The armature current of the synchronous motor
Correct answer: C. has large values for low and high excitation
- A. has large values for low excitation i niy
- B. has large values for high excitation only
- C. has large values for low and high excitation
- D. any of the above
Explanation
The synchronous motor has a V-curve: armature current is minimum at unity power factor and rises for both under-excitation and over-excitation. Therefore, low and high excitation both produce large armature current.
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