公开(公告)号：US20210281132A1

公开(公告)日：2021-09-09

申请号：US17192303

申请日：2021-03-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Mitsutoshi AKITA ,  Daisuke ICHIGOZAKI ,  Tatsuhiko HIRANO ,  Kyoko NAKAMURA ,  Akira YAMASHITA

IPC: H02K1/27

Abstract: A plurality of auxiliary magnets is embedded in a rotor core so as to surround the rotation axis of the rotating electrical machine in the cross-section orthogonal to the rotation axis. A plurality of main magnets is embedded in the rotor core so as to extend from the auxiliary magnet in the outer circumferential direction of the rotor. A plurality of magnetic poles of the rotor is formed around the rotation axis, the magnetic poles each having the auxiliary magnet and the plurality of main magnets arranged at a distance from each other in the circumferential direction of the rotor, and the plurality of main magnets of each magnetic pole is arranged asymmetrically about a virtual line passing the rotation axis and axisymmetrically dividing the auxiliary magnet of each magnetic pole.

公开(公告)号：US20240297541A1

公开(公告)日：2024-09-05

申请号：US18583772

申请日：2024-02-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takahiro SAITO ,  Kyoko NAKAMURA ,  Hikohito YAMAZAKI

IPC: H02K1/2783 ,  H02K29/03

CPC classification number: H02K1/2783 ,  H02K29/03

Abstract: An electric motor has a rotor with a plurality of magnets arranged on a surface of the rotor. When viewed along an axial direction of the rotor, the plurality of magnets may have following features: a direction of a magnetic pole of each of the plurality of magnets is rotated by 45 degrees sequentially from one to next along a circumferential direction of the rotor; and a width of each of the magnets of which the magnet pole direction is inclined by 45 degrees relative to a radial direction of the rotor is wider than a width of each of the magnets of which the magnet pole direction coincides with the circumferential direction or the radial direction.

公开(公告)号：US20220140675A1

公开(公告)日：2022-05-05

申请号：US17517169

申请日：2021-11-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daisuke ICHIGOZAKI ,  Kyoko NAKAMURA ,  Masaaki ITO

IPC: H02K1/27 ,  H02K15/03

Abstract: Provided is a motor capable of suppressing reduction of the torque of the motor even if the amount of use of the permanent magnets embedded in the rotor core is reduced. A motor includes a rotor with permanent magnets embedded in a rotor core, and a stator positioned on an outer circumference of the rotor. The rotor includes magnetic poles formed around a rotation axis of the rotor, the magnetic poles having the permanent magnets arranged therein. The permanent magnets in adjacent magnetic poles are arranged such that positions of a north pole and a south pole of the permanent magnet in one magnetic pole are inverted from those of the permanent magnet in a magnetic pole adjacent to the one magnetic pole. The permanent magnets each have a residual magnetization that decreases as it moves from the north pole toward the south pole.

公开(公告)号：US20210281153A1

公开(公告)日：2021-09-09

申请号：US17192263

申请日：2021-03-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Keiu KANADA ,  Daisuke ICHIGOZAKI ,  Kazuaki HAGA ,  Motoki HIRAOKA ,  Daichi MARUYAMA ,  Hisamitsu TOSHIDA ,  Kyoko NAKAMURA ,  Akira YAMASHITA

IPC: H02K21/02

Abstract: A rotating electrical machine capable of obtaining a higher torque while limiting the amount of permanent magnets used. A magnetic pole of a rotor includes an auxiliary magnet embedded in a rotor core and at least one main magnet arranged on an outer circumferential side than the auxiliary magnet of the rotor. In each magnetic pole, the distance from an end of the main magnet, the end facing the auxiliary magnet, to the auxiliary magnet facing the main magnet is shorter than the length of the main magnet in the radial direction. In a cross-section orthogonal to the rotation axis of the rotating electrical machine, the main magnets of each magnetic pole are arranged so as to be asymmetrical about a virtual line passing the rotation axis and axisymmetrically dividing the auxiliary magnet,