Movable permanent magnet stator electric motor
OwnerRobert Willoughby Garrett, IVinventor
Life of this patent
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Abstract
An electric motor with a movable permanent magnet stator is disclosed. The electric motor includes a rotor with an armature having a plurality of windings about the armature. A plurality of stator magnets are disposed about the rotor. The plurality of stator magnets a selectively positionable between a proximal position, in close proximity to the rotor, and a distal position, away from the rotor. An actuator is coupled to the plurality of stator magnets, the actuator operable to position the plurality of stator magnets between the proximal position and the distal position. The output of the electric motor is controlled by moving the stator magnets towards and away from rotor, rather than applying varying amounts of electricity to the rotor.
Claims16
An electric motor, comprising:
- a rotor having an elongate shaft, a commutator disposed at a first end of the elongate shaft, an armature disposed proximal to a second end of the elongate shaft, and a plurality of windings about the armature in communication with the commutator;
- a plurality of stator magnets radially disposed about the rotor, the plurality of stator magnets radially positionable between a proximal position in close proximity to the rotor and a distal position away from the rotor;
- and
- an actuator coupled to the plurality of stator magnets, the actuator operable to radially position the plurality of stator magnets between the proximal position and the distal position.
An electric motor, comprising:
- a rotor having an armature and a plurality of windings about the armature;
- a plurality of stator magnets radially moveably disposed relative to the rotor;
- and
- an actuator coupled to the plurality of stator magnets, the actuator operable to radially position the plurality of stator magnets between a proximal position, imparting a maximum magnetic force on the rotor, and a distal position, imparting a minimum magnetic force on the rotor.
A method of controlling an electric motor having an armature, a plurality of windings about the armature, and a stator comprising a plurality of magnets, the method comprising:
- radially positioning the plurality of stator magnets between a proximal position relative to the armature, imparting a maximum magnetic force on the armature, and a distal position relative to the armature, imparting a minimum magnetic force on the armature.
Dependencies are inferred from the claim text.