The injected e.m.f. in the rotor of induction motor must have
A. zero frequency
B. the same frequency as the slip frequency
C. the same phase as the rotor e.m.f.
D. high value for the satisfactory speed control
Answer:B
The injected e.m.f. in the rotor of induction motor must have
A. zero frequency B. the same frequency as the slip frequency C. the same phase as the rotor e.m.f. D. high value for the satisfactory speed control