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US 12,665,478 B2Granted
Bearingless split teeth flux reversal motor
AssigneeMassachusetts Institute of Technology
InventorsKrishan Kant, David L. Trumper
Life of this patent
Estimating the term…
Abstract
A bearingless split tooth flux-reversal motor (FRM) for use with a pump, such as a centrifugal blood pump. In some embodiments, the motor has a magnet-free rotor and a magnetic configuration wherein the force generation is independent of the rotor angle, allowing for simple radial force generation using stator-fixed currents. The motor torque can be generated using commutated two-phase currents.
Claims20
A motor comprising:
- a stator having a plurality of split teeth, each split tooth including a first coil winding and a second coil winding, one or more of the split teeth including:
- a first tooth portion that includes the first coil winding and a first permanent magnet having a first polarity;
- and
- a second tooth portion that includes the second coil winding and a second permanent magnet having a second polarity opposite the first polarity;
- and
- a magnet-free rotor having one or more salient features,
- wherein the motor is configured to drive current through the first coil winding and the second coil winding to levitate the magnet-free rotor using a magnet-biased reluctance actuator principle and to rotate the magnet-free rotor using a flux-reversal operating principle, and
- wherein the motor is configured to generate torque and rotational force independently.
5 more elements
A bearingless split-tooth slice motor comprising:
- a stator having a plurality of split teeth each having two coil windings and one or more of which having two permanent magnets of opposite polarity;
- a magnet-free rotor having a plurality of salient features;
- and
- a controller configured to:
- drive current through the coil windings of the plurality of split teeth to levitate and rotate the magnet-free rotor, and
- to independently generate torque and rotational force on the magnet-free rotor.
3 more elements
A system comprising:
- a pump;
- and
- a motor configured to drive the pump and including:
- a stator having a plurality of split teeth each having two coil windings and one or more of which having two permanent magnets of opposite polarity;
- a magnet-free rotor having one or more salient features;
- and
- a controller configured to drive current through the coil windings of the plurality of split teeth to:
- levitate and rotate the magnet-free rotor using a flux-reversal operating principle, and
- independently generate torque and rotational force on the magnet-free rotor.
6 more elements
Dependencies are inferred from the claim text.