This article is reposted from Juncai Magnetic Applications, with copyrights belonging to the original author; the original link can be found at the end of the article under "Sources".

According to information from the China National Intellectual Property Administration, Xiaomi Auto Technology Co., Ltd. has filed a patent titled "Motor Rotor, Motor, and Vehicle," with Publication No. CN123034646A and an application date in August 2026. The patent abstract reveals that the disclosure pertains to a motor rotor, a motor, and a vehicle. The motor rotor includes a rotor core and permanent magnets disposed on the rotor core. The permanent magnets comprise multiple permanent magnet layers sequentially arranged along the radial direction. Each permanent magnet layer includes multiple individual permanent magnets sequentially arranged along the circumferential direction. In adjacent permanent magnet layers, the individual permanent magnets correspond to each other one-to-one along the circumferential direction, and the magnetic pole deflection angles of the corresponding individual permanent magnets are not entirely identical. In the motor rotor provided by this disclosure, the magnetic field can be guided to concentrate towards the air gap side, enhancing the magnetic flux density on the air gap side while simultaneously reducing the magnetic flux density away from the air gap side, i.e., on the rotor core side. This forms a better flux-concentrating effect, thereby significantly reducing the thickness of the rotor core under the premise of ensuring the motor's output performance, and even allowing the rotor core to be omitted, which significantly reduces the rotor weight and realizes the lightweight design of the motor. In addition, the radial layering design of the permanent magnets can reduce the electromagnetic torque ripple value of the motor, giving it better electromagnetic performance.

According to data from Tianyancha, Xiaomi Auto Technology Co., Ltd., established in 2021 and headquartered in Beijing, is an enterprise primarily engaged in automobile manufacturing. The company has a registered capital of 1 billion RMB. Big data analysis from Tianyancha indicates that Xiaomi Auto Technology Co., Ltd. has made external investments in one enterprise, participated in 17 bidding projects, and holds 4,005 patent records. Additionally, the company possesses 611 administrative licenses.

Sources

163.com › web (2026-11-03)
Original link: Xiaomi Auto Files Patent for Motor Rotor, Motor, and Vehicle, Significantly Reducing Rotor Weight
https://www.163.com/dy/article/LASQMP2U0519QIKK.html

Xiaomi Auto Files Patent for Motor Rotor, Motor, and Vehicle, Significantly Reducing Rotor Weight

Sources