Q. Which of the following drive can be used for derricks and winches ? (Solved)
1. DC motors with Ward Leonard control
2. AC slip-ring motors with variable resistance
3. Pole changing squirrel cage motors
4. Any of the above.
- d. Any of the above.
1. DC motors with Ward Leonard control
2. AC slip-ring motors with variable resistance
3. Pole changing squirrel cage motors
4. Any of the above.