Which of the following AC. motors is usually used in large motor-generator sets?
Correct answer: A. Synchronous motor
- A. Synchronous motor
- B. Squirrel cage induction motor
- C. Slip ring induction motor
- D. Any of the above
Explanation
A synchronous motor is commonly used to drive large motor-generator sets because it operates at constant speed and can provide high efficiency and power-factor correction. Induction motors are more common where these speed and power-factor advantages are not required.
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