Patent ID: 11881746
Assignee: NIDEC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A rotor comprising:
a rotor iron core including electrical steel sheets that are layered in an axial direction, the rotor iron core configured to rotate about a center axis, wherein
the rotor iron core includes
at least two flux barrier groups, and
at least two slot groups penetrating the electrical steel sheets in the axial direction,

each of the at least two flux barrier groups includes at least two flux barriers,
each of the at least two slot groups includes at least two slots,
each flux barrier of the at least two flux barriers has an elongated shape on a cross-section of the rotor iron core, the cross-section being perpendicular to the axial direction, two ends of said each flux barrier being closer to a circumferential surface of the rotor than an intermediate portion of said each flux barrier,
each slot of the at least two slots has an elongated shape, only one end of said each slot being adjacent to the circumferential surface of the rotor, and the other end of said each slot being more distant from the circumferential surface than the one end of said each slot,
the at least two flux barrier groups and the at least two slot groups are provided at intervals in a circumferential direction of the rotor iron core,
said each of the at least two slot groups is a group of two or more slots arranged consecutively along the circumferential direction without being intervened by a flux barrier group of the at least two flux barrier groups,
said each of the at least two flux barrier groups is a group of two or more flux barriers arranged consecutively along the circumferential direction without being intervened by a slot group of the at least two slot groups, one flux barrier of the two or more flux barriers of the flux barrier group being accompanied by at least one other flux barrier that belongs to the flux barrier group, the one flux barrier extending along the at least one other flux barrier from one end to the other end of the at least one other flux barrier, and
a number of the at least two flux barrier groups is larger than a number of the at least two slot groups.