is adjusted, it affects the speed while maintaining the torque at a constant level.
Key Features of Constant Torque Method
- Speed Control: By varying the armature voltage, the speed of the motor can be controlled efficiently within a certain range.
- Torque Consistency: The motor can deliver a constant output torque, making it suitable for applications requiring uniform performance, such as conveyors or fans.
- Efficiency: This method ensures that the motor utilizes power effectively, minimizing energy losses during operation.
Applications
- The constant torque method is ideal in scenarios like:
- Lifting mechanisms (e.g., cranes)
- Rolling mills
- Applications requiring consistent performance under varying loads.
Conclusion
In summary, the armature voltage controlled method of speed control is categorized as a constant torque method because it maintains the torque while allowing speed variations. This makes it a reliable and efficient choice for many industrial applications where torque consistency is crucial.
Free Test
Community Answer
Armature voltage controlled method of speed control is aa)constant pow...
Armature voltage controlled method of speed control is a constant torque method. The armature torque of DC motor is given by
For constant field flux,
The armature current is given by
When armature voltage increases, the speed of motor and back emf also increase. Therefore, from equation (3), the armature torque remains constant.
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Armature voltage controlled method of speed control is aa)constant power methodb)variable power methodc)constant torque methodd)variable torque methodCorrect answer is option 'C'. Can you explain this answer?
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