Electrical Engineering XYZ MCQs
Field weakening control method is used for which speed:
- Below rated speed
- Above rated speed
- Both of the above
- None of the above
Correct answer: 2. Above rated speed
Explanation: The method is specifically useful when the requirement is to drive the motor at speeds higher than its rated (or base) speed. By weakening the field, the motor’s speed can be increased beyond the level that would be possible with the rated field strength and voltage. This is crucial in applications where variable speed is needed and occasionally higher speeds are beneficial, such as in electric vehicles, hoists, lifts, and certain industrial machinery.