Electric Drives Practice Test 6

1. Calculate the moment of inertia of the flywheel of mass 45 kg and radius of 2 m.

2. Full form of PWM.

3. What will happen if we increase the air gap in the induction motor?

4. Voltage rating of the IM depends upon the insulation level.

5. The relative speed between the rotor and stator in the induction motor is ______

6. Calculate the resonant frequency if the values of the capacitor and inductor are 4 F and 4 H.

7. The relative speed between the stator magnetic field and rotor in the synchronous generator is ______

8. 1800 second rated motors are used for __________

9. A 3 - phase, 4 pole IM is supplied from a 40 Hz source. Calculate rotor frequency when the rotor runs 100 rpm.

10. Magnetizing current in the induction motor is ______