公开(公告)号：US09893575B2

公开(公告)日：2018-02-13

申请号：US14778575

申请日：2014-03-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kiyomi Kawamura ,  Hiroaki Kawasaki ,  Yuichi Yoshikawa ,  Yasushi Kato ,  Haruhiko Kado ,  Noritaka Aso

IPC: H02K21/12 ,  H02K1/27 ,  H02K1/02 ,  H02K1/14 ,  H02K1/16 ,  H02K3/12 ,  H02K15/03

CPC classification number: H02K1/2706 ,  H02K1/02 ,  H02K1/14 ,  H02K1/16 ,  H02K1/276 ,  H02K3/12 ,  H02K15/03 ,  H02K2213/03

Abstract: A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.

公开(公告)号：US12266977B2

公开(公告)日：2025-04-01

申请号：US17995654

申请日：2021-02-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kenta Suzuki ,  Eiki Morimoto ,  Hajime Ukaji ,  Toshiyuki Tamamura ,  Noritaka Aso

IPC: H02K1/276 ,  H02K1/16 ,  H02K1/28

Abstract: A rotor includes: a rotor core including a plurality of first holes and a plurality of second holes; and a plurality of first permanent magnets arranged in the plurality of first holes, wherein the first holes and the second holes are provided radially around a rotating shaft, the rotor core in each of the plurality of second holes has a radial length smaller than a radial length of the rotor core in each of the plurality of first holes, each of the plurality of second holes is located closer to an inner side in the radial direction of the rotor core with respect to a first hole adjacent to the second hole in a circumferential direction of the rotor core among the plurality of first holes, and includes a protrusion protruding toward the first hole adjacent to the second hole in the circumferential direction of the rotor core.

公开(公告)号：US11979072B2

公开(公告)日：2024-05-07

申请号：US17296511

申请日：2020-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hajime Ukaji ,  Noritaka Aso ,  Katsuhiro Hirata ,  Noboru Niguchi ,  Kazuaki Takahara ,  Hironori Suzuki ,  Tsubasa Kamigaki

IPC: H02K49/10 ,  H02K7/116 ,  H02K16/02 ,  H02K21/14

CPC classification number: H02K49/102 ,  H02K7/116 ,  H02K16/02 ,  H02K21/14

Abstract: A magnetic geared motor includes a stator including a plurality of teeth that produce a magnetomotive force, a first rotor that rotates by the magnetomotive force of the stator, and a second rotor that, in response to rotation of the first rotor, rotates at a lower speed than the first rotor. The first rotor, the second rotor, and the stator are disposed coaxial to each other, and a plurality of magnets of different polarities are disposed in respective slot openings present between each two adjacent teeth.