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Which of the following is dynamic braking?

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in DC Machines by (506k points)
Which of the following is dynamic braking?

(a) Reversal of field connections

(b) Reversal of armature connections

(c) Addition of equal and opposite field

(d) Removal of armature circuit from current machine circuit

This question was addressed to me during an online interview.

The question is from Braking of DC Motors in division DC Motors of DC Machines

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Best answer
Right choice is (d) Removal of armature circuit from current machine circuit

Easiest explanation: Reversal of the connections of armature is the method called plugging. In dynamic braking we remove the armature circuit and connect it to different resistor, with field circuit still connected to the external supply.

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