AC DC MOTOR DRIVES - Practice Mode

1) What is the main use of A.C drive?

High starting torque Group drive motors Control stepless speed in motors Interlocking system in industries

Correct Answer: Control stepless speed in motors

2) What is the function of IGBT in AC drive?

Smoothening incoming A.C supply Controls the power delivered to the motor Stabilize the output voltage from the rectifier Converts incoming A.C power into D.C power output

Correct Answer: Controls the power delivered to the motor

3) Why the A.C drives are better suited for high speed operation?

High starting torque Robust in construction Having lighter gauge winding No brushes and commutation

Correct Answer: No brushes and commutation

4) What is the advantage of AC drive compared to DC drive?

Requires less space Installation and running cost is less Fast response and wide speed range of control Power circuit and control circuits are simple

Correct Answer: Installation and running cost is less

5) Which is the application of single quadrant loads operating in first quadrant in drives?

Hoists Elevators Conveyors Centrifugal pumps

Correct Answer: Centrifugal pumps

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