Machines utilizing heavy rare earth free permanent magnets
AssigneeNorth Carolina State University
InventorsMd. Sariful Islam, Iqbal Husain
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Abstract
Various examples are provided related to machines utilizing heavy rare earth (HRE) free permanent magnets. In one example, a rotor assembly including a rotor core having a plurality of rotor slots and magnets positioned within the plurality of rotor slots. At least a portion of the magnets are free of heavy rare earth (HRE) elements. The magnets can include a combination HRE segments and HRE-free segments or can be free of HRE elements. The rotor assembly can be included in an electric machine such as, e.g., a permanent magnet (PM) machine.
Claims20
A permanent magnet (PM) machine, comprising:
- a rotor assembly comprising:
- a rotor core having a plurality of rotor slots;
- and
- a plurality of magnets positioned within the plurality of rotor slots, where at least a portion of individual magnets of the plurality of magnets are free of heavy rare earth (HRE) elements.
A rotor assembly for an electric machine, comprising:
- a rotor core having a plurality of rotor slots;
- and
- individual magnets positioned within corresponding magnet cavities of the plurality of rotor slots, where at least a portion of the individual magnets are free of heavy rare earth (HRE) elements.
Dependencies are inferred from the claim text.