Question

In compound excitation, which winding/s is/are excited?

(a) Shunt

(b) Series

(c) Both

(d) Cannot be determined

This question was addressed to me by my college director while I was bunking the class.

Question is from Methods of Excitation in portion Commutation Process & Excitation Methods of DC Machines

Answer 1

Correct answer is (c) Both

For explanation I would say: In compound excitation, both series and shunt windings are connected to the armature. For compound excitation both of these windings are excited. Two types are cumulative excitation and differential excitation.