Polarity of interpoles is one pole ahead in the direction of armature rotation in _____________(a) Motor(b) Generator(c) Always ahead(d) Always behindI had been asked this question in an online interview.This interesting question is from Commutation Process -1 in division Commutation Process & Excitation Methods of DC Machines

Polarity of interpoles is one pole ahead in the direction of armature

1.	Polarity of interpoles is one pole ahead in the direction of armature rotation in _____________(a) Motor(b) Generator(c) Always ahead(d) Always behindI had been asked this question in an online interview.This interesting question is from Commutation Process -1 in division Commutation Process & Excitation Methods of DC Machines
Answer» The correct answer is (b) Generator To elaborate: POLARITY of an interpole is that of the main pole ahead in the DIRECTION of armature ROTATION for the generating mode and that of the main pole left BEHIND with RESPECT to the direction of rotation for motoring mode.

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