Armature Reaction

Armature Reaction Points : Armature Reaction DC Generator Armature reaction is the term used to describe the effects of the armature mmf on the air-gap field. Armature mmf has definite effects on both the space distribution of the air-gap flux and the magnitude of the net flux per pole. The flux distribution affects the limits of successful commutation while the flux magnitude affects the generated voltage and torque per unit of armature current. Modern machines are usually equipped with additional magnetic poles and windings-inter- poles and compensating windings-that oppose and neutralize the effects of armature reaction.