Explain what happens to the speed of a series motor as the load decreases

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Explain what happens to the speed of a series motor as the load decreases..

Answer / prabhu

The speed of the dc series motor rises when the load of the motor decreases due to decrease in field current or armature current (field current = armature current in series motor). decrease in field current or armature current causes decrease in field flux so speed increases, because field current is iversely proportional to field flux.

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