Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  Consider the following statements1. Interpole... Start Learning for Free
Consider the following statements
1. Interpole windings are connected in series with armature winding
2. Polarity of interpole must be the same as that of the main pole in advance
3. Distortion of the main field under the pole shoes is not affected by the use of interpoles.
Of these statements regarding inter pole used in DC motors, the correct statement(s) is/are
  • a)
    1 and 2
  • b)
    2 and 3
  • c)
    1 and 3
  • d)
    only 1
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements1. Interpole windings are connected i...
Interpole in DC Motors
Interpole windings are an important component in DC motors that help improve the performance and efficiency of the motor. Let's break down the given statements to understand the correct ones.

Statement 1: Interpole windings are connected in series with armature winding
This statement is correct. Interpole windings are connected in series with the armature winding in a DC motor. The purpose of interpoles is to compensate for armature reaction and reduce commutation problems, leading to smoother operation of the motor.

Statement 2: Polarity of interpole must be the same as that of the main pole in advance
This statement is also correct. The polarity of the interpole must be the same as that of the main pole in advance to ensure proper operation of the motor. This alignment helps in strengthening the main field and improving the overall efficiency of the motor.

Statement 3: Distortion of the main field under the pole shoes is not affected by the use of interpoles
This statement is incorrect. The use of interpoles actually helps in reducing the distortion of the main field under the pole shoes. Interpoles provide a more uniform magnetic field distribution, which helps in improving the performance of the motor and reducing losses.

Correct Statement(s)
Therefore, the correct statements regarding interpole used in DC motors are:
- Statement 2: Polarity of interpole must be the same as that of the main pole in advance
- Statement 3: Distortion of the main field under the pole shoes is not affected by the use of interpoles
In conclusion, interpoles play a crucial role in enhancing the performance of DC motors by compensating for armature reaction, improving commutation, and reducing field distortion, ultimately leading to a more efficient motor operation.
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Consider the following statements1. Interpole windings are connected in series with armature winding2. Polarity of interpole must be the same as that of the main pole in advance3. Distortion of the main field under the pole shoes is not affected by the use of interpoles.Of these statements regarding inter pole used in DC motors, the correct statement(s) is/area)1 and 2b)2 and 3c)1 and 3d)only 1Correct answer is option 'B'. Can you explain this answer?
Question Description
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