Effects of armature reaction in dc machines pdf
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Armature reaction in DC motor pdf

What is armature reaction and commutationArmature reaction types

How to reduce armature reaction

How does armature reaction affect the output voltage in a separately excited DC generator

Commutation in DC machine PDF

Armature flux

Armature reaction in DC generator

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By armature reaction is meant the effect of magnetic field set up by armature current on the distribution of flux under main poles of a generator.
filexlib. The armature magnetic field has two effects: (i) It demagnetises or weakens the main flux and (ii) It cross-magnetises or distorts it.
Armature reaction is one of the reasons that causes generated emf in DC Generator to decrease.
What are the effects of armature reaction and how can they reduced? The effect of armature reaction can be reduced by placing a set of interpoles or commutating poles between the main poles of the DC generator . The polarity of interpole must be that of the main pole just next of it in the direction of rotation.
What is armature reaction in DC machine PDF? Armature Reaction: The effect of magnetic field set up by armature current on the distribution of flux under main poles of a generator . The armature magnetic field has two effects: (i) It demagnetises or weakens the main flux and (ii) It cross-magnetises or distorts it.
Electric Machinery. Armature Reaction of the DC machine. (Generator/Motor) Effect of Armature Reaction. • Armature magnetic field has two effects:. This paper gives the brief introduction about armature reaction. The problems such as high circulating current, poor commutation and sparking may occur at
What are the effects of armature reaction in a dc machine? Armature reaction weakens the main flux . In case of a dc generator, weakening of the main flux reduces the generated voltage. Armature reaction distorts the main flux, hence the position of M.N.A. gets shifted (M.N.A. is perpendicular to the flux lines of main field flux).
The adverse effects of armature reaction: Armature reaction weakens the main flux. In case of a dc generator, weakening of the main flux reduces the generated
Armature Reaction. Introduction. 4-1. In a d.c. generator, the purpose of field winding is to produce magnetic field (called main flux)
The cross-magnetizing effect of armature reaction may cause trouble in d.c. machines subjected to large fluctuations in load. In order to neutralize the cross
Which of the are effects of armature reaction? Armature reaction has two undesirable effects: First, it distorts the main field . Secondly, it reduces the main field flux or both. When the main field is distorted, then there will be a cross magnetizing effect.
Which of the are effects of armature reaction? Armature reaction has two undesirable effects: First, it distorts the main field . Secondly, it reduces the main field flux or both. When the main field is distorted, then there will be a cross magnetizing effect.
The phenomenon of armature reaction in a d.c. generator is shown in Fig. Let us discuss these effects of armature reaction by considering a 2-pole.

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