Certain synchronous motor connected to infinite bus-bars has a constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have

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Electrial Engineering MCQ on Synchronous Motors

Certain synchronous motor connected to infinite bus-bars has a constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have

  1. Lagging power factor with over-excitation
  2. Leading power factor with over-excitation
  3. Leading power factor with under-excitation
  4. No change of power factor

Correct answer: 2. Leading power factor with over-excitation

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