Which of the following is/are true regarding the significance of the 'barrier' in the rotor of a synchronous reluctance motor?
1. It prevents the rotor from rotating at synchronous speed.
2. It helps to reduce eddy current losses in the rotor.
3. It increases the magnetic flux density in the rotor.
4. It improves the torque characteristics of the motor.
1
Only 2
2
Both 2 and 4
3
Both 1 and 3
4
Only 1 and 4