urgent

Asked by pritam | 8th Sep, 2010, 11:50: AM

Expert Answer:

A single-loop generator with each terminal connected to a segment of a two-segment metal ring is shown in figure. The two segments of the split metal ring are insulated from each other. This forms a simple COMMUTATOR. The commutator in a dc generator replaces the slip rings of the ac generator. This is the main difference in their construction. The commutator mechanically reverses the armature loop connections to the external circuit. This occurs at the same instant that the polarity of the voltage in the armature loop reverses. Through this process the commutator changes the generated ac voltage to a pulsating dc voltage as shown in the graph. 


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Answered by  | 10th Sep, 2010, 03:54: PM

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