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US 10,518,624 B2Granted
Motor having non-rectangular rotor magnets
AssigneeFord Global Technologies, LLC
InventorsFeng Liang, C Bing Rong, Michael W. Degner, Lusu Guo
Life of this patent
Estimating the term…
Abstract
A hybrid powertrain utilizes a motor with a permanent magnet rotor. The rotor is formed by inserting parallelepiped magnets into slots. To reduce the likelihood of demagnetization, the net magnetization of each magnet is oriented parallel to a sidewards surface of the magnet and not perpendicular to an outwards surface of the magnet. The magnets may be arranged in multiple rows. The magnets in each row may be perpendicular to a rotor radial or diagonal to a rotor diagonal.
Claims17
A motor comprising:
- a stator;
- a rotor supported for rotation with respect to the stator, the rotor defining a plurality of magnet pockets;
- and
- a plurality of permanent magnets inserted into respective magnet pockets, each magnet having a non-cuboid parallelepiped form and having a net magnetization direction that is not perpendicular to any surface of the magnet;
- and
- wherein the plurality of magnets are arranged in sets of magnets that extend radially about the rotor, each set including a first magnet that is disposed between second and third magnets, the first magnet of each set having an outer surface that is oriented perpendicular to a radial of the rotor intersecting the first magnet, and the second and third magnets having outer surfaces that are oriented diagonally to radials of the rotor intersecting, the second and third magnets, respectively.
3 more elements
A motor comprising:
- a stator;
- a rotor supported for rotation with respect to the stator, the rotor defining a plurality of magnet pockets;
- and
- a plurality of permanent magnets inserted into respective magnet pockets, each magnet having a non-cuboid form and having a net magnetization direction that is not perpendicular to an outward surface of the magnet, wherein the plurality of magnets are arranged in sets of magnets that extend radially about the rotor, each set of magnets including a first magnet that is disposed between second and third magnets, the first magnet of each set having an outer surface that is oriented perpendicular to a radial of the rotor intersecting the first magnet, and the second and third magnets having outer surfaces that are oriented diagonally to radials of the rotor intersecting the second and third magnets, respectively, wherein the net magnetization direction of each magnet of the first, second, and third magnets of each set is non-parallel with the net magnetization directions of the other magnets of the first, second, and third magnets of each set.
1 more element
A vehicle comprising:
- a rotor defining a plurality of magnet pockets;
- and
- a plurality of permanent magnets inserted into respective magnet pockets, each magnet having a non-cuboid parallelepiped form and having a net magnetization direction that is not perpendicular to any magnet surface, wherein the plurality of magnets are arranged in sets of magnets that extend radially about the rotor, each set including a first magnet that is disposed between second and third magnets, the first magnet of each set having an outer surface that is oriented perpendicular to a radial of the rotor intersecting the first magnet, and the second and third magnets having outer surfaces that are oriented diagonally to radials of the rotor intersecting the second and third magnets, respectively.
Dependencies are inferred from the claim text.