Question 178Electricity & Electronics - Assistant Engineer

70% to pass

What statement is true concerning the use of commutating poles (also known as interpoles) in DC generators?

AThese large poles are placed in the magnetic neutral plane between the main field poles and are designed to eliminate or reduce sparking caused by inductance of the field coils.

BThese windings are wound on the main field poles and are designed to eliminate or reduce sparking caused by inductance of the field coils.

CThese windings are wound on the main field poles and are designed to eliminate or reduce sparking caused by inductance of the armature coils.

DThese narrow poles are placed in the magnetic neutral plane between the main field poles and are designed to eliminate or reduce sparking caused by inductance of the armature coils.

AI Explanation

The correct answer is D. Commutating poles, or interpoles, are narrow poles placed in the magnetic neutral plane between the main field poles of a DC generator. These interpoles are designed to eliminate or reduce sparking caused by the inductance of the armature coils as they pass through the magnetic neutral plane. The other options are incorrect because: - Option A incorrectly states that the interpoles are large poles, when they are actually narrow poles. - Options B and C incorrectly state that the interpoles are designed to reduce sparking caused by the inductance of the field coils, rather than the armature coils.

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