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US 6,674,205 B2Granted
Auxiliary magnetizing winding for interior permanent magnet rotor magnetization
AssigneeGeneral Motors Corporation
InventorsFrancois J. Biais, Khwaja M. Rahman
Life of this patent
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Abstract
A method and apparatus for fabricating a rotor for an electric traction motor including forming cavities in the rotor, injecting magnetic material in a portion of the cavities, configuring an electrical winding in a portion of the cavities, and post-magnetizing the magnetic material.
Claims19
An electric traction motor for a vehicle comprising:
- a housing;
- a wound stator field located in said housing;
- a rotor magnetically interacting with said wound stator field, said rotor including a permanent magnet;
- air spaces configured in said rotor;
- windings located in said air spaces;
- an
- wherein said permanent magnet is post-magnetized in said rotor by said windings located in said air spaces.
4 more elements
An electric traction motor comprising:
- a housing;
- a wound stator field located in said housing;
- a rotor magnetically interacting with said wound stator field, said rotor including an array of cavities;
- an electrical winding configured in said array of cavities;
- and
- wherein said electrical windings configured in said array of cavities post-magnetize magnetic material located in said rotor.
3 more elements
A method of fabricating a rotor for an electric traction motor comprising the steps of:
- forming cavities in the rotor;
- injecting magnetic material in a portion of the cavities;
- configuring an electrical winding in a portion of the cavities;
- and
- post-magnetizing the magnetic material.
2 more elements
An electric traction motor comprising:
- a housing;
- a wound stator field located in said housing;
- a rotor magnetically interacting with said wound stator field, said rotor including an array of cavities;
- magnetic material configured in said rotor;
- an electrical winding configured in said array of cavities;
- and
- wherein said electrical windings configured in array of cavities and said wound stator field post-magnetize said magnetic material located in said rotor.
4 more elements
An electric traction motor of a vehicle comprising:
- a housing;
- a wound stator field located in said housing;
- a rotor magnetically interacting with said wound stator field, said rotor including permanent magnet;
- air spaces configured in said rotor;
- windings located in said air spaces;
- and
- wherein said permanent magnet is post-magnetized in said rotor by said windings located in said air spaces and said wound stator field.
4 more elements
Dependencies are inferred from the claim text.