Electric Drives Practice Test 4

1. The rotor injection method is a part of the slip changing technique.

2. During short circuit condition, the voltage is equal to ________

3. Calculate the value of the time period if the frequency of the signal is .48 sec.

4. Regenerative is the best electrical braking among all braking techniques.

5. Calculate the value of the resistance of a wire of length = 12 m, area = 2 m² and Ρ = 6 Ω-m.

6. 1 calorie is equal to ________

7. Calculate the value of the short circuit ratio if the per unit value of synchronous reactance is 1 Ω. Assume armature resistance is 0 ohm.

8. Calculate the reactive power in a 29.6 Ω resistor.

9. Choose the correct in the case of V/F control.

10. Calculate the total heat dissipated in a rotor resistor of 21 Ω when .81 A current flows through it.