Explanation: The MMF produced by uniformly distributed current sheet is identical with the MMF produced by uniformly distributed winding. If the distributed winding in the slots is on the rotor, then the uniformly distributed current sheet would be wrapped around the rotor accordingly. 8. A current sheet with sinusoidal current produces?
A. sinusoidal MMF wave lagging it by 90°
B. sinusoidal MMF wave leading it by 90°
C. trapezoidal MMF wave leading it by 90°
D. trapezoidal MMF wave lagging it by 90°
Answer:A
Explanation: The MMF produced by uniformly distributed current sheet is identical with the MMF produced by uniformly distributed winding. If the distributed winding in the slots is on the rotor, then the uniformly distributed current sheet would be wrapped around the rotor accordingly. 8. A current sheet with sinusoidal current produces?
A. sinusoidal MMF wave lagging it by 90° B. sinusoidal MMF wave leading it by 90° C. trapezoidal MMF wave leading it by 90° D. trapezoidal MMF wave lagging it by 90°
Explanation: A uniform current sheet produces trapezoidal MMF wave and sinusoidal current sheet produces sinusoidal MMF wave leading by 90°. 9. A uniformly distributed winding on the stator has three full pitched coils, each coil having N turns and each turn carrying a current i. The MMF produced by the winding is