Interior Permanent Magnet Motor
AssigneeKomotek Co., Ltd.
InventorsDeok Geun Kim, Han Sam Cho, Kyu Yun Hwang
Life of this patent
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Abstract
An interior permanent magnet motor includes a stator having teeth on which a coil is wound, a rotor rotatably provided inside the stator, the rotor including a plurality of rotor sectors, and at least two permanent magnet recesses formed between the rotor sectors. Ferrite permanent magnets are embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor. Rare-earth permanent magnets are embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor.
Claims19
An interior permanent magnet motor comprising:
- a stator having teeth on which a coil is wound;
- a rotor rotatably provided inside the stator, the rotor comprising a plurality of rotor sectors;
- at least two permanent magnet recesses formed between the rotor sectors;
- ferrite permanent magnets embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor;
- and
- rare-earth permanent magnets embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor.
An interior permanent magnet motor comprising:
- a stator having teeth on which a coil is wound;
- a rotor rotatably provided inside the stator, the rotor comprising a plurality of rotor sectors;
- and
- a first recess and a second recess formed between the rotor sectors, wherein a ferrite permanent magnet is embedded in the first recess, and a rare-earth permanent magnet is embedded in the second recess,
- wherein the second recess is located outer than the first recess, and the size of the second recess is smaller than that of the first recess.
Dependencies are inferred from the claim text.