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

Claim 3:
4. A Halbach magnet array comprising:
at least one first magnetic material piece having magnetization in a direction parallel to a first direction;
at least one second magnetic material piece having magnetization in a direction different by 180° from the direction of the magnetization of the first magnetic material piece; and
at least one third magnetic material piece having magnetization in a direction parallel to a second direction perpendicular to the first direction,
wherein the at least one first magnetic material piece and the at least one second magnetic material piece are alternately arranged in the second direction with the third magnetic material piece interposed therebetween,
wherein 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,
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, and
wherein the thickness t1 and the thickness t2 satisfy a formula t1<t2.