Axial flux brushless permanent magnet electrical machine rotor
AssigneeLaunchpoint Technologies, Inc.
InventorsMichael Richard RICCI, Jonathan Gordon SUGAR, Bradley Evan PADEN, David Brian PADEN
Life of this patent
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Abstract
An axial flux brushless permanent magnet electrical machine having a stator and at least one rotor. The rotor includes a Halbach array of magnets with at least four magnets per magnetic cycle. The rotor magnets are contained within pockets in the rotor. The pockets are formed with magnet pocket walls being radial walls, active surface walls, and/or inactive surface walls where the walls retain the magnets within the pockets.
Claims7
1) An axial flux brushless permanent magnet electrical machine comprising:
- a stator;
- and
- at least one rotor, the rotor including
- a Halbach array of magnets consisting of at least four magnets per magnetic cycle,
- the magnets are contained within pockets,
- the pockets are formed
- partly by an outer predominantly circumferential wall that retains the magnets against centrifugal load and
- partly by radial walls between adjacent magnets in the Halbach array, and
- the radial walls join with hub structure of the rotor on an inner end thereof and with the circumferential wall on an outer end thereof, where the axial dimension of the radial walls is chosen larger than the smallest circumferential dimension of one of the magnets.
4) A rotor for an axial flux brushless permanent magnet electrical machine, the rotor comprising:
- an annular ring;
- and
- an annular Halbach array of magnets with an active surface of the array directed along an axis of the annular ring, the array having at least four magnets per magnetic cycle, each magnet being un-bonded to an adjacent magnet in the annular ring in at least four locations around the ring.
Dependencies are inferred from the claim text.