Patent ID: 11888368
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 16:
17. A rotor having 2n (n is a natural number) magnetic poles and including a plurality of layered magnets composed of two to m (m is a natural number and a divisor for n) layers that are stacked in an axial direction, wherein
each layered magnet of the plurality of layered magnets includes
at least one first permanent magnet forming part of an outer peripheral surface of the rotor and magnetized to have polar anisotropy, and
at least one second permanent magnet that is a different type from the at least one first permanent magnet, is adjacent to the at least one first permanent magnet in a circumferential direction of the rotor, has lower magnetic force than magnetic force of the at least one first permanent magnet, and is magnetized to have polar anisotropy, and
in each first permanent magnet of the plurality of layered magnets, supposing one cycle is an angle formed by adjacent north poles in a plane orthogonal to the axial direction of the rotor, positions of north poles of two first permanent magnets adjacent to each other in the axial direction are shifted from each other by n/m cycles in the circumferential direction, and
the at least one second permanent magnet is a single integral ring-shaped magnet.