A winding of 20 full pitched series turns, distributed over a band of 60° under each pole, carries a current of 3A. The winding produces a uniform current sheet of density (in AT’s per electrical radiangs) of
A. 180/Π
B. 120/Π
C. 90/Π
D. 60/Π
Answer:A
A winding of 20 full pitched series turns, distributed over a band of 60° under each pole, carries a current of 3A. The winding produces a uniform current sheet of density (in AT’s per electrical radiangs) of
A. 180/Π B. 120/Π C. 90/Π D. 60/Π
Explanation: Uniform current density J=(20∗3)/(Π/3)=180/Π. 12. A sinusoidal current sheet in a rotating electrical machine has peak value along q-axis. The peak value of sinusoidal MMF would be