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Electrical Machines
In DC machines, the interpoles are provided
to make commutation spark less.
to counteract demagnetizing effect of armature mmf in commutating zone.
to counteract the reactance voltage and the cross-magnetizi
both (B) and (C).
to make commutation spark less.
to counteract demagnetizing effect of armature mmf in commutating zone.
to counteract the reactance voltage and the cross-magnetizi
both (B) and (C).
Answer
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Related Question
Electrical Machines
Which of the following load normally needs starting torque more than rated torque?
Air compressors.
Conveyers.
Centrifugal pumps.
Blowers.
Air compressors.
Conveyers.
Centrifugal pumps.
Blowers.
Answer
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Electrical Machines
If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as
crawling.
cogging.
air gap.
relative speed.
crawling.
cogging.
air gap.
relative speed.
Answer
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Electrical Machines
In DC generator, lap winding is used in
high voltage and low current applications.
where constant speed is required.
high current and low voltage applications.
where greater load is connected.
high voltage and low current applications.
where constant speed is required.
high current and low voltage applications.
where greater load is connected.
Answer
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Electrical Machines
What is the emf generated by a 4 pole Lap connected DC Motor rotating at 1500 rpm having 1000 conductors and useful flux per pole is 0.4 mWb.
20 volts.
40 volts.
10 volts.
30 volts.
20 volts.
40 volts.
10 volts.
30 volts.
Answer
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Electrical Machines
In a 12 pole triplex lap wound DC armature, each conductor can carry current of 100 A. The rated current of this armature is
1200 A.
3600 A.
600 A.
2400 A.
1200 A.
3600 A.
600 A.
2400 A.
Answer
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