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repulsion motor
A type of AC motor in which the source current is supplied to the stator winding, and current is induced into the rotor windings. The rotor windings end at copper bars on a commutator, and brushes pick up rotor current. The brushes are connected together so they short-circuit some of the rotor windings.
Rotor current flowing through the short-circuited coils produces a magnetic field whose axis is at an angle to the magnetic field in the stator. Because the two magnetic fields are at an angle to each other, they repel, or push away from, each other.
The brushes of a repulsion motor are usually mounted on a control that allows them to be rotated with reference to the stator field. Moving the brushes controls the direction of rotation and the speed of a repulsion motor.
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- Industry/Domain: Aviation
- Category: Aeronautics
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