Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor ?
A. By changing the number of stater poles
B. Rotor rheostat control
C. By operating two motors in cascade
D. By injecting e.m.f. in the rotor circuit
Answer:A
Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor ?
A. By changing the number of stater poles B. Rotor rheostat control C. By operating two motors in cascade D. By injecting e.m.f. in the rotor circuit