Patent ID: 11901118
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a Halbach magnet array, the method comprising in this order:
a) magnetizing at least one first magnetic material piece and at least one second magnetic material piece in a direction parallel to a first direction,
wherein the at least one first magnetic material piece and the at least one second magnetic material piece are alternately arranged in a second direction perpendicular to the first direction with a third magnetic material piece interposed therebetween,
wherein each of the at least one first magnetic material piece adheres to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t1,
wherein each of the at least one second magnetic material piece adheres to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t2,
wherein the thickness t1 and the thickness t2 satisfy a formula t1<t2,
wherein the at least one first magnetic material piece and the at least one second magnetic material piece have easy axes of magnetization parallel to the first direction,
wherein the third magnetic material piece has an easy axis of magnetization parallel to the second direction, and
wherein the direction of magnetizing the at least one first magnetic material piece is different from the direction of magnetizing the at least one second magnetic material piece by 180°, and
b) magnetizing the third magnetic material piece in a direction parallel to the second direction such that the third magnetic material piece has a south pole opposed to the adjacent first magnetic material piece and a north pole opposed to the adjacent second magnetic material piece.