Does opposing cross flux with interpoles aid in commutation in a dc generator?

In summary, interpoles are a method used to improve commutation by nullifying reactance voltage in conductors. Interpoles also cancel cross flux, which can affect commutation. By supplying more interpoles than armature, the remaining MMF can cancel reactance voltage and improve commutation. Therefore, it can be concluded that interpoles aid in improving commutation by canceling cross flux and reactance voltage.
  • #1
ranju
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Homework Statement


See , in the methods of improving the commtuation , one of the method is using interpoles now what I think that interpoles aids commutation by nullifying the reactance voltage in the conductors.
Though this point is mentioned with the working but it is also mentioned that interpoles cancels the cross flux , I wanted to ask if opposing the cross flux aids in commutation or is it just application of interpoles which has nothing to do with commutation aiding ? I am a bit confused about this as cross flux deteriorate the main flux but does it affect the commutation?

Homework Equations

The Attempt at a Solution


Interpoles ar supplied more than that of armature so that it cancels the cross armature flux and the remaining mmf used in cancelling the reactance voltage so that the mmf at the conductors under brush become zero and hence good commutation occurs
 
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  • #2
.So it can be said that interpoles help in improving the commutation as it cancels cross flux and reactance voltage.
 

Related to Does opposing cross flux with interpoles aid in commutation in a dc generator?

1. What is commutation in a dc generator?

Commutation in a dc generator is the process by which the current flowing through the armature coils is reversed at the moment they pass through the neutral plane. This allows for the production of a unidirectional current output.

2. Why is commutation necessary in a dc generator?

Commutation is necessary in a dc generator to ensure that the current output is in the same direction as the rotation of the armature. This is important for the efficient conversion of mechanical energy into electrical energy.

3. How does commutation occur in a dc generator?

Commutation occurs through the use of a commutator and brushes. The commutator is a rotating cylindrical structure with segments that are connected to the armature coils. The brushes make contact with the commutator segments and as the armature rotates, the brushes reverse the current flow in the armature coils at the neutral plane.

4. What happens if commutation is not working properly in a dc generator?

If commutation is not working properly, the output current may become erratic and the generator may not be able to produce a steady current. This can also result in increased friction and wear on the commutator and brushes, leading to potential damage to the generator.

5. How can commutation be improved in a dc generator?

Commutation can be improved by using high quality materials for the commutator and brushes, ensuring proper alignment and contact between the two, and regularly maintaining and cleaning the commutator and brushes to prevent buildup of debris or wear.

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