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In a DC machine brushes are normally located along GNA.

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In a DC machine brushes are normally located along GNA.

(a) True

(b) False

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This interesting question is from Armature Reaction -1 in division Armature Reaction of DC Machines

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Correct answer is (a) True

The best I can explain: Brushes are generally located at 900 to direct axis. The axis 900 to the direct axis is called as quadrature axis (q-axis). Generally, q-axis is along the geometric neutral axis (GNA) of machine. The brushes in a DC machine are normally located along the q-axis.

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