What is the effect of armature reaction in dc generator?
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The effect of armature reaction in dc generator.
Explanation:
Basically there are two windings in a dc motor - Armature winding (on rotor) and field winding (on stator). When we excite the field winding, it produces a flux which links with the armature. This causes an emf and hence a current in the armature. This current in armature produces another flux which lags the main flux. This is referred to as armature reaction.
It has two effects on the machine:
1. Demagnetising effect: It reduces the strength of the main flux.
2. Crossmagnetising effect: Its effect is that it bends/distortes the the main flux line along the conductor
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