Explanation: The squirrel cage type is simpler and more economical in construction, requires less maintenance than wound rotor type, since the former doesn’t require slip rings and carbon brushes. 4. 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
Answer:A
Explanation: The squirrel cage type is simpler and more economical in construction, requires less maintenance than wound rotor type, since the former doesn’t require slip rings and carbon brushes. 4. 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
Explanation: 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.