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.

公开(公告)号：US12261496B2

公开(公告)日：2025-03-25

申请号：US17741783

申请日：2022-05-11

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Hao Zheng ,  Linpeng Yin ,  Mengde Li

IPC: H02K3/28 ,  H02K3/12

Abstract: A six-phase flat wire wave winding structure. Each phase of wave winding structure has a wire-in end, a wire-out end, and a wire located between the wire-out end and the wire-in end. The six-phase flat wire wave winding structure is applicable to a 2M-layer (M=1, 2, 3 . . . ) six-phase motor whose quantity of slots of each phase in each pole is q, whose quantity of stator slots is 6q (q=1, 2, 3 . . . ) times of a quantity of poles, and whose quantity a of parallel branches is 1 or 2. Each phase of the wave winding structure has conductors in all layers of a same stator slot, and the wave windings are uniformly and symmetrically distributed. In addition, problems that a flat wire winding process is highly difficult and manufacturing costs are high due to an increase in a quantity of phases of the six-phase motor are effectively resolved.