What is meant by armature reaction?
Armature reaction is the way in which the armature magnetic field influences the main field in a generator or motor. It happens when the current in the armature winding cuts the main magnetic field wherein the flux distribution in the machines is affected.
Armature reaction can impact a machine’s performance, leading to issues like:
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Decreased efficiency
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Increased heat generation
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Mechanical stress
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The induced EMF in the armature has been reduced
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Sparking at the brushes
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Demagnetization of pole cores
Armature reaction is significant in electrical machine control and design to ensure that the end product provides required performance under various loading conditions.