US 11,799,337 B2
Rotating electric machine
Junji Kitao, Tokyo (JP); Kosho Yamane, Tokyo (JP); Tomohira Takahashi, Tokyo (JP); and Yoshihiro Miyama, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/56,000
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Feb. 4, 2019, PCT No. PCT/JP2019/003871
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2020/017078, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 2018-135812 (JP), filed on Jul. 19, 2018.
Prior Publication US 2021/0218301 A1, Jul. 15, 2021
Int. Cl. H02K 1/27 (2022.01); H02K 21/16 (2006.01); H02K 1/276 (2022.01); H02K 1/2791 (2022.01); H02K 29/03 (2006.01)
CPC H02K 1/2766 (2013.01) [H02K 1/2791 (2022.01); H02K 21/16 (2013.01); H02K 29/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A rotating electric machine, comprising:
a stator including a stator core and a stator coil; and
a rotor including:
a rotor core arranged coaxially with the stator core via an air gap formed between the stator core and the rotor core; and
a plurality of permanent magnet groups each forming one magnetic pole, the plurality of permanent magnet groups being embedded in the rotor core and arranged at equiangular pitches in a circumferential direction,
wherein a flux barrier is formed between one set of permanent magnets adjacent to each other in the circumferential direction in each permanent magnet group forming one magnetic pole,
wherein a pair of ribs is formed of regions of the rotor core between the flux barrier and the one set of permanent magnets adjacent to each other,
wherein a first slit for causing a magnetic flux generated from the each permanent magnet group forming one magnetic pole to deviate in a rotating direction of the rotor is formed in a region of the rotor core on an air gap side in a radial direction of the each permanent magnet group forming one magnetic pole,
wherein an end portion of the first slit on a flux barrier side is positioned between extension lines of the pair of ribs, and
wherein a distance between the end portion of the first slit on the flux barrier side and the flux barrier is smaller than a distance between the end portion of the first slit on the flux barrier side and each of the one set of permanent magnets adjacent to each other.