In a universal motor, severe arcing at the brushes from changing the direction of rotation is prevented by shifting the brushes to the neutral (sparkless) plane or by adding a compensating winding.

Question

Quizplus · Accepted Answer

Shifting the brushes to the neutral plane or adding a compensating winding can prevent severe arcing at the brushes in a universal motor when changing the direction of rotation.

In a Universal Motor, Severe Arcing at the Brushes from Changing