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The brushes should be shifted in _______ direction in generator for the satisfactory operation of commutation.

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The brushes should be shifted in _______ direction in generator for the satisfactory operation of commutation.

(a) forward

(b) reverse to rotation

(c) all of the mentioned

(d) none of the mentioned

I got this question in quiz.

This intriguing question originated from Effect of Brush Shift and Compensation Windings topic in chapter DC Machines of Electrical Machines

1 Answer

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Best answer
The correct answer is (a) forward

Best explanation: For the generator, the electromagnetic torque produced is in the opposite direction and so the induced current. So to eliminate the sparking the brushes should be shifted in the forward direction of rotation.

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