Explanation: The power input to the DC field winding is dissipated as i2R loss in the field winding (once the required field current is established). 8. What is the reason behind armature structure for both DC and AC machines being laminated?
A. reduce i2R losses
B. reduce the leakage flux
C. reduce the eddy current losses
D. for better operating power factor
Answer:A
Explanation: The power input to the DC field winding is dissipated as i2R loss in the field winding (once the required field current is established). 8. What is the reason behind armature structure for both DC and AC machines being laminated?
A. reduce i2R losses B. reduce the leakage flux C. reduce the eddy current losses D. for better operating power factor
Explanation: The armature windings of both the DC and AC machines have to deal with alternating current only; this is the reason why the armature structure of all rotating machines are laminated in order to reduce the eddy current losses. 9. Armature winding is one in which working ___________