Abstract: An axial flux motor includes a motor shaft, a double-row angular contact ball bearing, and a stator. The double-row angular contact ball bearing is sleeved on the motor shaft and is fixedly connected to the motor shaft through a bearing inner ring of the double-row angular contact ball bearing. The stator is sleeved on the motor shaft through the double-row angular contact ball bearing, and the stator is fixedly connected to a bearing outer ring, so that the motor shaft can rotate relative to the stator. In this application, the double-row angular contact ball bearing is used in the axial motor, the double-row angular contact ball bearing can bear axial force generated through interaction between the stator and a rotor.

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.

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.

Abstract: This application provides an oil-cooled motor, a powertrain, and a vehicle. The oil-cooled motor includes a rotating shaft and a first rotor iron core and a second rotor iron core that are sleeved on the rotating shaft and are adjacent to each other. A rotating shaft oil channel configured to communicate with a cooling system is disposed in the rotating shaft. M first oil channels that penetrate through two end faces of the first rotor iron core are disposed in the first rotor iron core. N second oil channels are disposed in the second rotor iron core. According to the oil-cooled motor provided in this application, a contact area between cooling oil and an interior of a rotor can be increased without affecting structural strength and magnetic conductivity of the rotor, so that cooling effect is improved.

Abstract: A motor and a vehicle. The motor includes a stator iron core and a flat wire winding structure. Each stator slot has n layers of the flat wire winding structure. Each phase of the flat wire winding structure includes a first part and a second part, the first part occupies a layers in the stator slot, and the second part occupies b layers in the stator slot, and a?b. In addition, in each pole of each phase of the flat wire winding structure, a stator slot wound with the first part and a stator slot wound with the second part are staggered by y1 slots. The pitch y is less than a pole pitch y0. In this way, the flat wire winding structure is a short-pitch winding, and further, when the motor runs, good torque fluctuation suppression effect is achieved.

Abstract: This application describes examples of a rotor disk and a manufacturing method thereof, a rotor structure, a disk motor, and an electric vehicle. In one example, the rotor disk includes a rotor iron core. The rotor iron core is provided with a plurality of groups of accommodating cavities at intervals in a circumferential direction of the rotor iron core. Each group of accommodating cavities includes a first accommodating cavity and a second accommodating cavity. The first accommodating cavity and the second accommodating cavity are provided in a radial direction of the rotor iron core and are in communication with each other. The first accommodating cavity and the second accommodating cavity are configured to respectively accommodate a first unit portion and a second unit portion of a first magnet.

Abstract: Embodiments of the present disclosure provide a rotor, a motor, a powertrain, and a vehicle. The rotor includes wedges and pole shoes. The wedges fit the pole shoes through curved portions. The curved portions can effectively relieve stress concentration of joint portions, increase strength of the wedges and the pole shoes, and effectively increase effective winding space of slots in the rotor. In this way, power density of a motor in which the rotor is used is increased.

Abstract: An axial flux motor includes a motor shaft, a double-row angular contact ball bearing, and a stator. The double-row angular contact ball bearing is sleeved on the motor shaft and is fixedly connected to the motor shaft through a bearing inner ring of the double-row angular contact ball bearing. The stator is sleeved on the motor shaft through the double-row angular contact ball bearing, and the stator is fixedly connected to a bearing outer ring, so that the motor shaft can rotate relative to the stator. In this application, the double-row angular contact ball bearing is used in the axial motor, the double-row angular contact ball bearing can bear axial force generated through interaction between the stator and a rotor.