The minimum armature current of the synchronous motor corresponds to operation at______________?
Correct answer: B. unity power factor
- A. zero power factor leading
- B. unity power factor
- C. 0.707 power factor lagging
- D. 0.707 power factor leading
Explanation
For a given mechanical load, the armature current is minimum when the motor operates at unity power factor. Leading or lagging reactive current adds to the active-current component and increases the total current.
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