Double stator permanent magnet machine
AssigneeBoard of Regents, The University of Texas System
InventorsBabak Fahimi, Wei Wang
Life of this patent
Estimating the term…
Abstract
A double stator permanent magnet machine includes an inner stator having a back iron and a set of inner stator poles connected to the back iron, a rotor having a shaft and a set of segments, each segment having a permanent magnet, adjacent the inner stator and rotatively coupled to the inner stator, an outer stator having a set outer stator poles, adjacent the rotor and rotatively coupled to the rotor, a set of inner windings disposed between each of the inner stator poles, and a set of outer windings disposed between each of the outer stator poles.
Claims20
A double stator permanent magnet machine comprises:
- an inner stator, further comprising a back iron and a set of inner stator poles connected to the back iron;
- a rotor, further comprising an outer cage and a shaft connected to the outer cage, rotatively coupled to the inner stator;
- a set of segments, each segment further comprising a permanent magnet, connected to the outer cage;
- an outer stator, further comprising a set of outer stator poles, rotatively coupled to the rotor;
- a set of inner stator windings disposed between each of the inner stator poles;
- a set of outer stator windings disposed between each of the outer stator poles;
- a set of phases, each phase further comprising a subset of the set of inner stator windings and a subset of the set of outer stator windings;
- whereby the rotor rotates with respect to the inner stator and the outer stator, a reluctance torque is produced by the rotor and a reaction torque is produced by the rotor at a ratio of at least 1:3, when a current is selectively connected to the set of phases.
A double stator permanent magnet machine comprises:
- an inner stator, further comprising a back iron, a set of inner stator poles connected to and extending radially outward from the back iron spaced at a set of equal inner angular intervals, and a set of inner stator windings disposed within the set of inner stator poles;
- a rotor, further comprising a set of segments, an outer cage attached to the set of segments, and a shaft connected to the outer cage, each segment of the set of segments further comprising a permanent magnet, rotatively connected to the inner stator;
- an outer stator, further comprising a set of outer stator poles spaced at a set of equal outer angular intervals and a set of outer stator windings disposed within the set of outer stator poles rotatively connected to the rotor;
- a set of phases, each phase further comprising a subset of the set of inner stator windings and a subset of the set of outer stator windings;
- and,
- wherein a current is selectively connected to the set of phases to effect a rotation of the rotor about the shaft.
A method for operating a double stator permanent magnet machine comprising the steps of:
- providing an inner stator, further comprising a back iron and a set of inner stator poles connected to the back iron;
- providing a rotor, further comprising an outer cage, a shaft connected to the outer cage, and a set of segments connected to the outer cage, each segment further comprising a permanent magnet, rotatively coupled to the inner stator;
- providing an outer stator, further comprising a set of outer stator poles, rotatively coupled to the rotor;
- providing a set of inner stator windings disposed between each of the inner stator poles;
- providing a set of outer stator windings disposed between each of the outer stator poles;
- providing a set of phases, each phase further comprising a subset of the set of inner stator windings, a subset of the set of outer stator windings, and a flux linkage surrounding the subset of the set of inner stator windings and the subset of outer stator windings;
- and
- selectively energizing the set of phases with a current.
Dependencies are inferred from the claim text.