Question

What are the advantages of providing the field winding on rotor and armature winding on the stator?

(a) more economical

(b) more efficient

(c) efficient cooling

(d) all of the mentioned

The question was posed to me by my school principal while I was bunking the class.

The above asked question is from Constructional Features of Rotating Electrical Machines-2 topic in section Constructional Features of Rotating Electrical Machines of Electrical Machines

Answer 1

Right answer is (d) all of the mentioned

To explain: If the armature winding is on the stator, only two slip rings are required which implies less losses, more efficiency and more economy. Also, stationary armature winding can be cooled more efficiently.