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Where are no equalizer rings connected?

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in DC Machines by (506k points)
Where are no equalizer rings connected?

(a) Only wave winding

(b) Only lap winding

(c) Both wave winding and lap winding

(d) Cannot be determined

I got this question during a job interview.

My question comes from Ways to Reduce Effects of Armature Reaction topic in division Armature Reaction of DC Machines

1 Answer

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Best answer
Correct choice is (a) Only wave winding

Explanation: The armature coils forming each of the two parallel paths are under the influence of all pole-pairs so that the effect of the magnetic circuit asymmetry is equally present in both the parallel paths resulting in equal parallel-path voltages. Thus, equalizer rings are not needed in a wave winding.

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