Explanation: The electrical space angle δs between Fs and FR ; and δr between Fr and FR are called load angles. 7. In the design of electromagnetic devices, the maximum value of MMF is limited from the considerations of ____________
A. temperature rise
B. limitation on flux density in teeth
C. torque production rise
D. power rating
Answer:A
Explanation: The electrical space angle δs between Fs and FR ; and δr between Fr and FR are called load angles. 7. In the design of electromagnetic devices, the maximum value of MMF is limited from the considerations of ____________
A. temperature rise B. limitation on flux density in teeth C. torque production rise D. power rating
Explanation: The maximum value of MMF is limited from a consideration of temperature rise. 8. Consider the principle that the torque in a rotating machine is proportional to peak of stator MMF(Fs), rotor MMF(Fr) and the angle between them(δ). Following statements relate to Fs,Fr and δ in different machine: