Armature Reaction DefinitionArmature reaction in an alternator is defined as the effect of the armature’s magnetic field on the main magnetic field of the alternator or synchronous generator.Magnetic Field InteractionWhen the armature carries current, its magnetic field interacts with the main field, causing either distortion (cross-magnetizing) or reduction (demagnetizing) of the main field flux.Power Factor InfluenceAt unity power factor, the angle between armature current I and induced emf E,

What is Armature Reaction in DC Machine?Armature reaction definitionThe armature reaction in a DC motor is the effect of the armature magnetic flux on the main magnetic field, changing its distribution and intensity.Cross magnetizationCross-magnetization due to the armature current affects the magnetic field by moving the magnetic neutral axis, resulting in efficiency problems.Brush ShiftA natural solution to the problem appears to shift the brushes along the direction of rotation in generator a