Question

Each of the following is valid for interpoles except __________

(a) they are connected in parallel with the armature so that they carry part of armature current

(b) they are small yoke fixed poles spaced in between main poles

(c) their polarity, in case of generator is same as that of main poles ahead

(d) they automatically neutralize not only reactance voltage but cross-magnetization also

I have been asked this question during an online interview.

This question is from Effect of Brush Shift and Compensation Windings in chapter DC Machines of Electrical Machines

Answer 1

Right answer is (a) they are connected in parallel with the armature so that they carry part of armature current

To explain: All the options are valid for the interpoles except a because they are connected in series not in parallel.