AC DC MOTOR DRIVES - Quiz

1) What is the function of Field Supply Unit (FSU) in DC drive?

Produces required firing current to the firing circuit Provides variable voltage to the field winding of motor Provides a constant voltage to the field winding of motor Provides a constant voltage to the armature of the motor

2) What is the disadvantage of DC drive?

Not suitable for high speed operation More complex with a single power conversion More expensive than AC drive for high capacity motor Installation of DC drives is more complicated

3) What is the purpose of LCD in Basic Operator Panel (BOP) in AC drive?

Indicate the status of drive Monitor the parameter of AC drive Indicate the display error in reading Indicate the incorrect operation of BOP

4) Which is the correct sequence operation of key button in BOP of AC drive to change the direction of rotation?

Press ON - REV -ON Press OFF - REV - ON Press ON - OFF - REV -ON Press ON -REV - OFF -ON

5) What is the purpose of PROG / DATA button in BOP of AC drive?

To change the parameter setting To store the entered data and factory stored data To display the data direction of rotation forward / REV To display the data status of frequency and current