An important advantage of a synchronous motor over wound round induction motor is that
Correct answer: A. its power factor may be varied at will
- A. its power factor may be varied at will
- B. its speed is independent of supply frequency
- C. its speed may be controlled more easily
- D. none of the above
Explanation
A synchronous motor can operate underexcited, at unity power factor, or overexcited, allowing its power factor to be adjusted by changing field current. Its speed, in contrast, is fixed by supply frequency and poles.
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