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In the case of Zero Power factor leading load on the alternator, the effect of armature reaction is

  • In the case of Zero Power factor leading load on the alternator, the effect of armature reaction is to decrease the Induced EMF.
  • When an alternator is operating under zero power factor leading load conditions, the current flowing through the armature winding leads the voltage across the winding.
  • Under these conditions, the armature reaction of the alternator produces a demagnetizing effect on the main flux.
  • This is because the armature reaction creates a flux that is perpendicular to the main flux and opposes its direction.
  • As a result, the effective flux in the air gap is reduced, which leads to a decrease in the induced EMF.
  • The demagnetizing effect of the armature reaction is more pronounced under leading power factor conditions because the armature current is in phase with the flux produced by the armature winding.