Patent ID: 11894725
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A rotating electric machine comprising:
a stator having an annular shape; and
a rotor provided inside the stator,
wherein the rotor includes a plurality of stages of rotor units stacked in an axial direction of the rotor,
wherein each of the plurality of stages of rotor units includes a pair of permanent magnets and a slit arranged in one or more rows in a radial direction of the rotor between the pair of permanent magnets,
wherein shapes of the pair of permanent magnets arranged in each of the plurality of stages of the rotor units are the same for the plurality of stages of the rotor units,
wherein the slit has an arc-like shape that projects and is curved inward in a radial direction of the rotor and extends in a circumferential direction of the rotor, the slit having an opening opposed to an inner peripheral surface of the stator,
wherein, when an angle formed between two straight lines that connect positions of both ends of the arc-like shape and a rotation axis center of the rotor is defined as an arc angle of the slit, at least one of the arc angle of the slit and the number of rows of the slits is different between at least two of the rotor units so as to set magnetic paths for reluctance magnetic flus different between at least two of the rotor units,
wherein, when the arc angle of the slit is divided into two arc angles by a center line of a magnetic pole formed by the pair of permanent magnets, and one of the two arc angles is defined as an arc angle on an advancing side in the rotating direction and the other arc angle is defined as an arc angle on a returning side in the rotating direction, the arc angle on the advancing side in the rotating direction and the arc angle on the returning side in the rotating direction are different from each other,
wherein the arc angle on the advancing side in the rotating direction is different between at least two of the rotor units, and
wherein the arc angle on the returning side in the rotating direction is different between at least two of the rotor units.