Patent ID: 11955843
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A motor, comprising:
a stator defining an interior space;
a rotor disposed in the interior space of the stator, wherein the rotor includes:
a body defining a structure, wherein the structure defines a plurality of cavities in the body of the rotor,
wherein the plurality of cavities comprises at least a first cavity, a second cavity, and a third cavity,
wherein the first cavity is spaced radially outward from the second cavity and the third cavity, and the second cavity is spaced radially outward from the third cavity,
wherein a thickness of the first cavity is larger than a thickness of the second cavity and the third cavity,
wherein a thickness of the second cavity is larger than a thickness of the third cavity,
wherein each cavity of the plurality of cavities comprises a middle portion, a first cavity arm, and a second cavity arm, and
wherein the first cavity arm and the second cavity arm extend radially outward from the middle portion,
wherein a geometry of the middle portion of the cavity comprises a concave-shaped portion; and
a plurality of magnets disposed in the plurality of cavities, wherein at least some of the cavities of the plurality of cavities has a magnet from the plurality of magnets disposed therein.