公开(公告)号：US20240128816A1

公开(公告)日：2024-04-18

申请号：US18395645

申请日：2023-12-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Bin Lai ,  Yu Wang ,  Zijing Wang ,  Huanwen Huang

IPC: H02K1/276 ,  H02K11/25 ,  H02K21/14

CPC classification number: H02K1/2766 ,  H02K11/25 ,  H02K21/14

Abstract: A variable flux permanent-magnet synchronous motor, a powertrain, and a fan are disclosed, which are applied to the field of motors. The variable flux permanent-magnet synchronous motor includes a stator system 10, a rotor system 20, and a variable magnet system 30. The variable magnet system 30 is located in the stator system 10 or the rotor system 20. The rotor system 20 includes a first permanent magnet 201. The variable magnet system 30 includes a second permanent magnet 301 and a heating apparatus 302. Coercive force of the second permanent magnet 301 is lower than coercive force of the first permanent magnet 201. The heating apparatus 302 is configured to heat the second permanent magnet 301, so that the second permanent magnet 301 has variable flux in a magnetic field.

公开(公告)号：US20230163647A1

公开(公告)日：2023-05-25

申请号：US18157712

申请日：2023-01-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Bin Lai ,  Hua Lan ,  Mengde Li ,  Zijing Wang

IPC: H02K1/276 ,  H02K1/02 ,  H02K21/14

CPC classification number: H02K1/276 ,  H02K1/02 ,  H02K21/14

Abstract: This application provides a motor rotor, including a rotor iron core and a plurality of permanent magnets disposed on the rotor iron core. Coercive forces of at least some permanent magnets are continuously gradiently distributed or gradiently distributed in a multi-stage manner from the middle to both ends along at least one direction perpendicular to a magnetization direction. The permanent magnet with a gradient coercive force design is used in the motor rotor. A coercive force of the permanent magnet is continuously gradiently distributed or gradiently distributed in a multi-stage manner from the middle to both ends. In this way, a coercive force change of the entire permanent magnet is uniform, and stability and reliability of the motor can be maximized. In addition, this can avoid excessive anti-demagnetization performance, reduce an amount of usage of heavy rare earth elements, and minimize costs of the motor.