Explanation: Te also depends on the sine of the angle between the axis of the two fields(or MMFs) Te =-(P/2)(μoΠrl/g)(FsFr)sinλNm. 2. The torque equation for non salient pole machine is Te =-(P/2)(μoΠrl/g)(FsFr)sinλNm. What does the negative sign in the torque expression indicates?
A. stator and rotor MMF tend to reduce angle λ
B. stator and rotor MMF tend to increase angle λ
C. stator tend to reduce the air gap g
D. rotor tend to reduce the air gap g
Answer:A
Explanation: Te also depends on the sine of the angle between the axis of the two fields(or MMFs) Te =-(P/2)(μoΠrl/g)(FsFr)sinλNm. 2. The torque equation for non salient pole machine is Te =-(P/2)(μoΠrl/g)(FsFr)sinλNm. What does the negative sign in the torque expression indicates?
A. stator and rotor MMF tend to reduce angle λ B. stator and rotor MMF tend to increase angle λ C. stator tend to reduce the air gap g D. rotor tend to reduce the air gap g
Explanation: The torque acts in such a direction as to align the two MMFs Fs and Fr and thereby reduce the angle λ between them. 3. Which of the following statements are correct regarding the torque equation in non salient pole machines, Te =-(P/2)(μoΠrl/g)(FsFr)sinλNm?