Huawei Digital Power Technologies Co., Ltd.

Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Mengde Li

Yi Li

Xin Huang

Hao Zheng

Hui Yang

Hua Lan

Bin Lai

Zijing Wang

Heyun Lin

Linpeng Yin

A rotor is provided, and is used in a permanent-magnet motor. The rotor includes a rotating shaft () and a rotor iron core () sleeved on the rotating shaft (). The rotor further includes several first permanent-magnet structures (), the several first permanent-magnet structures () are distributed on the rotor iron core () in a circumferential direction of the rotor iron core (), each first permanent-magnet structure () includes a first permanent magnet () and a second permanent magnet () that are disposed in a radial direction of the rotor iron core (), and coercive force of the first permanent magnet () is less than coercive force of the second permanent magnet ().

Rotor, permanent-magnet motor, motor drive system, and vehicle

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.

Motor rotor and motor

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.

Six-phase flat wire wave winding structure, six-phase motor, powertrain, and vehicle

Growing community of inventors

Shanghai, China

Mengde Li