Electrical Engineering · Synchronous Motor
When the excitation of a 3-phase synchronous motor is continuously increased from under-excitation to over-excitation, how do the armature current and power factor change?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Power factor increases and then decreases; armature current increases and then decreases
- 2Armature current decreases and then increases; power factor increases and then decreases✓
- 3Power factor decreases and then increases; armature current decreases and then increases
- 4Armature current increases and then decreases; power factor decreases and then increases
Correct answer
Armature current decreases and then increases; power factor increases and then decreases
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