engineering recuitment NCL Assistant Foreman (Trainee) Mock Test 2024 Electrical Machines Three Phase Induction Motor Induction Motor Speed Control
Which of the following statement is correct regarding speed control methods of three phase induction motor
1
During the stator voltage control method of speed control of the induction motor, the motor acts as a constant torque variable power drive.
2
By using stator voltage control method, speeds above the rated value can be achieved.
3
By using rotor resistance control method, speeds above the rated value can be achieved.
4
During the rotor resistance method of speed control of the induction motor, the motor acts as a constant power variable torque drive.