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US 12,381,026 B2Granted
Systems and methods for demagnetization of a permanent magnet rotor
AssigneeFord Global Technologies, LLC
InventorsWanfeng Li, Franco Leonardi, Michael Degner
Life of this patent
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Abstract
Methods and systems for demagnetizing a rotor. The method includes, in one example, adjusting a position of magnetic poles mounted on a frame in a demagnetization system in relation to a first electric machine rotor, and decreasing the magnetization of the first electric machine rotor via operation of the demagnetization system to generate an electromagnetic field.
Claims20
A method comprising:
- adjusting a position of a plurality of magnetic poles in a demagnetization system in relation to a first electric machine rotor;
- and
- decreasing a magnetic flux of the first electric machine rotor via operation of the demagnetization system to generate an electromagnetic field;
- where the plurality of magnetic poles are positioned on a frame.
1 more element
A demagnetization system, comprising:
- a frame;
- a plurality of magnetic poles adjustably attached to the frame;
- and
- a controller including instructions stored on non-transitory memory that when executed cause the controller to:
- decrease a magnetic flux of a first electric machine rotor via operation of the demagnetization system to generate an electromagnetic field.
2 more elements
A method comprising:
- adjusting a radial position of a plurality of magnetic poles in a demagnetization system in relation to a first electric machine rotor;
- and
- decreasing a magnetic flux of the first electric machine rotor via operation of the demagnetization system to generate an electromagnetic field;
- where the plurality of magnetic poles are positioned on a frame.
1 more element
Dependencies are inferred from the claim text.