Hybrid stepper motor utilizing axial coils for adjusting the magnetic field of the rotor
AssigneeGHSP, Inc.
InventorsLarry Duane Ridge, John Thomas Bagley
Life of this patent
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Abstract
A bi-polar hybrid stepper motor includes a stator having a primary winding. The stator and the primary winding are positioned within a housing. A rotor has a magnetic component. The rotor is rotationally operable relative to the stator. An axial coil assembly is positioned within the housing and located proximate ends of the rotor and having a secondary winding. At least a portion of the magnetic component of the rotor is produced by the axial coil assembly in an energized state. The energized state produces an electromagnetic communication between the rotor and the stator.
Claims20
An electric motor assembly comprising:
- a stator having a primary winding;
- a rotor that is rotationally operable relative to the stator;
- an axial coil assembly positioned proximate ends of the rotor and having a secondary winding, wherein:
- at least when the secondary winding is energized, the rotor is in electromagnetic communication with the stator, and
- when a primary winding and the secondary winding are energized, the rotor is in electromagnetic communication with the stator via an electromotive force that rotationally operates the rotor relative to the stator.
A bi-polar hybrid stepper motor comprising:
- a stator having a primary winding, wherein the stator and the primary winding are positioned within a housing;
- a rotor having a magnetic component, wherein the rotor is rotationally operable relative to the stator;
- and
- an axial coil assembly positioned within the housing and located proximate ends of the rotor and having a secondary winding, wherein, at least a portion of the magnetic component of the rotor is produced by the axial coil assembly in an energized state, wherein the energized state produces an electromagnetic communication between the rotor and the stator.
A method for operating a bi-polar hybrid stepper motor comprising:
- energizing a winding for a stator, wherein a rotor rotationally operates relative to the stator;
- producing a first magnetic component of the rotor via an axial coil assembly,
- operating the rotor using a first electromotive force that is produced by the energized winding of the stator and the first magnetic component of the rotor;
- modifying an electrical current to the axial coil assembly;
- producing a second magnetic component of the rotor via the modified electrical current of the axial coil assembly, wherein the first magnetic component is different than the second magnetic component;
- and
- operating the rotor using a second electromotive force that is produced by the energized winding of the stator and the second magnetic component of the rotor.
Dependencies are inferred from the claim text.