Hyper halbach permanent magnet arrays
AssigneeThe Boeing Company
InventorMark A Cleveland
Life of this patent
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Abstract
Higher-order Halbach permanent magnet arrays that produce higher flux densities in the air gaps of electromotive machines are described. In one embodiment, a second order “Hyper” Halbach array includes a plurality of magnets arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns in which the respective magnetic fields of a first row of the array are arranged so as to define a conventional first order Halbach array, and, proceeding in a column direction of the array, the respective magnetic fields of the magnets of each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to those of the immediately preceding row.
Claims20
A second order Halbach array of magnets, comprising:
- a plurality of magnets fixedly arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns, wherein
- respective magnetic fields of magnets of said plurality of magnets in a first column of the array are disposed 180 degrees out of phase with each other, and
- proceeding in a row direction of the array, respective magnetic fields of magnets of said plurality of magnets in each of a second and succeeding columns of the array are respectively rotated counter-clockwise about an axis perpendicular to the row direction of the array through successive 90 degree rotations relative to respective magnetic fields of magnets of said plurality of magnets in an immediately preceding column.
A second order Halbach array of magnets, comprising:
- a plurality of magnets fixedly arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns, wherein
- respective magnetic fields of magnets of said plurality of magnets in a first row of the array are arranged so as to define a first order Halbach array, and
- proceeding in a column direction of the array, respective magnetic fields of magnets of said plurality of magnets in each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to respective magnetic fields of magnets of said plurality of magnets in an immediately preceding TOW.
A third order Halbach array of magnets, comprising:
- a plurality of second order Halbach arrays of magnets, each comprising:
- a plurality of magnets fixedly arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns, wherein
- respective magnetic fields of magnets in a first row of the array are arranged so as to define a first order Halbach array, and
- proceeding in a column direction of the second order Halbach array, respective magnetic fields of magnets of said plurality of magnets in each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to respective magnetic fields of magnets of said plurality of magnets in an immediately preceding row, wherein
- each of the magnets is identically elongated and square in cross section, and
- proceeding in a column direction of the third order array, each of a second and succeeding rows of the second order Halbach arrays are rotated counter-clockwise about an axis perpendicular to the column direction of the third order array through successive 90 degree rotations relative to an immediately preceding second order Halbach array.
Dependencies are inferred from the claim text.