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：US10348141B2

公开(公告)日：2019-07-09

申请号：US15266587

申请日：2016-09-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hu Li ,  Yuichi Yoshikawa ,  Hiroshi Murakami ,  Haruhiko Kado ,  Kiyomi Kawamura

IPC: H02K1/16 ,  H02K21/16 ,  H02K3/18 ,  H02K1/14 ,  H02K29/03 ,  H02K1/27

Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M