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Which DC motor has got maximum self-loading property?
  • a)
    Series motor
  • b)
    Shunt motor
  • c)
    Cumulatively compounded motor
  • d)
    Differentially compounded motor
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which DC motor has got maximum self-loading property?a)Series motorb)S...
In a differentially compound DC motor at higher values of load, the flux reduces so sharply at small increase in load. It is advisable that motor should not be used beyond some load value, as it may damage itself by self-loading.
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Which DC motor has got maximum self-loading property?a)Series motorb)S...
Self-loading Property of DC Motors

Self-loading property of a DC motor is the ability of the motor to maintain its speed even when the load on the motor changes. In other words, it is the ability of the motor to self-regulate its speed with respect to the load. The motor that has the maximum self-loading property is the differentially compounded motor.

Explanation

A differentially compounded motor has both series and shunt field windings that are connected in such a way that their effects are opposing each other. The series field winding generates a magnetic field that is proportional to the current flowing through it, while the shunt field winding generates a constant magnetic field.

When the motor is under no-load condition, the series field winding produces a weak magnetic field, while the shunt field winding produces a strong magnetic field. As a result, the motor runs at a high speed.

When the motor is loaded, the series field winding produces a stronger magnetic field, which opposes the shunt field winding. This causes the motor to slow down, but the shunt field winding compensates for this by producing a stronger magnetic field. This results in the motor maintaining its speed even under changing load conditions.

Advantages of Differentially Compounded Motor

The differentially compounded motor has the following advantages:

1. It can maintain its speed under changing load conditions.

2. It has a high starting torque.

3. It has a better speed regulation than other types of DC motors.

4. It is suitable for applications where the load varies widely.

Conclusion

The differentially compounded motor has the maximum self-loading property among all types of DC motors. It is suitable for applications where the load varies widely and requires a motor that can maintain its speed under changing load conditions.
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Which DC motor has got maximum self-loading property?a)Series motorb)Shunt motorc)Cumulatively compounded motord)Differentially compounded motorCorrect answer is option 'D'. Can you explain this answer?
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