Dipole interior permanent magnet slice rotors
AssigneeMassachusetts Institute of Technology
InventorsDavid L. Trumper, Benjamin Weinreb
Life of this patent
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Abstract
A motor system can include a bearingless stator having a plurality of magnetic windings including rotation windings and suspension windings; a dipole interior permanent magnet (IPM) rotor positioned within the stator, the rotor having a plurality of permanent magnets disposed within a cylindrical structure; one or more position sensors to measure radial and angular position of the rotor; and a controller configured to receive measurements from the one or more position sensors and to generate current commands for the stator to excite the rotation windings to generate torque and to excite the suspension windings to stabilize the rotor within the stator.
Claims15
A motor system comprising:
- a bearingless stator having a plurality of magnetic windings including rotation windings and suspension windings;
- a dipole interior permanent magnet (IPM) rotor positioned within the stator, the rotor having a plurality of permanent magnets disposed within a cylindrical structure;
- one or more position sensors to measure radial and angular position of the rotor;
- a controller configured to receive measurements from the one or more position sensors and to generate current commands for the stator;
- and
- power electronics to receive and amplify the current commands to excite the rotation windings to generate torque and to excite the suspension windings to stabilize the rotor within the stator.
A method comprising:
- obtaining one or more measurements of radial and angular position of a dipole interior permanent magnet (IPM) rotor using one or more position sensors, the rotor positioned within a bearingless stator having a plurality of magnetic windings including rotation windings and suspension windings, the rotor having a plurality of permanent magnets disposed within a cylindrical structure;
- generating current commands for the stator based on the one or more measurements;
- exciting the rotation windings using the current commands to generate torque;
- and
- exciting the suspension windings using the current commands to stabilize the rotor within the stator.
Dependencies are inferred from the claim text.